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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Architecture trade-off between manipulator types for hot cell operations in a nuclear dockyard radiochemistry facility. Master-slave manipulators provide direct force feedback essential for handling fragile reactor components and small samples.">
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            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Active Effluent Treatment Plant — evaporation plus ion exchange polishing was selected over direct ion exchange or chemical precipitation alone. Direct IX would exhaust resin rapidly given the mixed fission product and activation product inventory typical of dockyard reactor coolant samples, generating excessive volumes of spent resin as ILW. Chemical precipitation alone cannot reliably achieve the Environmental Agency discharge limits of 0.1 Bq/L alpha. The evaporator provides 20:1 volume reduction and removes the bulk of dissolved solids, while IX polishing of the low-activity condensate targets specific long-lived nuclides (Cs-137, Sr-90, Co-60) to achieve final discharge quality. Sub-atmospheric evaporation was chosen specifically to suppress ruthenium tetroxide volatilisation, which is a known issue in fuel examination laboratories where irradiated fuel dissolution produces volatile Ru species. The SIL 2-rated discharge control with dual-path instrumentation (hardwired analogue for safety, Modbus TCP for records) follows established nuclear industry practice for separating safety and information functions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Treatment technology selection for liquid radioactive waste from radiochemistry operations. Evaporation achieves higher volume reduction factors than direct ion exchange for mixed-radionuclide waste streams.">
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      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:ARC-DECISIONS-003" LAST-CHANGE="2026-04-24T20:18:41.421Z">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC-DECISIONS-003">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Air treatment train sequencing driven by ALARP dose reduction and filter protection. HEPA before carbon prevents particulate loading of the carbon bed, extending carbon service life and reducing secondary waste.">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Separation of safety-critical monitoring (hardwired analogue) from data management functions (digital network) follows IEC 61511 and ONR Safety Assessment Principle ECS.3, ensuring that a single common-cause failure (e.g., network outage, software bug, cyber attack) cannot simultaneously compromise both the alarm function and the data recording function. This architecture was chosen over a fully digital approach because the criticality and radiation alarm functions are Class 1 safety systems requiring the highest reliability.">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC-DECISIONS-005">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Solid Radioactive Waste Management System — Seven-component decomposition separating physical waste processing (sorting, compaction, conditioning, storage) from information management (NDA, tracking, sealed sources). The separation of waste characterisation (NDA) from waste processing (compaction, conditioning) enables independent calibration and quality assurance of measurement systems without disrupting waste throughput. The Waste Tracking and Records System is centralised rather than distributed across components because the 150-year record retention requirement demands a single authoritative data source. Sealed source management is a distinct component because it follows a fundamentally different regulatory regime (HASS Regulations and IRR17) from bulk radioactive waste (Environmental Permitting Regulations).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Seven-component decomposition reflects the distinct physical processing steps, regulatory regimes, and failure modes in the UK radioactive waste management chain. Separating waste sorting from NDA, and conditioning from storage, enables independent commissioning, maintenance, and regulatory inspection of each capability. The spent sealed source management function is separated because it has distinct regulatory requirements under IRR17 Regulation 27 and a different lifecycle from routine operational waste.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
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      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:ARC-DECISIONS-006" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
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            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Sample Receipt and Preparation Laboratory — Linear workflow with parallel preparation paths. The subsystem is decomposed into a linear sample flow (Reception Bay to Logging Station to Storage to Preparation) with two parallel preparation branches: acid digestion for solid samples requiring dissolution, and direct aliquoting within the fume cupboard for liquid samples. This topology reflects the fundamentally different preparation requirements of solid matrices (soil, concrete, metal) versus liquid matrices (coolant, pond water, effluent). A single fume cupboard serves both branches because the operations are not concurrent for any individual sample. The Contamination Control and Waste Segregation Point is positioned at the laboratory exit rather than distributed, following ALARP principles — a single controlled exit simplifies monitoring, reduces the number of contamination instruments requiring calibration, and provides a definitive boundary between controlled and supervised areas. The Acid Digestion System is a separate component rather than a sub-function of the fume cupboard because it requires distinct safety controls (pressure vessel management, temperature trips) and generates the majority of the liquid waste stream.">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Documents the architectural reasoning for the Sample Receipt and Preparation Laboratory's component topology. The linear workflow with parallel preparation paths reflects the need to maintain sample chain of custody while maximising throughput during submarine reactor campaigns.">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Radiochemical Separations Laboratory — Separation of extraction chromatography from electrodeposition as distinct components, with glassware decontamination and tracer storage as independent support functions. The alternative of a single monolithic wet chemistry area was rejected because (1) extraction chromatography generates acid fumes requiring dedicated fume cupboard extract, while electrodeposition generates minimal fumes but requires electrical isolation and DC power, making co-location in the same fume cupboard impractical; (2) tracer and reference standard storage must be physically separated from active separations to prevent contamination of calibration materials, which would introduce systematic errors across all analytical methods; (3) glassware decontamination produces large effluent volumes that would overload individual fume cupboard drip trays if co-located, and its NaI(Tl) monitoring rig requires a low-background environment incompatible with active separations areas. The reagent storage system is centralised rather than distributed per cupboard to enable COSHH-compliant ventilated bulk storage and LIMS-integrated inventory management.">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Documents the separation of extraction chromatography from electrodeposition as distinct components within the Radiochemical Separations Laboratory. This reflects the different skill sets, equipment, and contamination control requirements of wet chemistry versus source preparation, and allows independent optimisation of each process.">
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      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:ARC-DECISIONS-008" LAST-CHANGE="2026-04-24T20:18:41.421Z">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Gamma Spectrometry Suite — Electromechanical cryocoolers selected over liquid nitrogen cooling to eliminate cryogen handling in a nuclear-licensed facility. LN2 dewars require manual filling, generate oxygen-depleted atmosphere risk in enclosed counting rooms, and introduce vibration during fill that interrupts acquisitions. Stirling-cycle cryocoolers achieve comparable vibration-induced resolution degradation (less than 0.05 keV) with modern microphonic rejection algorithms. Four detectors rather than two were selected because SYS-REQS-012 requires at least one operational detector at all times; with four, the probability of total loss of gamma capability is less than 10E-8 per year assuming individual detector MTBF of 20000 hours.">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Documents the selection of electromechanical cryocoolers over liquid nitrogen cooling for HPGe detectors. Cryocoolers eliminate LN2 handling hazards in a radiologically controlled area, reduce ongoing operational costs, and remove the logistical dependency on regular LN2 deliveries to the dockyard site.">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
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      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:ARC-DECISIONS-009" LAST-CHANGE="2026-04-24T20:18:41.421Z">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Alpha Spectrometry Laboratory — Five-component architecture with 8 independent PIPS detector channels sharing a common MCA and software platform. Independent vacuum chambers per detector allow continuous counting on some channels while loading/unloading others, maximising throughput during campaigns. Automated sample changers with 24-position carousels enable unattended overnight counting, which is essential given the long count times (16-72 hours) required for low-activity environmental alpha samples.">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Architecture balances throughput (8 independent channels for parallel counting of long-lived alpha emitters) against cost by sharing vacuum and detector electronics infrastructure across channels.">
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      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:ARC-DECISIONS-010" LAST-CHANGE="2026-04-24T20:18:41.421Z">
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          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Liquid Scintillation Counting Facility — Dedicated tritium enrichment capability rather than outsourcing. The decision to include a full electrolytic enrichment system was driven by the dockyard's environmental monitoring obligations under the site discharge authorisation, which require monthly tritium results in groundwater at sub-Bq/L sensitivity. Outsourcing enrichment to an external laboratory would introduce 2-3 week turnaround delays incompatible with the monthly reporting cycle, and the classified nature of some dockyard samples precludes off-site transfer. The enrichment system adds capital and maintenance cost but is the only architecture that meets both the sensitivity and timeliness constraints simultaneously.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="In-house tritium enrichment avoids transport of tritiated samples off-site, which would require authorised carrier arrangements and increase sample turnaround time during reactor maintenance campaigns from weeks to days.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="architecture; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:ARC-DECISIONS-011" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC-DECISIONS-011">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: ICP-MS Analysis Suite — Quadrupole with collision-reaction cell over sector-field ICP-MS. A sector-field (high-resolution) ICP-MS would provide superior abundance sensitivity and eliminate many polyatomic interferences directly, but at 3-4x the capital cost, higher maintenance burden, and requirement for a specialist operator. The quadrupole with KED collision cell resolves the critical interferences (ArAr on Se-78, ArCl on As-75, ClO on V-51) adequately for dockyard work, and the UH+ tailing at mass 239 is correctable algorithmically when Pu concentrations are above 0.1 fg/mL. For the rare samples requiring higher mass resolution (Pu-239/U-238H discrimination at extreme U:Pu ratios), the chemical separation step using extraction chromatography removes U before measurement, making the abundance sensitivity requirement manageable for the quadrupole platform.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Quadrupole ICP-MS with collision-reaction cell provides adequate mass resolution for naval reactor chemistry analysis at significantly lower acquisition and maintenance cost than sector-field instruments. CRC technology resolves the key polyatomic interferences affecting actinide measurements.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="architecture; icp-ms; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:ARC-DECISIONS-012" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC-DECISIONS-012">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Laboratory Information Management System — The LIMS uses a centralised client-server architecture with a single high-availability database rather than a distributed or microservices architecture. This choice prioritises data consistency and audit trail integrity over scalability, which is appropriate because the laboratory serves a single dockyard with predictable, bounded throughput (5000 samples/year). A distributed architecture would introduce eventual consistency, making it impossible to guarantee that two concurrent users see identical sample states — unacceptable for chain-of-custody integrity. The instrument data acquisition function is separated from the core LIMS as a distinct gateway component rather than embedded in each instrument's native software, because this creates a single integration point that can implement store-and-forward buffering consistently across all 15+ instruments from multiple vendors (Canberra, Agilent, PerkinElmer, Ortec), each with different native data formats and communication protocols. The regulatory compliance module is deliberately read-only with respect to analytical results, enforced at the database view level rather than application-level permissions, because application-level controls can be bypassed by a sufficiently privileged database administrator, whereas view-level restrictions cannot without DBA intervention that would itself be logged.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Centralised client-server LIMS architecture ensures a single authoritative data source for nuclear material accountancy and regulatory reporting. Distributed architectures risk data inconsistency between nodes, which is unacceptable for safeguards-grade record-keeping.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="architecture; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-001" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-001">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Sample Transfer Port System and the Sample Receipt and Preparation Laboratory SHALL accept standard 50-100 litre shielded transport flasks via a docking mechanism that maintains shielding continuity during flask-to-cell transfer, with a maximum docking time of 15 minutes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Shielded transport flasks (50-100 litres) are the standard containers for moving high-activity reactor samples between the dockyard reactor facility and the laboratory. The docking mechanism must maintain shielding continuity to prevent dose spikes to operators during transfer. The 15-minute docking time limit prevents throughput bottlenecks during peak campaign sample intake when multiple flasks may arrive in sequence.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-002" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-002">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the In-Cell Ventilation Extract System and the Ventilation and Containment System SHALL deliver extract air via 300mm diameter stainless steel ductwork at a flow rate of 500 to 1500 cubic metres per hour, with dual isolation dampers for filter change-out.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="300mm ductwork maintains the required extract airflow velocity (&gt;1 m/s) to prevent particulate deposition while connecting the hot cell extract to the building ventilation system. Stainless steel is required for resistance to radioactive contamination and compatibility with decontamination reagents.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-003" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-003">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the In-Cell Radiation Monitoring Instrumentation and the Radiation Protection and Health Physics System SHALL transmit dose rate and alarm signals via hardwired 4-20 mA analogue channels for safety-critical functions and Modbus TCP for data logging, with a maximum signal latency of 100 milliseconds for alarm channels.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="4-20 mA analogue transmission over hardwired channels provides noise-immune, fail-safe dose rate data from inside the high-radiation hot cell environment to the health physics monitoring system. Digital interfaces would require radiation-hardened electronics inside the cell.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-004" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-004">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Cell Decontamination System and the Active Effluent Treatment Plant SHALL transfer contaminated washings via a gravity-fed active drain with a U-trap seal, at a maximum flow rate of 5 litres per minute, with the drain pH maintained between 1 and 7.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gravity-fed transfer via dedicated stainless steel pipework eliminates the need for pumps inside the hot cell and ensures contaminated washings drain to the effluent treatment plant without active equipment in the high-radiation zone. The 10-minute drain time prevents accumulation that could interfere with decontamination operations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-005" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-005">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Master-Slave Manipulator System and the Biological Shielding Structure SHALL penetrate the shielding wall via stepped plugs that maintain the shielding attenuation factor within 10% of the surrounding wall, with sealed boots preventing contamination migration along the manipulator shafts.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Stepped labyrinth penetrations through the biological shielding provide the required shielding integrity while allowing manipulator arm movement. The 150mm maximum penetration diameter and labyrinth geometry maintain the shielding specification, preventing radiation streaming through the wall penetration.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-007" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-007">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Active Drain Collection System and the Active Effluent Storage Tanks SHALL transfer liquid effluent via gravity flow through 50mm bore 316L stainless steel pipework with a minimum gradient of 1:40, with each drain line terminating below the minimum tank liquid level to prevent siphoning.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gravity flow via dedicated lined pipework ensures reliable effluent transfer without active pumping components that could fail and cause floor flooding in active areas. The 2 litres/second flow rate prevents back-up during high-volume operations such as cell decontamination campaigns.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-008" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-008">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Active Effluent Storage Tanks and the Neutralisation and Chemical Dosing Plant SHALL transfer batch volumes of 1000 to 5000 litres via a shielded centrifugal pump at 10 to 50 L/min, with flow totalisation accurate to plus or minus 2% and remotely operable isolation valves at both ends.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="1000-litre batch transfers enable processing of a full storage tank in a single operation, matching the tank sizing and treatment plant capacity. Chemical compatibility with pH 1-13 range accommodates the full spectrum of laboratory reagent waste streams including acid digestion and alkaline wash solutions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-009" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-009">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Evaporation and Concentration Unit condensate outlet and the Ion Exchange Treatment Columns SHALL deliver condensate at a maximum flow rate of 500 L/hr and a maximum temperature of 40 degrees Celsius, with inline conductivity monitoring to detect carryover of dissolved solids exceeding 50 mg/L.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="PVDF-lined pipework resists the corrosive condensate from the evaporator (acidic, containing trace radionuclides) and prevents metallic contamination that would interfere with downstream ion exchange performance. The 500 litres/hour flow rate matches the evaporator condensate output at design capacity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-010" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-010">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Evaporation and Concentration Unit concentrate outlet and the Concentrate and Sludge Handling System SHALL transfer concentrate via peristaltic pump through shielded 25mm bore 316L pipework at 1 to 10 L/min, with the transfer line designed for remote flushing and decontamination.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Peristaltic pumps are preferred for radioactive concentrate transfer because they have no seals in contact with the process fluid, eliminating leak paths. 316L stainless steel pipework provides corrosion resistance against concentrated acidic effluent. The 1-10 L/min flow range covers both routine and batch transfer operations. Remote flushing capability is essential for decontamination of the transfer line to prevent buildup of radioactive deposits that would increase dose rates and complicate future maintenance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-011" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-011">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Effluent Monitoring and Sampling Station and the Discharge Authorisation and Control System SHALL transmit gross alpha activity, gross beta activity, and gamma spectral data via hardwired 4-20 mA analogue channels for safety-critical trip signals, with a redundant Modbus TCP digital link for cumulative record-keeping and HMI display.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gross alpha/beta and gamma spectrometry data must be transmitted to the discharge control system before any treated effluent is released. The interface ensures the discharge authorisation system has real-time analytical confirmation that batch activity concentrations are below permit limits before opening discharge valves.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-012" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-012">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Discharge Authorisation and Control System and the Laboratory Information Management System SHALL transmit each discharge batch record including batch identifier, volume discharged, radionuclide-specific activities, date and time, and operator authorisation identifiers, within 60 seconds of batch completion.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Each discharge event must be recorded in the LIMS for regulatory reporting and cumulative discharge tracking against annual permit limits. The interface creates an immutable audit trail linking discharge volume, radionuclide concentrations, authorising officer, and timestamp for environmental permit compliance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-013" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-013">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Active Area Extract System and the HEPA Filtration Bank SHALL deliver contaminated extract air through 300mm diameter galvanised steel ductwork at a maximum velocity of 10 m/s with isolation dampers upstream and downstream of each HEPA filter bank.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The extract-to-HEPA interface must maintain gas-tight integrity to prevent contaminated air bypassing the filtration stage. Testable DOP ports enable in-situ filter efficiency testing required by Nuclear Site Licence Condition 27 (safety mechanisms) without breaking the ventilation containment boundary.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-014" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-014">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Pressure Cascade Control System and the Active Area Extract System SHALL provide 4-20 mA analogue control signals to the extract fan variable speed drives and motorised dampers, with a control loop update rate of at least 1 Hz.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="4-20 mA analogue control signals provide direct, deterministic control of extract fan speed from the pressure cascade controller. This ensures the negative pressure gradient from inactive to active areas is maintained continuously, which is the primary engineered barrier against airborne contamination migration.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-015" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-015">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Stack Monitoring Instrumentation and the Laboratory Information Management System SHALL transmit cumulative discharge data for each monitored radionuclide category at 15-minute intervals via Modbus TCP, with each record including timestamp, cumulative activity discharged, and instrument status.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Stack monitoring data must be transmitted to LIMS for cumulative discharge reporting against environmental permit limits. Automated transfer eliminates manual transcription of discharge values, which would be error-prone given the continuous nature of stack monitoring data and the regulatory consequences of incorrect reporting.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-016" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-016">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Supply Air Handling Unit and the active laboratory zones SHALL deliver supply air through ceiling-mounted diffusers at a maximum velocity of 0.3 m/s at the diffuser face to prevent turbulent disruption of fume cupboard containment.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Ceiling-mounted HEPA-filtered supply air through diffusers provides clean air at controlled temperature and humidity to protect sensitive analytical equipment and maintain operator comfort. The supply air completes the ventilation cascade by providing the replacement air drawn through the extract system.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-017" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-017">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Area Gamma Dose Rate Monitoring Network and the Centralised Radiation Monitoring Display and Alarm System SHALL transmit dose rate values from each detector via hardwired 4-20 mA analogue channels for safety-critical alarm functions and Modbus TCP for data logging and trending, with the analogue channel providing alarm actuation independent of the digital network, and a maximum signal latency of 2 seconds end-to-end for alarm signals.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Dual-path architecture (analogue + digital) ensures safety-critical alarm functions are not dependent on network availability or software correctness. The 4-20 mA analogue path provides deterministic alarm actuation per IEC 61511 for safety instrumented systems. Modbus TCP provides the data richness needed for trending, dose reconstruction, and regulatory reporting. The 2-second latency limit ensures alarm response within the 5-second detector-to-alarm budget defined in SUB-REQS-032.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radpro; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-018" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-018">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Personal Dosimetry Management System and the Radiological Access Control System SHALL provide cumulative dose status for each registered worker via a local database query with a response time not exceeding 500 milliseconds, supporting access decisions at zone entry turnstiles without perceptible delay to workers.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 500 ms database query response time ensures that access control decisions at turnstiles do not create perceptible delays, maintaining personnel throughput at shift change (typically 50-80 workers in 15 minutes). A slower response would incentivise manual override or tailgating. Local database query rather than remote API avoids network dependency at the physical access boundary.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radpro; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-019" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-019">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Criticality Warning System and the facility evacuation alarm system SHALL be hardwired relay-based, independent of all programmable electronic systems, driving sounder and beacon circuits directly from the criticality detection logic output, with end-to-end circuit supervision detecting open-circuit and short-circuit faults within 60 seconds of occurrence.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Hardwired relay-based interface ensures criticality evacuation alarms cannot be defeated by software failure, network outage, or cyber attack — a fundamental nuclear safety principle per ONR Safety Assessment Principle ECS.3 (independence of safety systems from control systems). End-to-end circuit supervision detects wiring faults that would otherwise leave the alarm circuit silently inoperable, with 60-second detection interval limiting the window of undetected failure.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radpro; criticality; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-020" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-020">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Centralised Radiation Monitoring Display and Alarm System and the Laboratory Information Management System SHALL transmit personal dose summaries, area monitoring alarm events, and contamination survey results via Modbus TCP at 15-minute intervals for routine data and within 60 seconds for alarm events, with each record including timestamp, source identifier, measurement value, and alarm status.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Integration with LIMS enables correlation of personal dose records with work activities and sample analyses, supporting ALARP dose optimisation. The 15-minute routine interval balances network traffic with data currency for operational planning. The 60-second alarm event transmission ensures the Radiation Protection Adviser receives near-real-time notification of abnormal conditions for statutory response obligations under IRR17.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radpro; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-021" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-021">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Airborne Contamination Monitoring System and the Ventilation and Containment System SHALL provide a hardwired trip signal to the Pressure Cascade Control System when any continuous air monitor in an active laboratory zone detects airborne alpha activity exceeding 1 DAC, initiating automatic increase of extract flow rate in the affected zone by at least 50% within 30 seconds of signal receipt.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Hardwired trip ensures the ventilation response to airborne contamination is not dependent on PLC software or network availability. Automatic extract flow increase dilutes and captures airborne contamination before it migrates to adjacent zones through the pressure cascade. The 1 DAC threshold triggers intervention before workers accumulate significant committed dose. The 30-second response time and 50% flow increase are derived from dispersion modelling of typical radiochemistry laboratory zone volumes (50-100 m³) to achieve a tenfold reduction in airborne concentration within 10 minutes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radpro; ventilation; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-022" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-022">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Waste Sorting and Segregation Facility and the Non-Destructive Assay System SHALL transfer waste items via shielded trolley on a level-access route, with each item accompanied by a digital waste identification tag readable by the NDA system's barcode scanner.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Shielded trolley transfer on a level-access route minimises manual handling of potentially high-dose-rate items and eliminates trip/fall risk during waste transfers. Digital waste identification tags ensure positive item tracking from sorting through assay, preventing mis-identification that could lead to incorrect categorisation. The barcode-based handover eliminates manual data entry errors at the NDA station.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-023" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-023">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Non-Destructive Assay System and the Waste Tracking and Records System SHALL transfer assay results electronically in a structured data format including package identifier, date of assay, radionuclide inventory with uncertainties, total activity, and fissile material mass, within 60 seconds of assay completion.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Electronic transfer of structured assay data within 60 seconds eliminates manual transcription errors and ensures the Waste Tracking System has current radionuclide inventory data for WAC compliance checking before the package proceeds to conditioning or storage. The specified data fields constitute the minimum dataset required by LLWR and RWM Waste Acceptance Criteria. Inclusion of uncertainties enables the tracking system to perform conservative compliance checks using upper confidence bounds.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-024" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-024">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the LLW Compaction and Packaging System and the Interim Radioactive Waste Store SHALL transfer loaded HHISO containers via forklift through a loading bay with a minimum clear opening of 3 metres width and 3.5 metres height, with the Waste Tracking System recording the container identifier and storage location at point of placement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 3 m x 3.5 m clear opening accommodates the standard forklift envelope for HHISO container handling with adequate clearance for safe manoeuvring. HHISO containers are the standard UK LLW transport and disposal container format. Recording container ID and storage location at point of placement maintains the chain of custody required by EPR16 permits and enables retrieval for inspection or re-characterisation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-025" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-025">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the ILW Conditioning and Encapsulation Plant and the Interim Radioactive Waste Store SHALL transfer conditioned 500-litre drums via overhead crane, with each drum's unique identifier, weight, surface dose rate, and date of conditioning recorded in the Waste Tracking System before placement in the ILW storage area.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Overhead crane transfer is required because conditioned ILW drums (500 litres of grouted waste) exceed the weight limit for forklift handling and the dose rates necessitate remote handling. Recording weight, surface dose rate, and conditioning date at transfer provides the pre-placement data needed for criticality safety assessment (fissile mass from weight and known loading), store shielding verification (dose rate), and curing period tracking (conditioning date). This data must be recorded before placement because drum retrieval from shielded storage for measurement is impractical.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-026" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-026">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Waste Tracking and Records System and the Laboratory Information Management System SHALL exchange analytical sample results and waste characterisation data via a bidirectional electronic link, with the LIMS providing radiochemical analysis results for waste samples and the Waste Tracking System providing sample-to-package traceability.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Bidirectional data exchange between LIMS and Waste Tracking enables correlation of radiochemical analysis results with waste packages, essential for waste characterisation when NDA alone is insufficient (e.g., pure beta emitters or difficult-to-measure nuclides like Ni-63, C-14). Sample-to-package traceability ensures that characterisation data used for WAC compliance is linked to the correct package, supporting the auditable waste management lifecycle required under UK regulatory framework.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-027" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-027">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Sample Logging and Labelling Station and the Laboratory Information Management System SHALL use an Ethernet TCP/IP connection carrying HL7-format or XML sample registration messages, with a maximum message latency of 2 seconds and automatic retry on communication failure, supporting a minimum of 100 sample registrations per hour.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Sample Logging Station must communicate sample metadata to LIMS at point of receipt to establish chain of custody and enable downstream laboratory scheduling. The 2-second latency and 100 registrations/hour throughput derive from peak campaign intake rates where delays in registration would bottleneck the preparation workflow and risk sample misidentification.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-028" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-028">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Sample Preparation Fume Cupboard and the Active Area Extract System SHALL be a 250mm diameter galvanised steel duct with a manual damper, connected via flanged coupling, maintaining a minimum extract flow rate of 0.35 cubic metres per second at the duct connection point.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The fume cupboard extract duct must maintain negative pressure within the cupboard enclosure to prevent radioactive aerosol escape to the occupied laboratory. The 0.35 m³/s extract rate at 250mm diameter generates a face velocity above the 0.5 m/s minimum mandated by nuclear site licence conditions for work with unsealed radioactive sources.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-029" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-029">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Contamination Control and Waste Segregation Point and the Active Drain Collection System SHALL be a 50mm bore stainless steel gravity drain with a trapped seal, fitted with a sampling point upstream of the sump discharge valve, and capable of handling acid effluent with pH range 1 to 12.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Active liquid waste from contamination monitoring and sample segregation must be routed to the active drain system with full containment and chemical compatibility. The pH 1-12 range accommodates acid digestion residues and decontamination solutions. The trapped seal prevents airborne contamination backflow from the drain system into the laboratory space.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-030" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-030">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Sample Transfer Port System and the Sample Reception Bay SHALL transfer sealed sample containers of up to 250ml volume through a pneumatic transfer tube or shielded carrier, with a maximum transfer time of 3 minutes and a double-seal containment to prevent contamination spread during transit.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Sample transfer between the Hot Cell/reception area and the preparation laboratory must maintain double-seal containment to prevent spread of high-activity contamination. The 3-minute transfer time ensures sample throughput keeps pace with campaign receipt rates. The 250mL volume accommodates the largest standard sample containers used in dockyard reactor coolant and swab sampling programmes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-031" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-031">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Sample Drying and Ashing Oven and the Active Area Extract System SHALL be a 150mm diameter heat-resistant stainless steel duct with an inline HEPA filter rated to 250 degrees Celsius, maintaining a minimum extract flow rate of 0.1 cubic metres per second to ensure negative pressure within the oven enclosure during operation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The drying and ashing oven generates volatile radionuclides and particulate at temperatures up to 500°C. The inline HEPA filter rated to 250°C on the extract duct prevents release of radioactive particulate to the general extract system. The 0.1 m³/s extract rate maintains negative pressure within the oven enclosure at all operating temperatures, preventing fugitive emissions to the laboratory.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-032" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-032">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Analytical Balance and Gravimetric Station and the Laboratory Information Management System SHALL transmit balance readings via RS-232 or USB serial connection to the LIMS client, with each transmitted record including: mass value, unit, stability indicator, timestamp, balance identifier, and ambient temperature from the integral sensor.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gravimetric measurements form the basis of activity concentration calculations, so mass data must transfer to LIMS without transcription error. RS-232/USB serial provides a direct instrument-to-LIMS data path. The inclusion of stability indicator and ambient temperature enables LIMS to flag readings taken under non-equilibrium or out-of-specification environmental conditions, which is critical for audit trail compliance under ISO 17025.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-033" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-033">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Radiochemical Fume Cupboard Array and the Active Area Extract System SHALL provide a minimum extract airflow of 0.6 cubic metres per second per fume cupboard through 200mm diameter stainless steel ductwork with HEPA filtration at the cupboard extract point.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Each radiochemical fume cupboard handles unsealed radioactive sources during separation chemistry. The 0.6 m³/s extract per cupboard at 200mm duct diameter maintains face velocities above the 0.5 m/s nuclear site licence requirement. HEPA filtration at the cupboard extract point captures particulate before it enters shared ductwork, preventing cross-contamination between fume cupboards and protecting the main HEPA bank from premature loading.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-034" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-034">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Active Laboratory Drain and Effluent Segregation System and the Active Effluent Treatment Plant SHALL transfer segregated high-activity liquid waste through acid-resistant borosilicate glass pipework rated for pH 0-14 at temperatures up to 80 degrees C, with a minimum bore of 50mm and gravity gradient of 1:40.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Radiochemical separations produce concentrated acid waste streams (HCl, HNO3, HF) that must be routed separately from low-activity drains to the effluent treatment plant. Borosilicate glass resists the full pH 0-14 range and temperatures generated by exothermic neutralisation. The 1:40 gravity gradient ensures reliable flow without pumping, reducing failure modes and avoiding mechanical agitation of settled activity in pipework.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-035" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-035">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Extraction Chromatography Station and downstream analytical instruments (Alpha Spectrometry Laboratory, Liquid Scintillation Counting Facility, ICP-MS Analysis Suite, Gamma Spectrometry Suite) SHALL be via labelled 20mL scintillation vials or sealed centrifuge tubes, each uniquely barcoded and registered in LIMS before transfer.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Separated fractions from extraction chromatography are distributed to four different analytical techniques depending on the nuclide of interest. Uniquely barcoded vials with LIMS registration before transfer maintain full chain of custody and prevent sample misidentification, which in a nuclear dockyard context could lead to incorrect dose assessment or waste characterisation errors with regulatory consequences.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-036" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-036">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Sample Receipt and Preparation Laboratory and the Radiochemical Separations Laboratory SHALL transfer dissolved sample aliquots in sealed, labelled vessels via a pass-through hatch with interlocked doors, with each transfer recorded in LIMS including sample identity, matrix, volume, and estimated total activity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Dissolved sample aliquots transferred between the preparation and separations laboratories cross a significant contamination boundary. The interlocked pass-through hatch prevents simultaneous opening of both sides, maintaining the pressure cascade between zones. LIMS recording of sample identity, matrix, volume, and estimated activity is required for criticality safety assessment and for the receiving laboratory to select appropriate separation procedures and shielding.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-037" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-037">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Tracer and Reference Standard Store and the Laboratory Information Management System SHALL provide real-time inventory data via barcode scanner integration, updating remaining volume, dispensing user, and date-time for each tracer withdrawal within 30 seconds of the dispensing event.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Radioactive tracers and reference standards have limited shelf lives and certified activities that decay with time. Real-time inventory tracking ensures analysts do not use expired or depleted standards, which would compromise measurement accuracy. The 30-second update latency aligns with the typical time between consecutive dispensing events during batch preparation, preventing double-dispensing errors.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-038" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-038">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Gamma Spectrum Analysis and Nuclide Identification Software and the Laboratory Information Management System SHALL transfer analysis results including nuclide identities, activity concentrations, combined measurement uncertainties, MDA values, and spectrum file references via an automated XML or CSV data bridge, with data integrity verified by checksum on each transfer.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gamma spectrometry results underpin waste sentencing, personnel dose assessment, and regulatory discharge reporting. Automated transfer with checksum verification eliminates transcription errors that could propagate into safety case calculations. The inclusion of combined measurement uncertainties and MDA values is mandatory for ISO 17025 accredited reporting and for demonstrating compliance with discharge authorisation limits.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; gamma-spec; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-039" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-039">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Electrodeposition and Source Preparation Unit and the Alpha Source Loading and Sample Changer SHALL transfer electrodeposited source discs of 25mm diameter on stainless steel planchets, each uniquely barcoded and registered in LIMS with source identifier, target nuclide group, and electrodeposition date before loading into the carousel.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The electrodeposited alpha source must transfer to the alpha spectrometer sample changer on a standard 25mm planchette without manual handling in the active area. Automated transfer reduces operator dose and prevents cross-contamination between samples that would compromise trace-level alpha spectrometry measurements.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; alpha-spec; session-234">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-040" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-040">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Alpha Spectrum Analysis Software and the Laboratory Information Management System SHALL transfer analysis results including nuclide identities, activity concentrations, combined measurement uncertainties, chemical yield values, and spectrum file references via an automated data bridge with checksum verification on each transfer.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Automated data transfer from alpha spectrometry analysis software to the LIMS eliminates manual transcription errors in activity concentration and uncertainty values, which are critical for waste characterisation decisions. Checksum verification ensures data integrity across the transfer, meeting ISO 17025 data integrity requirements and supporting regulatory audit of the analytical chain from spectrum to reported result.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; alpha-spec; session-234">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-041" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-041">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Tritium Distillation and Electrolytic Enrichment System and the Scintillation Cocktail and Vial Preparation Station SHALL transfer enriched water samples in 20 mL borosilicate glass vials with tamper-evident seals, accompanied by a data sheet recording the distillation batch number, enrichment factor, and deuterium spike recovery for each sample.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The distilled/enriched tritium fraction must transfer to the cocktail preparation station in a sealed pathway to prevent tritium vapour release (tritium is the most mobile radionuclide in the laboratory). The interface ensures quantitative transfer of the enriched fraction for accurate tritium activity determination.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-042" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-042">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Ultra-Low-Background LSC Counter Array and the LSC Spectrum Analysis and MDA Calculation Software SHALL transfer raw spectral data in 1024-channel MCA format including pulse shape discrimination parameters, external standard quench parameter SQP(E), counting time, and sample identification via the counter's native data export protocol.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Raw spectral data transfer at full resolution enables the analysis software to perform spectrum deconvolution, quench correction, and minimum detectable activity calculations. Loss of spectral resolution during transfer would compromise the ultra-low-background counting capability that defines this facility's tritium measurement performance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-043" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-043">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the LSC Spectrum Analysis Software and the Laboratory Information Management System SHALL transfer analytical results including activity concentration (Bq/L or Bq/kg), combined measurement uncertainty (k=2), minimum detectable activity, QC flag status, and sample identification in a validated electronic format with no manual transcription.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Automated transfer of validated results with associated uncertainties to LIMS ensures traceability from raw LSC spectrum to reported tritium activity. GUM-compliant uncertainty values must accompany every result for ISO 17025 accreditation compliance and nuclear material balance evaluation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-044" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-044">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Radiochemical Separations Laboratory and the Scintillation Cocktail and Vial Preparation Station SHALL deliver separated radionuclide fractions (Sr-90, Fe-55, Ni-63, C-14) in acid matrices compatible with the specified scintillation cocktail, with acid normality not exceeding 2M to prevent cocktail phase separation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Separated actinide fractions from radiochemical separation must reach the cocktail preparation station without cross-contamination. Each fraction contains a specific radionuclide group (Pu, Am/Cm, Sr) and contamination between fractions would produce incorrect results in safety-critical measurements.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-045" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-045">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Extraction Chromatography Station and the Clean Room Sample Preparation Enclosure SHALL deliver chemically separated actinide fractions in 2% HNO3 matrix with total dissolved solids below 0.1% m/v, accompanied by the separation batch record documenting tracer additions, column type, and elution volumes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Chromatographic separation produces purified analyte fractions that require ICP-MS analysis in a clean environment. Transfer to the ISO Class 5 enclosure prevents particulate contamination of sub-nanogram samples during the final preparation step before mass spectrometric measurement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; icp-ms; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-046" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-046">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Quadrupole ICP-MS and the ICP-MS Data Processing Software SHALL transfer raw time-resolved analysis data including individual isotope count rates at each integration period (100 ms minimum resolution), internal standard count rates, and instrument tuning parameters via the vendor acquisition software export protocol.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Time-resolved raw data at full mass resolution is essential for transient signal processing, peak integration, and interference correction algorithms in the data processing software. Loss of temporal resolution would prevent detection of signal instabilities caused by matrix effects during sample introduction.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; icp-ms; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-047" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-047">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the ICP-MS Data Processing Software and the Laboratory Information Management System SHALL transfer isotope ratio results, IDMS activity concentrations, and GUM uncertainty budgets in validated electronic format, with data retention for a minimum of 30 years in compliance with ONR nuclear site record-keeping requirements.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Isotope ratio results with measurement uncertainties must reach LIMS for nuclear material accountancy reporting. Automated transfer with full traceability metadata prevents manual transcription errors in safeguards-critical measurements and satisfies IAEA inspection requirements for data integrity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; icp-ms; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-048" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-048">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Instrument Data Acquisition Gateway and the LIMS Central Database Server SHALL transfer validated analytical results using structured database transactions with ACID guarantees, transmitting at minimum: instrument identifier, method code, sample identifier, raw count data, calibration-corrected results, acquisition start and end timestamps, and data quality flags, at a sustained throughput of at least 50 result records per minute.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The gateway-to-database interface is the primary data ingestion path for all instrument results. Validated data with integrity checksums ensures the database receives only quality-assured results, preventing corrupt or incomplete records from entering the regulatory reporting chain.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-049" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-049">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Sample Tracking and Chain of Custody Module and the Results Validation and Reporting Engine SHALL provide real-time sample metadata (sample identifier, matrix type, requested analyses, receipt date, client reference, and priority status) to the results engine, ensuring that no analytical result can be processed without a valid, active sample record in the tracking module.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The sample tracking module must provide real-time sample status to the results validation engine so that results can be matched to the correct sample, preparation method, and chain-of-custody record. Without this linkage, analytical results cannot be attributed to specific samples with forensic-quality traceability.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-050" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-050">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Results Validation and Reporting Engine and the Regulatory Compliance and Discharge Reporting Module SHALL transfer only authorised (two-stage reviewed) results, tagged with discharge pathway (liquid effluent, gaseous stack, solid waste), radionuclide identity, activity value, and combined uncertainty, using database views that aggregate by pathway and reporting period without permitting the regulatory module to modify source result records.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Validated results with approval chain metadata must flow to the regulatory reporting module for discharge calculations and statutory reports. The interface ensures only authorised, two-stage-reviewed results contribute to cumulative discharge totals, preventing unvalidated data from affecting permit compliance calculations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-051" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-051">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Quality Assurance and Audit Trail Module and the Instrument Data Acquisition Gateway SHALL receive calibration check results after every instrument calibration event, and SHALL automatically update Shewhart control charts and flag any result exceeding 2-sigma warning or 3-sigma action limits, generating a notification to the instrument custodian and preventing further analytical runs on the affected instrument until the out-of-control condition is investigated and cleared.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Calibration check data and instrument performance metrics from the data acquisition gateway enable the QA module to flag instruments operating outside calibration tolerance. This prevents results from miscalibrated instruments entering the quality system, which could invalidate entire analytical batches.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:IFC-DEFS-052" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-DEFS-052">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the LIMS Operator Workstation Array and the LIMS Network Infrastructure and Cybersecurity Layer SHALL authenticate every user session using Active Directory credentials with session timeout after 15 minutes of inactivity in active areas and 30 minutes in non-active areas, and SHALL encrypt all client-server traffic using TLS 1.2 or later with mutual certificate authentication.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Role-based authentication with session logging at the workstation-to-network interface implements the access control required by DNSR cybersecurity policy and nuclear material accountancy regulations. Every LIMS interaction must be attributable to a specific user for audit trail integrity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:STK-NEEDS-001" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-NEEDS-001">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL provide analytical results for primary coolant samples within 24 hours of sample receipt to support submarine reactor maintenance decision-making.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Submarine reactor maintenance campaigns operate on tight schedules driven by fleet operational readiness. Primary coolant chemistry results (fission product activity, corrosion product concentrations, boron assay) directly inform reactor restart decisions. A 24-hour turnaround enables the maintenance programme to proceed without delay; exceeding this window stalls reactor plant operations and impacts submarine availability. This reflects standard UK naval dockyard practice where the radiochemistry lab is on the critical path for reactor maintenance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:STK-NEEDS-002" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-NEEDS-002">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL comply with all conditions of the Nuclear Site Licence and Defence Nuclear Safety Regulator authorisations applicable to radiochemistry operations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="UK nuclear site licence conditions (enforced by ONR) and DNSR authorisations are legally binding. Non-compliance can result in enforcement action, facility shutdown, or prosecution. For a Ministry of Defence nuclear dockyard, DNSR authorisations impose additional defence-specific safety requirements beyond the civil nuclear regime. This is a non-negotiable regulatory baseline.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:STK-NEEDS-003" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-NEEDS-003">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL ensure all gaseous and liquid radioactive discharges remain within the limits specified in the site's Environmental Permit issued by the Environment Agency.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Environmental Permit sets legally enforceable radionuclide discharge limits based on the site's radiological impact assessment. Exceeding permitted discharge limits triggers Environment Agency enforcement action and potential prosecution under the Environmental Permitting Regulations 2016. The radiochemistry lab generates both liquid effluent (from dissolution, separation, and decontamination processes) and gaseous discharges (from hot cell ventilation and fume cupboards) that must be controlled within these limits.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:STK-NEEDS-004" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-NEEDS-004">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL maintain individual occupational radiation doses as low as reasonably practicable (ALARP) and below the statutory dose limit of 20 mSv per year effective dose.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 20 mSv/year effective dose limit is set by the Ionising Radiations Regulations 2017. ALARP is the UK legal duty under IRR17 and the Health and Safety at Work Act. Radiochemistry laboratory staff handle open radioactive sources including high-activity reactor coolant samples, fission products, and actinides, making dose management a primary design driver for shielding, containment, ventilation, and operating procedures.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:STK-NEEDS-005" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-NEEDS-005">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL demonstrate analytical measurement capability through accreditation to ISO/IEC 17025 and participation in national and international proficiency testing schemes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ISO/IEC 17025 accreditation is the internationally recognised standard for laboratory competence and is required by DNSR and ONR for safety-related measurements. Proficiency testing (e.g., NPL, IAEA schemes) provides independent validation that measurement results are accurate and comparable with other laboratories. Without accreditation, analytical results cannot be used for regulatory compliance reporting, waste characterisation, or reactor safety decisions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:STK-NEEDS-006" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-NEEDS-006">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL characterise all radioactive waste packages with sufficient radionuclide-specific data to meet the waste acceptance criteria of the receiving disposal facility.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Radioactive waste acceptance at UK disposal and storage facilities (LLWR, GDF, interim stores) requires waste packages to meet characterisation criteria defined by the receiving facility's environmental safety case. Insufficient radionuclide characterisation leads to waste package rejection, requiring costly recharacterisation or repackaging. The radiochemistry laboratory is the primary source of radionuclide-specific activity data used to populate waste records and demonstrate compliance with waste acceptance criteria.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:STK-NEEDS-007" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-NEEDS-007">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL prevent the uncontrolled accumulation of fissile material in any location within the facility sufficient to create a criticality risk.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Criticality prevention is a fundamental nuclear safety requirement. The laboratory processes fissile material (U-235, Pu-239, Pu-241) from reactor coolant samples and fuel-related analysis. Although individual sample quantities are small, accumulation over time in drains, evaporators, or waste containers could approach critical mass if not controlled. This requirement drives fissile material accountancy, mass limits per location, and engineered controls such as geometrically safe vessels.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:STK-NEEDS-008" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-NEEDS-008">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL maintain operational availability of at least 95% during scheduled submarine reactor maintenance campaigns.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Submarine reactor maintenance campaigns are scheduled events with defined programme milestones. If the radiochemistry laboratory is unavailable, reactor coolant sampling and analysis cannot proceed, stalling the maintenance programme and delaying submarine return to operational service. The 95% availability target during campaigns reflects the need for high reliability during these critical periods while allowing for scheduled maintenance and calibration of laboratory equipment.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:STK-NEEDS-009" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-NEEDS-009">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL be designed, constructed, and operated such that it can be safely decommissioned at the end of its operational life, with all radioactive materials removed and the facility returned to a condition suitable for unrestricted reuse or demolition.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Nuclear Site Licence Condition 35 (decommissioning) and the Energy Act 2004 require all nuclear facilities to have a decommissioning strategy from the design phase. Dockyard radiochemistry laboratories handle fission products and activation products from submarine reactor samples; failure to design for decommissioning creates disproportionate waste volumes and worker dose during end-of-life operations. The requirement ensures ALARP dose during decommissioning and prevents creation of legacy waste liabilities.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; decommissioning; session-238">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:STK-NEEDS-010" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-NEEDS-010">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL implement physical protection measures sufficient to prevent unauthorised access to, or removal of, nuclear materials held within the facility, in accordance with Nuclear Industries Security Regulations 2003 and applicable DNSR security authorisations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Nuclear Industries Security Regulations 2003 and the DNSR Security Authorisation Conditions mandate physical protection of nuclear materials at defence nuclear sites. A radiochemistry laboratory holds accountable nuclear materials including irradiated fuel fragments and fissile material standards. Failure to implement adequate physical protection would breach regulatory requirements and could enable diversion or sabotage.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; security; session-238">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:STK-NEEDS-011" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-NEEDS-011">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL maintain an emergency preparedness and response capability enabling safe shutdown of all active operations and protection of personnel within 15 minutes of a declared site emergency, consistent with the site emergency plan and REPPIR 2019 requirements.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="REPPIR 2019 and Nuclear Site Licence Condition 11 (emergency arrangements) require demonstrated capability to protect workers and the public during radiological emergencies. The 15-minute safe shutdown target derives from site emergency plan requirements for facility-level response before site-level intervention. A radiochemistry laboratory handling open-source radioactivity must be capable of rapidly securing all dispersible materials to prevent escalation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; emergency; session-238">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-001" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-001">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Biological Shielding Structure SHALL attenuate gamma radiation from sources up to 1E14 Bq (Co-60, Cs-137, Ce-144) to achieve a dose rate of less than 7.5 microsieverts per hour at any accessible external surface.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 7.5 µSv/h limit derives from the Ionising Radiations Regulations 2017 (IRR17) designation boundary for controlled areas and ALARP principles. At 1E14 Bq source terms (typical of irradiated fuel samples and activated corrosion products from submarine reactor circuits), the shielding must reduce dose rates to levels permitting continuous operator presence without additional PPE. Co-60 (1.17/1.33 MeV), Cs-137 (0.662 MeV), and Ce-144 (multiple gamma lines) represent the dominant radionuclides in submarine reactor maintenance samples. Failure to meet this threshold would require re-designation of the operator area as a controlled area, severely restricting occupancy and throughput.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-002" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-002">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Master-Slave Manipulator System SHALL provide a minimum payload capacity of 10 kg at full extension with at least 6 degrees of freedom per arm, sufficient to perform dissolution vessel loading, pipetting, and source preparation operations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 10 kg payload at full extension reflects the combined weight of dissolution vessels (stainless steel, ~3 kg) plus sample material and acid reagent loads during in-cell chemical processing. Six degrees of freedom per arm is the minimum required for the dexterous positioning needed in dissolution vessel loading, quantitative pipetting, and source preparation within the constrained hot cell geometry. Lower payload or fewer DOF would necessitate redesigning cell layout or accepting reduced operational capability for high-activity sample handling.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-003" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-003">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Lead Glass Shielding Windows SHALL maintain optical transmission of at least 80% in the visible spectrum (400-700 nm) after 10 years of continuous exposure to a gamma dose rate of 1 Gy/h at the hot face.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Operators require direct visual observation of in-cell operations to guide manipulator movements safely. 80% visible transmission after 10 years at 1 Gy/h represents the radiation-induced browning threshold below which operators report significant difficulty performing fine manipulative tasks. The 10-year design life aligns with the expected hot cell refurbishment cycle at UK naval dockyards. Cerium-stabilised lead glass resists radiation browning but still degrades; this requirement ensures adequate visual acuity throughout the service interval.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-004" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-004">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The In-Cell Ventilation Extract System SHALL maintain a minimum negative pressure differential of 50 Pa between the hot cell interior and the adjacent operator area during all normal operating conditions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 50 Pa negative pressure differential is the minimum required to ensure inward airflow through any breach in the cell containment boundary, preventing outward migration of radioactive particulates and gases to the operator area. This value derives from nuclear industry standard practice for hot cells handling high-activity open sources (IAEA Safety Guide SSG-43) and ensures containment integrity even during transient events such as transfer port operations or manipulator boot changes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-005" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-005">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The In-Cell Ventilation Extract System SHALL incorporate dual-stage HEPA filtration achieving a combined decontamination factor of at least 1E6 for particulate radioactive aerosols at the most penetrating particle size (0.3 microns).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="A combined decontamination factor of 1E6 ensures that airborne radioactive particulates from high-activity dissolution operations (source terms up to 1E14 Bq) are reduced to below derived air concentration limits before discharge to the building extract system. Dual-stage filtration provides defence in depth — a single HEPA filter achieves ~1E3 DF, but the second stage ensures continued containment if the first stage develops a pinhole or is challenged by acid aerosol degradation. Testing at 0.3 microns (most penetrating particle size) provides worst-case assurance per BS EN 1822.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-006" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-006">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Sample Transfer Port System SHALL incorporate mechanical interlocks preventing simultaneous opening of the inner cell door and outer face door on any transfer port.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Simultaneous opening of inner and outer transfer port doors would create a direct pathway between the high-activity cell interior and the operator area, potentially exposing operators to lethal dose rates. Mechanical interlocks (as opposed to electrical-only) provide a passive safety barrier that cannot be defeated by control system failure, power loss, or software error. This is a nuclear safety class requirement consistent with defence-in-depth principles for engineered barriers in ONR Safety Assessment Principles (SAP EKP.3).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-007" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-007">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The In-Cell Dissolution and Chemical Processing Equipment SHALL include at least one dissolution vessel constructed from Hastelloy C-276 or equivalent corrosion-resistant alloy, with a working volume of 1 to 5 litres and capable of operating with 8-12M nitric acid at temperatures up to 120 degrees Celsius.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Hastelloy C-276 provides resistance to both oxidising (nitric acid) and reducing environments encountered in radiochemical dissolution of irradiated fuel and activated metals. The 1-5 litre working volume balances batch size for dockyard sample throughput (typically 0.5-2g dissolved per batch) with minimising the quantity of radioactive acid waste generated. The 120°C/8-12M HNO3 operating envelope covers the dissolution conditions required for uranium oxide fuel, stainless steel activation products, and zircaloy cladding encountered in submarine reactor maintenance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-008" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-008">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The In-Cell Radiation Monitoring Instrumentation SHALL include at least two independent criticality incident detection channels, each providing gamma and neutron detection with an alarm response time of less than 500 milliseconds from onset of a criticality excursion.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Nuclear dockyard radiochemistry laboratories handle fissile materials (enriched uranium, potentially plutonium from fuel examinations), creating a non-zero criticality risk during dissolution operations. Two independent channels provide the minimum redundancy for a safety-critical detection function — no single failure can defeat the alarm capability. The 500 ms response time is driven by the need to trigger evacuation before occupational dose from a criticality excursion exceeds emergency reference levels. Both gamma and neutron detection are required because the relative emissions vary with the type of excursion.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-009" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-009">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Cell Decontamination System SHALL be capable of reducing surface contamination levels on cell interior surfaces to below 4 Bq/cm2 alpha and 40 Bq/cm2 beta-gamma within 8 hours of decontamination operation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 4 Bq/cm2 alpha and 40 Bq/cm2 beta-gamma surface contamination clearance levels are derived from IRR17 Schedule 7 for surfaces that may be accessed during maintenance. The 8-hour decontamination time window aligns with a single shift, enabling cell maintenance to begin the following shift. Inability to decontaminate to these levels would require all cell maintenance to be performed remotely, significantly increasing cost and duration of hot cell refurbishment campaigns.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-010" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-010">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The In-Cell Ventilation Extract System SHALL incorporate activated carbon iodine adsorbers achieving a minimum decontamination factor of 1000 for elemental iodine and methyl iodide at the maximum cell operating temperature of 40 degrees Celsius and 70% relative humidity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Iodine-131 and other radioiodine isotopes are volatile fission products released during fuel dissolution. Methyl iodide is particularly challenging as it penetrates standard HEPA filters. A DF of 1000 ensures iodine discharges remain within site authorisation limits even during dissolution campaigns. The 40°C/70% RH conditions represent worst-case performance for activated carbon and drive the specification of impregnated (TEDA or KI) carbon beds rather than plain activated carbon.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-011" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-011">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="When the In-Cell Ventilation Extract System is not maintaining the required negative pressure differential, the Sample Transfer Port System SHALL prevent opening of any transfer port and the cell access door SHALL remain locked.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Loss of negative pressure differential means the containment barrier is compromised. Locking transfer ports and cell access doors prevents any action that could release contamination into the operator area during this abnormal condition. This is a defence-in-depth measure ensuring that ventilation system failure does not cascade into a contamination event. The EARS 'When' trigger pattern ensures the interlock is explicitly linked to the abnormal condition and is testable.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-012" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-012">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Active Effluent Storage Tanks SHALL operate in fill-hold-sample-transfer batch mode with a minimum hold time of 72 hours to allow decay of short-lived radionuclides before transfer to the treatment circuit.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Fill-hold-sample-transfer batch mode is mandated by Environment Agency discharge authorisation conditions for nuclear licensed sites. The minimum 24-hour hold time allows radioactive decay of short-lived isotopes and provides the time window for sampling, analysis, and formal authorisation before any discharge to the environment. A single-pass flow-through system would not permit pre-discharge verification, creating unacceptable environmental risk.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-014" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-014">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Evaporation and Concentration Unit SHALL achieve a volume reduction factor of at least 20:1 on neutralised effluent while maintaining condensate total alpha activity below 0.05 Bq/L and total beta activity below 0.5 Bq/L.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="A 20:1 volume reduction factor minimises the volume of radioactive concentrate requiring long-term storage or disposal as intermediate-level waste. This ratio is achievable with forced-circulation evaporators for typical dockyard effluent compositions (predominantly nitric acid with dissolved salts). Lower VRF would increase ILW drum production rates and overwhelm the interim waste store capacity within the facility design life.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-015" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-015">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Ion Exchange Treatment Columns SHALL achieve a decontamination factor of at least 100 for Cs-137 and at least 50 for Sr-90 per column, with online gamma monitors at each column outlet detecting breakthrough within 60 seconds of the effluent activity exceeding 10% of the column inlet activity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="A DF of 100 for Cs-137 by ion exchange polishing reduces the residual activity in treated effluent to levels well below site discharge authorisation limits for this dominant fission product. Cs-137 is poorly removed by evaporation alone due to its volatile chloride form, making ion exchange the critical polishing step. The requirement covers both Cs-selective zeolites and mixed-bed resins depending on the treatment regime.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-016" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-016">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Discharge Authorisation and Control System SHALL close the discharge isolation valve within 5 seconds of the Effluent Monitoring and Sampling Station detecting effluent activity exceeding 10% of any individual radionuclide monthly discharge authorisation limit, and the safety function SHALL be rated to SIL 2 in accordance with BS EN 61511.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 5-second closure time limits the volume of out-of-specification effluent that could be discharged if the monitoring system detects an exceedance during authorised discharge. At typical discharge flow rates (1-5 m3/h), 5 seconds limits the uncommitted volume to less than 7 litres, a recoverable quantity. Slower closure would risk a notifiable environmental incident.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-017" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-017">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Active Drain Collection System SHALL provide double containment for all pipework carrying radioactive liquid effluent, with leak detection sensors in the annular space capable of detecting a leak of 0.5 litres or greater within 15 minutes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Double containment for active drain pipework is required by ONR SAPs (ECV.1) for pipework carrying radioactive liquids in nuclear facilities. A leak in single-wall pipework could contaminate building voids, creating a significant decommissioning liability and potential groundwater contamination pathway. Double containment with leak detection provides early warning and prevents uncontrolled release to the environment.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-018" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-018">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Neutralisation and Chemical Dosing Plant SHALL adjust the pH of batch effluent transfers to between 7.0 and 9.0 with a control accuracy of plus or minus 0.3 pH units, using triple-redundant inline pH probes with automatic changeover on probe failure.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The pH 6-9 range is required to protect downstream ion exchange resins from acid degradation and to ensure optimal performance of the evaporator (acidic feeds cause excessive corrosion of heat transfer surfaces). The range also meets Environment Agency discharge consent pH limits for the receiving watercourse. Neutralisation before treatment extends equipment life and improves decontamination factor consistency.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-019" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-019">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Effluent Monitoring and Sampling Station SHALL provide continuous online measurement of gross alpha activity with a minimum detectable activity of 0.02 Bq/L and gross beta activity with a minimum detectable activity of 0.2 Bq/L in treated effluent, with measurement cycle time not exceeding 30 minutes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Continuous online measurement of gross alpha/beta activity provides real-time verification that each treatment stage is performing to specification before effluent progresses to the next stage. Without continuous monitoring, a treatment plant upset could go undetected until the final batch sample is analysed, potentially filling downstream tanks with inadequately treated effluent. This is a condition of the site discharge authorisation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-020" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-020">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Concentrate and Sludge Handling System SHALL fill, weigh, and seal 200-litre stainless steel drums to within 2 kg of target fill weight, and the filled drum surface dose rate SHALL not exceed 2 mSv/h at contact, all operations performed remotely from a shielded control position.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="200-litre stainless steel drums are the standard UK nuclear industry waste container for intermediate-level waste concentrates, compatible with waste acceptance criteria for interim storage and eventual geological disposal. Automated filling, weighing, and sealing minimises operator dose from handling concentrated radioactive waste and ensures consistent, traceable waste package production.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-021" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-021">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Evaporation and Concentration Unit SHALL operate at sub-atmospheric pressure between 20 kPa and 80 kPa absolute to maintain boiling temperature below 95 degrees Celsius, limiting volatilisation of ruthenium tetroxide and iodine species to less than 0.1% of feed inventory per batch.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Sub-atmospheric operation (20-50 kPa) lowers the boiling point of the effluent, reducing corrosion rates on heat transfer surfaces and minimising the volatilisation of radioactive species such as ruthenium tetroxide. This pressure range is standard for nuclear effluent evaporators and balances energy efficiency against the mechanical complexity of maintaining vacuum on a radioactive system. Higher pressures would increase Ru-106 carryover into the distillate.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-022" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-022">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Discharge Authorisation and Control System SHALL maintain cumulative discharge records for each radionuclide specified in the Environmental Agency permit, calculating running daily, monthly, and annual totals against permit limits, and SHALL prevent discharge when any cumulative total exceeds 80% of the corresponding permit limit period.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Environment Agency discharge authorisations for nuclear licensed sites impose annual limits on the cumulative activity of specific radionuclides discharged. Real-time cumulative tracking ensures the operator can manage discharges within these limits and avoid breaching conditions that would constitute a regulatory offence. The system must track by radionuclide because different isotopes have different authorised limits.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-023" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-023">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Active Effluent Storage Tanks SHALL be housed within a secondary containment bund constructed of impermeable concrete with acid-resistant coating, sized to contain at least 110% of the volume of the largest single tank, with bund leak detection and sump pump to return any spill to the treatment circuit.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Secondary containment bunding is a legal requirement under the Environmental Permitting Regulations for tanks containing hazardous radioactive liquids. The bund must retain the full contents of the largest tank plus 10% (standard UK nuclear industry sizing) to prevent uncontrolled release to the environment in the event of catastrophic tank failure. Concrete construction with acid-resistant lining withstands the nitric acid-based effluent composition.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-024" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-024">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Supply Air Handling Unit SHALL deliver conditioned supply air at a minimum flow rate of 5000 m3/h to maintain room air change rates of at least 6 air changes per hour in all active laboratory areas.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 5000 m3/h supply air flow rate is derived from the sum of extract rates from all active areas (hot cells, fume cupboards, gloveboxes) plus building leakage, sized to maintain the required pressure cascade. The supply system must deliver slightly less air than the extract system removes, creating the net inward flow that prevents contamination escape. Conditioned air (temperature, humidity, filtration) protects sensitive analytical instruments and ensures consistent laboratory operating conditions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-025" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-025">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Active Area Extract System SHALL incorporate duty and standby extract fans with automatic changeover, achieving full extract flow restoration within 30 seconds of duty fan failure.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Duty/standby configuration with automatic changeover ensures continuous extract ventilation even during fan failure, which is critical because loss of extract would collapse the pressure cascade and compromise containment of radioactive materials across all active areas. The automatic changeover must complete within seconds to prevent transient positive pressurisation. This is a nuclear safety class requirement — ONR expects high availability for containment ventilation systems.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-026" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-026">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The HEPA Filtration Bank SHALL be designed for in-situ DOP or PAO aerosol challenge testing of each HEPA filter stage without interrupting the extract airflow to the remaining stages.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="In-situ DOP/PAO testing verifies that each individual HEPA filter and its housing seal achieve the rated efficiency after installation. Factory-tested filters can be damaged during transport, installation, or by in-service degradation from acid fumes. Without in-situ testing capability, filter integrity cannot be verified without removal, which would release the contained contamination. This is a standard requirement for nuclear HEPA installations per BS EN ISO 29463 and ASME N510.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-027" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-027">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Pressure Cascade Control System SHALL maintain the following pressure hierarchy: corridors at ambient, non-active laboratories at minus 10 Pa, active laboratories at minus 30 Pa, and fume cupboard interiors at minus 80 Pa minimum, all relative to external atmospheric pressure.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The pressure cascade hierarchy ensures that air always flows from areas of lower contamination potential towards areas of higher contamination potential. Corridors at ambient, general labs at -15 Pa, active labs at -30 Pa, fume cupboards at -50 Pa, and hot cells at -75 Pa creates a progressive containment gradient. These values are consistent with IAEA guidance on ventilation for nuclear facilities and UK nuclear industry good practice. Failure to maintain the cascade could result in cross-contamination between zones.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-028" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-028">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Iodine Adsorption Unit SHALL achieve a minimum decontamination factor of 100 for methyl iodide (CH3I) at inlet conditions of 30 degrees C and 70% relative humidity with a maximum pressure drop of 500 Pa across the adsorber bed.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Methyl iodide is the most challenging form of radioiodine to remove from ventilation exhaust. A DF of 1000 at the CH3I challenge concentration ensures that the building discharge meets environmental authorisation limits for I-131 during dissolution campaigns when volatile iodine is released. TEDA-impregnated activated carbon achieves this DF when fresh but performance degrades with humidity and temperature — the requirement therefore drives bed sizing and replacement frequency.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-029" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-029">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Stack Monitoring Instrumentation SHALL detect a step increase in particulate alpha activity from background to 10% of the derived air concentration limit within 60 seconds and trigger an audible and visual alarm at the ventilation control panel and the Radiation Protection office.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Stack monitoring must detect abnormal releases rapidly enough to trigger automatic extract system shutdown before cumulative discharge exceeds daily authorised limits. The sensitivity threshold for particulate alpha must be low enough to detect a single HEPA filter breach during normal background conditions. Step-change detection capability is specifically required because a gradual increase could indicate filter degradation while a step indicates acute failure.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-030" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-030">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Ventilation Discharge Stack SHALL have a minimum effective height of 20 metres and an exit velocity of at least 10 m/s to achieve adequate atmospheric dispersion such that ground-level concentrations at the site boundary do not exceed 1% of the derived air concentration limit under worst-case meteorological conditions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 20-metre effective stack height ensures adequate atmospheric dispersion of discharged radionuclides to reduce ground-level concentrations at the site boundary below annual dose constraints for members of the public. Exit velocity specification prevents rain ingress and ensures thermal buoyancy enhances the effective release height. These parameters are derived from atmospheric dispersion modelling (Gaussian plume model, R-91 methodology) specific to the dockyard's coastal meteorology and proximity to public areas.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-031" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-031">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Area Gamma Dose Rate Monitoring Network SHALL provide continuous gamma dose rate measurement in all occupied and controlled areas of the laboratory, with at least one detector per active laboratory zone, one per hot cell operating position, and one per waste handling area, using ionisation chamber detectors for the range 0.1 microsievert/h to 10 sievert/h.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IRR17 Regulation 19 requires adequate monitoring of dose rates in controlled and supervised areas. The detector range of 0.1 μSv/h to 10 Sv/h covers normal background through criticality-event levels. One detector per zone ensures no spatial gaps in coverage; ionisation chambers are chosen for energy-independent response and stability in mixed radiation fields typical of radiochemistry facilities handling fission and activation products.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radpro; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-032" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-032">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Area Gamma Dose Rate Monitoring Network SHALL trigger a local audible and visual alarm when the dose rate at any detector location exceeds 7.5 microsieverts per hour, and SHALL trigger a facility evacuation alarm when any detector exceeds 2 millisieverts per hour, with alarm actuation within 5 seconds of the dose rate exceeding the threshold.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 7.5 μSv/h alarm threshold is derived from the IRR17 instantaneous dose rate investigation level (3/8 of the 20 mSv annual limit pro-rated to working hours). The 2 mSv/h evacuation threshold reflects immediate danger levels per PHE emergency reference levels. The 5-second actuation time ensures personnel receive warning before accumulating a significant fraction of the investigation dose at the alarm threshold.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radpro; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-033" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-033">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Airborne Contamination Monitoring System SHALL provide continuous measurement of airborne alpha particulate activity concentration with a minimum detectable concentration of 0.02 DAC and beta particulate activity concentration with a minimum detectable concentration of 0.1 DAC in each active laboratory zone, with a measurement cycle time not exceeding 10 minutes and automatic radon/thoron background compensation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Continuous airborne monitoring with radon compensation is essential in a radiochemistry laboratory where dissolution, evaporation, and separation of irradiated materials can release volatile fission products and actinide aerosols. The 0.02 DAC alpha sensitivity detects intake-significant concentrations before committed effective dose reaches investigation levels. The 10-minute cycle balances statistical counting accuracy with response time for transient releases from fume cupboards or hot cell breaches.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radpro; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-034" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-034">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Area Gamma Dose Rate Monitoring Network SHALL provide continuous gamma dose rate measurement in all occupied and controlled areas.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Continuous area gamma monitoring is required by IRR17 for controlled and supervised areas in nuclear facilities. Measurement in all areas handling unsealed radioactive sources provides early warning of source misplacement, contamination spread, or shielding failure. The monitoring network feeds the centralised alarm system, enabling rapid operational response. Coverage of all areas (not just the highest-risk ones) ensures that anomalies in lower-activity laboratories are detected before they escalate.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="duplicate-of-SUB-REQS-031; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-035" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-035">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Criticality Warning System SHALL employ a minimum of three independent gamma and neutron detector assemblies per monitored zone, with 2-out-of-3 coincidence voting logic, activating evacuation sounders and visual beacons throughout the facility within 500 milliseconds of a criticality excursion exceeding 20 mGy/h gamma coincident with a tenfold increase above neutron background.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="NRC Regulatory Guide 3.71 and UK ONR NS-TAST-GD-038 require criticality warning systems with redundant detection and voting logic to prevent false alarms while ensuring prompt evacuation. The 2-out-of-3 coincidence logic provides single-failure tolerance. The 500 ms actuation time derives from the dose rate expected during a nuclear criticality excursion — at the threshold of 20 mGy/h with potential for rapid escalation to lethal levels, sub-second response is necessary to initiate evacuation before personnel receive significant doses. Coincident gamma and neutron detection discriminates criticality events from non-criticality gamma sources.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radpro; criticality; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-036" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-036">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Criticality Warning System SHALL be electrically and physically independent of the Area Gamma Dose Rate Monitoring Network, with a dedicated uninterruptible power supply providing at least 8 hours of battery backup, dedicated signal cabling, and self-test capability that verifies detector response and alarm circuit integrity at intervals not exceeding 24 hours.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Independence from the area monitoring network is a nuclear safety requirement (ONR Safety Assessment Principle ECS.1) ensuring that common-cause failure of the general monitoring system cannot simultaneously disable the criticality warning function. The 8-hour UPS capacity covers the maximum credible site power outage duration for a nuclear-licensed site per ONR expectations. The 24-hour self-test interval ensures latent faults are detected within one working day.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radpro; criticality; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-037" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-037">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Personal Dosimetry Management System SHALL issue electronic personal dosemeters to all workers entering controlled areas, providing real-time dose rate display with 10% accuracy in the range 1 microsievert/h to 1 sievert/h, cumulative dose display, and audible alarm at preset dose thresholds of 0.5 mSv (investigation) and 2 mSv (intervention) per entry, with automatic data upload to the central dose recording system on exit from the controlled area.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Electronic personal dosemeters provide real-time dose awareness that passive dosemeters (TLDs/OSLDs) cannot, enabling workers to manage their own dose budgets during complex radiochemistry operations. The 0.5 mSv investigation and 2 mSv intervention alarm thresholds are derived from IRR17 dose constraints and ALARP principles — at 10% of the 20 mSv annual limit per entry, an alarm ensures operational review before significant dose accumulation. Automatic upload on exit eliminates manual transcription errors in dose records and enables immediate access control decisions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radpro; dosimetry; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-038" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-038">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Surface Contamination Monitoring Equipment SHALL include hand and clothing monitors at every exit from a controlled area, with detection sensitivity of less than 0.4 Bq/cm2 for alpha emitters and less than 4 Bq/cm2 for beta emitters, and a monitoring cycle time not exceeding 30 seconds, preventing exit gate release if contamination exceeds clearance levels.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Exit monitoring prevents spread of contamination beyond controlled areas, a fundamental ALARP measure under IRR17 Regulation 8. The 0.4 Bq/cm² alpha and 4 Bq/cm² beta clearance levels align with UK nuclear industry standard clearance values derived from IAEA GSR Part 3. The 30-second cycle time balances detection sensitivity with personnel throughput at shift change — a longer cycle would cause queuing and incentivise bypass. Gate interlock ensures no unmonitored exit.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radpro; contamination; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-039" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-039">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radiological Access Control System SHALL prevent entry to any controlled area by personnel whose cumulative dose recorded in the Personal Dosimetry Management System exceeds 10 mSv in the current calendar year, and SHALL maintain a time-stamped entry and exit log for all personnel with dose readings at each transition, accessible to the Radiation Protection Adviser within 60 seconds of query.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Automated dose-based access control prevents administrative errors that could allow overexposed personnel to re-enter controlled areas. The 10 mSv calendar-year threshold is the UK nuclear industry site dose constraint (half the IRR17 20 mSv annual limit), reflecting ALARP optimisation for a facility where multiple entries are routine. The 60-second query response time supports the Radiation Protection Adviser's statutory duty to investigate abnormal exposures promptly.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radpro; access-control; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-040" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-040">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Centralised Radiation Monitoring Display and Alarm System SHALL store all dose rate, airborne activity, contamination survey, and personal dose records for a minimum of 30 years with 1-minute time resolution for continuous monitors and per-event resolution for alarms, supporting retrieval of any 24-hour period within 5 minutes of query.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 30-year retention period satisfies IRR17 Regulation 21 dose record retention requirements and supports epidemiological studies. One-minute time resolution for continuous monitors enables dose reconstruction for incident investigation — coarser resolution would introduce unacceptable uncertainty in worker dose assignment during short-duration events such as hot cell window breaches. The 5-minute retrieval time supports operational and regulatory queries without specialist database intervention.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radpro; monitoring; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-041" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-041">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Waste Sorting and Segregation Facility SHALL categorise all solid radioactive waste into VLLW, LLW compactable, LLW non-compactable, and ILW streams within 24 hours of receipt, using hand-held contamination and dose rate instruments to confirm categorisation at the point of sorting.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Early categorisation into VLLW/LLW/ILW streams is essential because each waste category has fundamentally different conditioning, packaging, storage, and disposal routes under the UK radioactive waste management framework. The 24-hour sorting window prevents accumulation of unsegregated waste in the sorting facility, which would complicate dose management and create a fire load. Hand-held instrument confirmation at the point of sorting provides a defence against mis-categorisation, which could result in a package exceeding its Waste Acceptance Criteria for the intended disposal route.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-042" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-042">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Non-Destructive Assay System SHALL achieve a measurement uncertainty of less than 20% at 2-sigma confidence for all gamma-emitting radionuclides contributing more than 1% of total package activity, using segmented gamma scanning with a minimum of 12 axial segments and full drum rotation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 20% measurement uncertainty at 2-sigma is the maximum acceptable for UK radioactive waste Waste Acceptance Criteria compliance (per LLWR WAC and RWM guidance). Segmented gamma scanning with 12 axial segments corrects for non-uniform activity distribution within drums, which is common for radiochemistry laboratory waste containing discrete high-activity items (filters, glassware, PPE). Without segmentation, matrix and self-absorption effects can cause underestimates exceeding a factor of 3 for heterogeneous waste.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-043" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-043">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The LLW Compaction and Packaging System SHALL compact standard 200-litre mild steel drums to a puck height of no more than 120 mm using a minimum compaction force of 1500 tonnes, achieving a volume reduction factor of at least 5:1 for compactable LLW.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 5:1 volume reduction factor is the minimum needed to achieve economic LLW disposal given LLWR container charges and the projected 30-year waste arisings. The 120 mm puck height ensures compacted pucks fit within half-height ISO containers (HHISO) in a single layer, maximising container utilisation. The 1500-tonne compaction force is specified because radiochemistry laboratory LLW includes metal items (tools, small vessels) requiring high force to achieve target volume reduction.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-044" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-044">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The ILW Conditioning and Encapsulation Plant SHALL immobilise Intermediate Level Waste within 500-litre stainless steel drums using an OPC/BFS grout formulation conforming to the RWM Letter of Compliance, achieving a minimum 28-day compressive strength of 4 MPa and a waste-to-grout volume ratio not exceeding 30%.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="OPC/BFS grout is the UK reference ILW immobilisation matrix, with decades of characterisation data supporting the RWM generic Disposal System Safety Case. The 4 MPa 28-day compressive strength ensures structural integrity for handling, transport, and long-term geological disposal. The 30% waste-to-grout ratio limit ensures sufficient grout matrix to encapsulate and immobilise radionuclides while maintaining pourability during the conditioning process. Exceeding this ratio risks incomplete encapsulation and reduced chemical containment performance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-045" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-045">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Interim Radioactive Waste Store SHALL provide segregated, shielded storage capacity for a minimum of 30 years of facility waste arisings, with the ILW storage area maintaining surface dose rates below 2 mSv/h at the package handling face and designed for 3-high stacking of 500-litre drums on seismically restrained storage racks.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 30-year storage capacity reflects the minimum period before a UK Geological Disposal Facility is expected to accept ILW from smaller producers. The 2 mSv/h surface dose rate limit at the handling face ensures manual handling operations remain within ALARP dose budgets for store operators (derived from a 10 mSv/year constraint with estimated 2500 hours of access). Seismic restraint for 3-high stacking is required by ONR expectations for ILW stores in seismic hazard zone 1.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-046" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-046">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Waste Tracking and Records System SHALL maintain a complete cradle-to-grave record for every waste package for a minimum of 150 years from the date of package creation, with each record including waste description, generator, radionuclide inventory, conditioning method, assay results, storage location history, and disposal route.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 150-year record retention period covers the anticipated operational period of a UK Geological Disposal Facility plus closure monitoring. Cradle-to-grave traceability is a condition of the RWM Letter of Compliance and a regulatory expectation under EPR16 environmental permits. The specified data fields constitute the minimum dataset required by the UK Radioactive Waste Inventory and LLWR/GDF Waste Acceptance Criteria, enabling disposal route determination and package retrievability.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-047" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-047">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Non-Destructive Assay System SHALL quantify fissile material content in each waste package using passive neutron coincidence counting, with a minimum detectable mass of 0.1 g Pu-239 equivalent, to verify compliance with the transport and storage criticality safety limits.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Fissile material quantification is a nuclear safety requirement — waste packages exceeding criticality safety limits for transport (per IAEA SSR-6) or storage (per facility-specific criticality safety assessment) must be identified before entering the disposal pathway. The 0.1 g Pu-239 equivalent detection limit is derived from the criticality safety mass limit for the intended storage geometry divided by the number of packages in a single storage module, providing a margin of safety factor 10 against inadvertent criticality from accumulation of undetected fissile material.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-048" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-048">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Spent Sealed Source Management System SHALL maintain a real-time inventory of all sealed radioactive sources, schedule and record wipe tests at intervals not exceeding 26 weeks per IRR17, and automatically flag any source exceeding its certificate expiry date or exhibiting leakage above 200 Bq removable contamination.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IRR17 Regulation 27 requires holders of sealed sources to maintain adequate records and conduct regular leak testing. The 26-week wipe test interval is the maximum permitted under IRR17 for high-activity sealed sources used in calibration and quality control. Automatic flagging of expired certificates and leaking sources prevents continued use of compromised sources, which could cause facility contamination and worker dose. A real-time inventory supports the statutory obligation to account for all sources at any time.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-049" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-049">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="While an ILW drum is in the 28-day curing period, the ILW Conditioning and Encapsulation Plant SHALL continuously monitor the grout centre-line temperature and SHALL trigger an alarm if the temperature exceeds 80 degrees Celsius, indicating potential thermal cracking.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Exothermic hydration of cementitious grout in ILW drums can generate significant heat, particularly with high waste loadings. Centre-line temperatures exceeding 80°C cause thermal cracking that compromises the wasteform's long-term radionuclide containment performance, as validated by RWM thermal modelling studies. Continuous monitoring during the 28-day curing period ensures early detection of thermal excursions, enabling intervention (cooling or rejection) before irreversible damage occurs to the wasteform matrix.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-050" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-050">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Sample Reception Bay SHALL measure the dose rate of every incoming sample container at 100mm distance within 60 seconds of receipt, using a calibrated instrument with a measurement range of 0.1 microsieverts per hour to 10 millisieverts per hour.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Dose rate measurement at receipt is required for radiation protection of laboratory personnel and for regulatory compliance with IRR17 Regulation 8 (prior risk assessment). The 0.1 µSv/h to 10 mSv/h range covers the full spectrum from environmental background samples to activated reactor components. The 60-second time limit prevents bottlenecks during peak campaign intake.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-051" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-051">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="When a submarine reactor maintenance campaign is in progress, the Sample Receipt and Preparation Laboratory SHALL process a minimum of 80 samples per week from receipt through to prepared aliquots ready for analysis, without exceeding a 48-hour turnaround from receipt to delivery of prepared samples to the analytical laboratories.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Submarine reactor maintenance campaigns generate the laboratory's peak analytical demand. The 80 samples/week throughput derives from the typical defuelling/refuelling campaign schedule where coolant, swab, and structural samples must be processed within the maintenance window. The 48-hour turnaround is driven by the reactor maintenance programme's critical path — delays in radiochemistry results stall the defuelling sequence.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-052" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-052">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Sample Reception Bay SHALL measure the dose rate of every incoming sample container at 100mm distance within 60 seconds of receipt, using a calibrated instrument with a measurement range of 0.1 microsieverts per hour to 10 millisieverts per hour.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Dose rate measurement at sample receipt is required by the laboratory radiation protection programme to classify incoming samples, determine appropriate handling procedures, and verify that consignment documentation is accurate. The 100mm measurement distance is a standard reference geometry that provides a reproducible result for comparison against laboratory handling limits and transport regulations (IAEA SSR-6).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; sample-prep; session-232; duplicate-of-SUB-REQS-050">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-053" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-053">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="When a submarine reactor maintenance campaign is in progress, the Sample Receipt and Preparation Laboratory SHALL process a minimum of 80 samples per week from receipt through to prepared aliquots ready for analysis, without exceeding a 48-hour turnaround from receipt to delivery of prepared samples to the analytical laboratories.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Submarine reactor maintenance campaigns generate high sample volumes over short periods — typically 60-100 primary coolant, resin, and swab samples per week. The 48-hour turnaround ensures analytical results are available within the maintenance planning cycle, preventing costly reactor maintenance hold points while waiting for radiochemical clearance data.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; sample-prep; session-232; duplicate-of-SUB-REQS-051">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-054" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-054">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Sample Logging and Labelling Station SHALL assign a unique barcode identifier to every sample within 5 minutes of reception and create a LIMS record capturing: sample origin, collection date and time, requested analyses, estimated radionuclide inventory, measured dose rate, sample matrix type, and chain-of-custody signoff.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Unique barcode identification at point of receipt establishes chain of custody required for ISO 17025 accreditation and legal defensibility of analytical results used in safety case and discharge consent evidence. The 5-minute registration window prevents sample queuing during high-intake periods.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-055" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-055">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Sample Preparation Fume Cupboard SHALL maintain a minimum face velocity of 0.5 metres per second across the working aperture at all sash heights up to 500mm, as measured at any point across the aperture face.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 0.5 m/s face velocity is mandated by nuclear site licence conditions and IAEA Safety Guide RS-G-1.7 for work with unsealed radioactive sources. Maintaining this velocity at all sash positions up to the maximum 500mm working height ensures containment during routine operations. Failure to meet this threshold would require cessation of radiochemistry work under the site's ALARP demonstration.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-056" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-056">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Analytical Balance and Gravimetric Station SHALL provide a readability of 0.01 mg with a linearity of plus or minus 0.02 mg, calibrated against UKAS-traceable mass standards, and SHALL automatically record each weighing result to the LIMS with timestamp and environmental conditions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gravimetric measurements directly enter activity concentration calculations (Bq/g), so balance accuracy propagates linearly into reported results. The 0.01mg readability and ±0.02mg linearity are required to keep weighing uncertainty below 1% for typical 20mg-100mg sample aliquots. UKAS traceability is mandatory for ISO 17025 accreditation. Automatic LIMS transfer eliminates transcription errors in the measurement chain.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-057" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-057">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Sample Storage Refrigerator Array SHALL maintain refrigerator compartments at 2 to 8 degrees Celsius and freezer compartments at minus 20 degrees Celsius plus or minus 5 degrees, with continuous temperature logging at intervals of no more than 15 minutes and automatic alarm on excursion beyond these limits.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Aqueous environmental and biological samples degrade through bacterial action, radiolytic decomposition, and volatilisation if not stored at controlled temperatures. The 2-8°C refrigerator range preserves sample integrity for standard matrices. The -20°C freezer accommodates biological tissue samples from the dockyard's environmental monitoring programme. Temperature excursion alarms prevent undetected loss of sample integrity that would invalidate analytical results.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-058" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-058">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Sample Drying and Ashing Oven SHALL exhaust all fumes and particulate emissions through a HEPA-filtered duct connection to the active area extract system, with an over-temperature safety trip that isolates the heating elements at 120 degrees Celsius for the drying oven and 950 degrees Celsius for the muffle furnace.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Drying and ashing at high temperatures volatilises tritium, iodine, and caesium from contaminated samples. HEPA filtration of the exhaust prevents these radionuclides entering the general extract ductwork. The over-temperature trip at 600°C protects the HEPA filter media (rated to 250°C) and prevents furnace damage that could release activity from incompletely ashed samples.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-059" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-059">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Contamination Control and Waste Segregation Point SHALL provide surface contamination monitoring instruments capable of detecting 0.4 Bq per square centimetre alpha and 4 Bq per square centimetre beta-gamma on personnel and equipment exiting the controlled area, with audible and visual indication of contamination above these limits.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Surface contamination monitoring at the waste segregation boundary is the primary control preventing spread of activity from active to supervised areas. The 0.4 Bq/cm² alpha and 4 Bq/cm² beta-gamma thresholds correspond to clearance levels in the Radioactive Substances Regulations, below which items can be managed as non-active waste — a significant cost and dose saving compared to solid radioactive waste disposal.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-060" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-060">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Acid Digestion System SHALL dissolve solid radioactive samples including soil, sediment, concrete, and metal swarf in concentrated mineral acids to achieve a minimum dissolution efficiency of 95 percent by mass, with a batch capacity of at least 20 samples for microwave digestion and 6 samples for open-vessel hotplate digestion.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Complete dissolution of solid samples is prerequisite for representative aliquoting and accurate radiochemical analysis. The 95% dissolution efficiency target ensures that refractory matrices (concrete, reactor structural alloys) yield analytically representative solutions. Failure to achieve complete dissolution leads to biased low results for radionuclides locked in undissolved residues, undermining waste characterisation and dose assessment accuracy.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-061" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-061">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Sample Reception Bay SHALL incorporate a shielded pass-through hatch with interlocked inner and outer doors, providing a minimum shielding of 50mm lead equivalent, to prevent direct radiation streaming between the external delivery area and the preparation laboratory during sample transfer.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The shielded pass-through hatch prevents direct radiation streaming between the sample reception area and the laboratory interior, protecting personnel on both sides. The 50mm lead equivalent attenuates gamma radiation from the highest-activity dockyard samples (activated reactor structural specimens up to 10 mSv/h contact) to below the general area dose rate limit. Interlocked doors prevent simultaneous opening which would create an unshielded line of sight.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-062" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-062">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Contamination Control and Waste Segregation Point SHALL route all active liquid waste through a dedicated sump to the Active Drain Collection System, with a sump capacity of at least 50 litres and a high-level alarm at 80 percent capacity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="All active liquid waste from the contamination control area must be captured and routed to the active drain system with no uncontrolled discharge. The 50-litre sump capacity accommodates a worst-case spill volume from a single decontamination operation. The high-level alarm prevents sump overflow that would result in uncontrolled contamination spread and a potential regulatory reportable event.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-063" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-063">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Extraction Chromatography Station SHALL achieve chemical recovery yields of at least 70% for each individual actinide isotope (Pu, Am, Cm, U, Np) separation, verified by yield tracer measurement on every sample batch.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Chemical recovery yield directly determines analytical accuracy for actinide measurements. The 70% minimum ensures that yield corrections remain within the acceptable uncertainty range for regulatory reporting. Below 70%, matrix effects and separation column breakthrough introduce systematic biases that cannot be reliably corrected by yield tracer measurement alone, particularly for Am and Cm where spectral interference with Pu isotopes increases at low yields.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-064" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-064">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Electrodeposition and Source Preparation Unit SHALL produce alpha counting sources with a deposit mass of less than 50 micrograms per square centimetre and diameter uniformity within 5% of the target 20mm deposition area.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Alpha spectrometry resolution depends critically on source thickness. Deposits exceeding 50 µg/cm² cause peak broadening through self-absorption, degrading energy resolution below the 30 keV FWHM needed to resolve Pu-238/Am-241 and Pu-239/Pu-240 peaks. Diameter uniformity within 5% ensures consistent geometry calibration factors across the detector array, which is essential for accurate quantification.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-065" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-065">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radiochemical Separations Laboratory SHALL limit fissile material in any single fume cupboard to a maximum of 15 grams fissile equivalent, with individual sample aliquots not exceeding 5 grams fissile equivalent.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Criticality safety in the radiochemical separations laboratory is governed by the facility criticality safety assessment. The 15g fissile equivalent per fume cupboard and 5g per aliquot limits derive from the assessed safe mass for the laboratory geometry and moderation conditions, providing a margin of safety below the minimum critical mass. Exceeding these limits would invalidate the criticality safety case and require facility shutdown.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-066" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-066">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Glassware Decontamination and Quality Control Bay SHALL verify that all decontaminated glassware has surface activity below 0.4 Bq per square centimetre for alpha emitters and 4 Bq per square centimetre for beta-gamma emitters before return to service.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Reuse of glassware that retains residual contamination above clearance levels would introduce cross-contamination between samples, producing false-positive results. The 0.4 Bq/cm² alpha and 4 Bq/cm² beta-gamma thresholds match the regulatory clearance values and the laboratory's quality system acceptance criteria for decontaminated equipment under ISO 17025.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-067" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-067">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Reagent Storage and Dispensing System SHALL supply only analytical-grade or higher purity reagents with certificates of analysis, and SHALL maintain LIMS-tracked records of reagent identity, batch number, date opened, and expiry date for every reagent in use.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Reagent impurities introduce blank contributions that degrade detection limits for trace-level radionuclide measurements. Analytical-grade or higher purity minimises blank activity, particularly for ICP-MS where elemental impurities in acids cause isobaric interferences. LIMS-tracked batch and expiry records support root-cause investigation when analytical QC flags systematic deviations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-068" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-068">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Active Laboratory Drain and Effluent Segregation System SHALL segregate high-activity laboratory waste streams containing greater than 100 Bq/L total alpha from low-activity rinse water, routing high-activity streams to dedicated AETP collection vessels.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Segregation of high-activity (&gt;100 Bq/L total alpha) waste from low-activity rinse water reduces the volume of Category 3 effluent requiring full treatment, lowering operational costs and dose uptake during treatment. The 100 Bq/L threshold aligns with the site's environmental discharge authorisation categorisation. Mixing high and low streams would require the entire combined volume to be treated as high-activity, overwhelming the treatment plant's ion exchange capacity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-069" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-069">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Tracer and Reference Standard Store SHALL maintain an auditable inventory of all radioactive tracer solutions with individual activity concentrations traceable to national standards (NPL or NIST), reference dates, expanded uncertainties, and remaining volumes updated after each dispensing event.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Radioactive tracers and reference standards provide the metrological foundation for all quantitative measurements. Traceability to NPL or NIST national standards is mandatory for ISO 17025 accreditation and for regulatory acceptance of analytical results. An auditable inventory prevents use of expired or depleted standards, which would introduce systematic measurement bias into reported activity concentrations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-070" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-070">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="While any sash is open beyond the 100mm service access position, each fume cupboard in the Radiochemical Fume Cupboard Array SHALL maintain a face velocity of 0.5 metres per second plus or minus 10% across the full sash opening.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="This EARS 'While' pattern requirement ensures containment is maintained during the most hazardous operational condition — open sash with active radiochemistry in progress. The ±10% tolerance on the 0.5 m/s face velocity accounts for transient fluctuations from door openings and personnel movement while maintaining the minimum containment velocity required by nuclear site licence conditions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-071" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-071">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radiochemical Separations Laboratory SHALL have the capacity to process at least 30 radiochemical separation batches per week across all analytical streams during a submarine reactor maintenance campaign.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 30 separations/week capacity is sized to support the 80 samples/week receipt rate during submarine reactor campaigns (SUB-REQS-051), accounting for the fact that each sample may require 2-3 separate radiochemical procedures for different analyte groups. Insufficient separations throughput would create a bottleneck between sample preparation and measurement, delaying analytical reporting beyond the 48-hour campaign turnaround requirement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-072" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-072">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radiochemical Fume Cupboard Array SHALL incorporate integral drip trays with a minimum capacity of 5 litres per fume cupboard, draining to the active laboratory drain system, and fitted with level sensors alarming to the centralised radiation monitoring system at 50% capacity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Integral drip trays provide secondary containment for spills within the fume cupboard, preventing radioactive liquid from reaching the cupboard base and penetrating joints. The 5-litre capacity contains the maximum credible spill volume from a single beaker (2L) plus margin. Level sensors with LIMS integration trigger alarms before overflow, enabling prompt spill response and maintaining the facility's containment barrier integrity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-073" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-073">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The HPGe Detector Array SHALL achieve a minimum detectable activity of less than 1 Bq for Cs-137 in a 1-litre Marinelli beaker geometry with a 3600-second acquisition time, for all four detectors.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The &lt;1 Bq Cs-137 MDA in a 1L Marinelli geometry at 3600s count time defines the gamma spectrometry system's sensitivity floor. This performance level is required to meet the EA/SEPA environmental monitoring programme detection requirements for liquid and solid waste samples from the dockyard. Failure to achieve this sensitivity would necessitate longer count times, reducing throughput during campaigns, or supplementary measurement by a more expensive technique.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; gamma-spec; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-074" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-074">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Lead Shielding and Sample Chamber Assembly SHALL attenuate the external gamma background by at least a factor of 1000 across the energy range 50-2000 keV, achieving an integral count rate of less than 1 count per second in the 40-2000 keV window with no sample present.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The factor-of-1000 background attenuation determines the achievable minimum detectable activity for all gamma measurements. Without adequate shielding, environmental background (cosmic rays, building materials, neighbouring sources) would dominate the spectrum at low energies, masking low-activity sample peaks. The integral count rate specification (&lt;0.5 cps) ensures the shielding performance is verified as a system, not just by material thickness calculation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; gamma-spec; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-075" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-075">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Gamma Spectrum Analysis and Nuclide Identification Software SHALL automatically identify and quantify all gamma-emitting radionuclides present above the critical level from a library of at least 200 nuclides, applying cascade summing and self-attenuation corrections, and SHALL transfer results to LIMS within 60 seconds of analysis completion.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Automatic nuclide identification from a library of 200+ radionuclides is essential for screening unknown waste and environmental samples from the dockyard, where the radionuclide inventory includes fission products, activation products, and naturally occurring radioactive materials. The 5% activity bias tolerance ensures reported activity concentrations are accurate enough for waste sentencing against disposal facility waste acceptance criteria.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; gamma-spec; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-076" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-076">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The PIPS Alpha Detector Array SHALL achieve an energy resolution of 18 keV FWHM or better at 5.486 MeV (Am-241) for all eight detectors, measured with a certified Am-241 point source at the standard 15mm source-to-detector distance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="18 keV FWHM energy resolution at the Am-241 5.486 MeV peak is the minimum required to resolve closely spaced alpha peaks from Pu-239 (5.157 MeV) and Pu-240 (5.168 MeV) from U-234 (4.776 MeV) and Am-241 in irradiated fuel samples. PIPS detectors routinely achieve 15-20 keV; specifying 18 keV ensures acceptable peak deconvolution accuracy while allowing for in-service degradation over the detector replacement cycle.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; alpha-spec; session-234">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-077" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-077">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Alpha Spectrometry Vacuum Chamber System SHALL achieve a vacuum pressure of less than 10 Pa within 5 minutes of chamber closure and maintain this pressure for the duration of the count period without re-pumping.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Alpha particles have a range of only a few centimetres in air. Vacuum below 10 Pa eliminates air absorption losses that would degrade both detection efficiency and energy resolution. The 10-minute pumpdown time supports the operational throughput requirement for the 24-sample carousel — excessive pumpdown would create a bottleneck in the analysis chain. The specified pressure is achievable with oil-free rotary vane pumps suitable for contaminated environments.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; alpha-spec; session-234">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-078" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-078">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Alpha Source Loading and Sample Changer SHALL accommodate a minimum of 24 source discs per carousel position per detector chamber, with automatic barcode reading of each source disc identifier before counting commences.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 24-source capacity per carousel allows a full batch of prepared sources (typically 8-12 environmental monitoring plus QC sources, blanks, and replicates) to be loaded in a single operation, enabling unattended overnight counting. This minimises operator handling of alpha-contaminated sources and maximises instrument utilisation. The carousel capacity is matched to the throughput of the electrodeposition source preparation unit.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; alpha-spec; session-234">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-079" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-079">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Alpha Spectrum Analysis Software SHALL automatically deconvolve overlapping alpha peaks with energy separations of 13 keV or greater, and SHALL report activity concentrations with combined measurement uncertainties calculated in accordance with GUM methodology, including contributions from counting statistics, detector efficiency, chemical yield, and sample preparation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Overlapping alpha peaks occur frequently in environmental and fuel-related samples where multiple actinides are present. Automated peak deconvolution with energy separation resolution below 25 keV ensures reliable identification and quantification of co-deposited actinides without requiring manual spectrum stripping, which is subjective and error-prone. The software must handle the complex spectra generated by dockyard samples containing mixtures of U, Pu, Am, and Cm isotopes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; alpha-spec; session-234">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-080" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-080">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Alpha MCA and Pulse Processing Electronics SHALL maintain a system dead time of less than 5% at count rates up to 10 counts per second per detector, with automatic dead time correction applied to all spectral data.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="System dead time below 5% at 10 cps ensures that count rate losses from pulse processing do not introduce significant quantification errors for the higher-activity samples encountered in dockyard work. At 5% dead time, the correction factor is small and well-characterised. Higher dead times would require larger corrections with greater uncertainty, degrading the overall measurement uncertainty budget for actinide quantification.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; alpha-spec; session-234">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-081" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-081">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Ultra-Low-Background Liquid Scintillation Counter Array SHALL achieve an instrument background count rate of less than 1.0 CPM in the tritium energy window (0-18.6 keV) with a sealed blank vial in counting position.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Ultra-low background is essential for tritium analysis of environmental samples where activities approach the minimum detectable activity. The instrument background count rate directly determines the MDA — a lower background enables detection of tritium at the levels required by discharge authorisation monitoring and environmental compliance programmes. Standard LSC instruments have backgrounds too high for the sub-Bq/L tritium measurements required near submarine refuelling operations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-082" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-082">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Ultra-Low-Background Liquid Scintillation Counter Array SHALL perform pulse shape analysis alpha/beta discrimination with a misclassification rate of less than 0.5% for both alpha-to-beta and beta-to-alpha spillover when using Ultima Gold AB cocktail.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Pulse shape analysis discriminates between alpha and beta decay events in mixed-nuclide samples, eliminating the need for separate sample preparations for alpha-emitting transuranics (Pu, Am) and beta-emitting nuclides (Sr-90, tritium) in screening analyses. This capability halves sample preparation time for gross activity screening and supports rapid sample categorisation during high-throughput submarine maintenance campaigns.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-083" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-083">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Tritium Distillation and Electrolytic Enrichment System SHALL achieve a minimum tritium enrichment factor of 20 with a deuterium spike recovery of 90% to 110% for each enrichment batch.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Electrolytic enrichment with a minimum 20x concentration factor is required to achieve the detection limits for environmental tritium monitoring mandated by the site discharge authorisation. Background tritium levels in environmental waters near naval dockyards must be measured at levels below 1 Bq/L, which is not achievable by direct LSC measurement alone. The 20x enrichment combined with the ultra-low-background counter achieves the required MDA.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-084" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-084">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Ultra-Low-Background Liquid Scintillation Counter Array SHALL have a combined sample capacity of at least 600 vial positions across all counters, with automated sequential counting without operator intervention.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Combined capacity for unattended counting supports weekend and overnight operation, maximising instrument utilisation for the long count times (typically 4-8 hours per vial) required for low-level tritium and C-14 measurements. The capacity must accommodate the weekly sample throughput including QC vials, backgrounds, and standards without requiring mid-batch reloading.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-085" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-085">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Scintillation Cocktail and Vial Preparation Station SHALL be located within a fume cupboard maintaining a face velocity of 0.5 m/s +/- 10% with the sash at the designated working height.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Scintillation cocktail preparation involves dispensing volatile organic solvents (toluene, xylene-based cocktails) which are both flammable and toxic. Fume cupboard containment with maintained face velocity protects operators from solvent vapour inhalation and provides secondary containment for spillage of tritiated samples. The cocktail mixing process must occur in a controlled environment to prevent chemiluminescence from UV exposure that would generate false counts.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-086" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-086">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The LSC Spectrum Analysis and MDA Calculation Software SHALL calculate minimum detectable activities in accordance with ISO 11929 methodology and report combined measurement uncertainties at the 95% confidence level (k=2).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="MDA calculation using the Currie formulation is the internationally accepted method (ISO 11929) for determining detection capability in radiometric measurements. Automated calculation eliminates transcription errors and ensures consistent, defensible reporting for regulatory submissions. The software must account for counting time, background, quench, and efficiency — all variables specific to each sample measurement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-087" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-087">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Scintillation Cocktail and Vial Preparation Station SHALL provide light-tight dark-adaptation storage for at least 100 prepared counting vials with a minimum storage period of 4 hours before counting.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Dark adaptation (typically 1-4 hours) is required after cocktail mixing to allow chemiluminescence and photoluminescence to decay before counting. Light-tight storage at the preparation station prevents re-excitation. Without adequate dark adaptation, elevated backgrounds would invalidate low-level tritium measurements and waste expensive counting time. The preparation station must integrate dark storage to maintain sample chain of custody.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-088" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-088">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Quadrupole ICP-MS with Collision Reaction Cell SHALL achieve a sensitivity of at least 500 million counts per second per mg/L for U-238 in standard tuning mode and a detection limit of less than 0.1 pg/mL for U-238 in clean acid matrices.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="500 Mcps/ppm sensitivity enables measurement of trace-level actinides (sub-pg/mL) in reactor coolant and environmental samples without pre-concentration steps that would increase sample turnaround time and contamination risk. This sensitivity level is achievable with current quadrupole ICP-MS technology and is required to meet the system-level detection limits specified in SYS-REQS-011.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; icp-ms; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-089" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-089">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Quadrupole ICP-MS with Collision Reaction Cell SHALL resolve the mass 238 (U-238) from mass 239 (Pu-239) interference with an abundance sensitivity of less than 1E-7 at one mass unit separation, using peak-tailing correction algorithms validated against IRMM-085 Pu reference material.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Uranium-238 is present at vastly higher concentrations than plutonium-239 in reactor coolant samples, causing isobaric interference at mass 239 from UH+ molecular ions. Abundance sensitivity of 1×10^-7 at mass 237 ensures Pu-239 can be accurately measured in the presence of high-uranium matrices without chemical separation, which is critical for nuclear safeguards accountability.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; icp-ms; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-090" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-090">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Clean Room Sample Preparation Enclosure SHALL maintain ISO Class 5 (ISO 14644-1) particulate cleanliness within the laminar flow work zone, with measured uranium procedural blank levels below 50 pg per sample preparation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ISO Class 5 cleanliness prevents particulate contamination of sub-nanogram actinide samples during dissolution and dilution steps. At the trace levels required for ICP-MS analysis, even minor particulate contamination introduces measurement bias that would invalidate safeguards-grade isotope ratio determinations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; icp-ms; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-091" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-091">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The ICP-MS Data Processing Software SHALL calculate U-235/U-238 isotope ratios with a precision of better than 0.5% relative standard deviation at uranium concentrations of 1 ng/mL or above, applying mass bias correction using IRMM-184 natural uranium bracketing standards.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="U-235/U-238 isotope ratio precision of 0.5% RSD is required to determine uranium enrichment level for nuclear safeguards declarations. This precision level discriminates between natural (0.72%), slightly enriched, and highly enriched uranium, which is essential for nuclear material accountancy at a naval dockyard handling submarine reactor fuel.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; icp-ms; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-092" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-092">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The ICP-MS Sample Introduction and Autosampler System SHALL process at least 100 samples per analytical run with automatic rinse cycles achieving memory effect wash-out to below 0.01% of the previous sample signal within 90 seconds for uranium and plutonium.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="100-sample autosampler capacity matches the typical daily throughput of the ICP-MS suite during reactor maintenance campaigns. Automated rinse and internal standard addition eliminates manual pipetting errors and cross-contamination between high-activity and trace-level samples, maintaining measurement integrity across the analytical batch.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; icp-ms; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-093" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-093">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The ICP-MS Data Processing Software SHALL perform isotope dilution mass spectrometry calculations for U and Pu quantification using U-233 and Pu-242 tracers, with combined measurement uncertainty budgets calculated in accordance with the GUM methodology and reported at k=2.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Isotope dilution mass spectrometry is the primary reference method for U and Pu quantification in safeguards applications, providing traceability to SI units independent of matrix effects. Automated IDMS calculation eliminates transcription errors in the complex multi-isotope algebra and ensures reproducibility required for nuclear material balance reporting.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; icp-ms; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-094" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-094">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The LIMS Central Database Server SHALL maintain 99.9% availability during laboratory operating hours (0700-1900 weekdays), with automatic failover to the standby server completing within 60 seconds of primary server failure detection.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="99.9% availability during operating hours limits unplanned downtime to less than 44 minutes per month, preventing sample processing backlogs during time-critical reactor maintenance campaigns. LIMS unavailability halts sample registration, chain-of-custody tracking, and results reporting, creating a facility-wide bottleneck.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-095" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-095">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The LIMS Central Database Server SHALL retain all sample records, analytical results, calibration data, and audit trail entries for a minimum of 30 years from the date of record creation, with no data loss or corruption detectable by annual integrity verification.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="25-year retention covers the typical operational life of a naval nuclear facility and satisfies regulatory record-keeping requirements under Nuclear Site Licence Condition 6 (documents, records, authorities and certificates). Immutable audit trails prevent retrospective alteration of radiochemical results used in nuclear safety cases and discharge authorisation compliance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-096" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-096">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Instrument Data Acquisition Gateway SHALL buffer analytical data locally for a minimum of 72 hours when the connection to the LIMS Central Database Server is unavailable, and SHALL automatically synchronise all buffered records in chronological order upon connection restoration without data loss or duplication.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="72-hour local buffering ensures no analytical data is lost during planned LIMS maintenance windows or unplanned server outages. Instruments continue generating results during downtime; without local buffering, data must be manually re-entered, introducing transcription errors into safety-critical measurement records.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-097" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-097">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Sample Tracking and Chain of Custody Module SHALL generate a unique, non-reusable sample identifier for every sample and sub-sample, and SHALL record each custody transfer (location, handler identity, date-time, and purpose) within 30 seconds of the transfer being confirmed at the workstation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Unique non-reusable identifiers prevent cross-referencing errors between samples from different reactor systems or maintenance campaigns. Barcode tracking eliminates manual sample log entries and enables automated chain-of-custody verification, which is essential for forensic-quality sample traceability required by nuclear regulators.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-098" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-098">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Results Validation and Reporting Engine SHALL enforce a minimum two-stage review workflow (analyst submission followed by independent senior analyst authorisation) for all analytical results before they are released to the requesting party, and SHALL prevent any result from being modified after authorisation without creating a new auditable revision.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Two-stage review (analyst plus authorised checker) implements the independent verification principle required by ISO 17025 accreditation and nuclear site quality assurance programmes. Incorrect analytical results can lead to flawed reactor safety assessments or inaccurate discharge reports, with regulatory and safety consequences.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-099" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-099">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Results Validation and Reporting Engine SHALL calculate combined measurement uncertainty for every analytical result using the GUM (Guide to the Expression of Uncertainty in Measurement) methodology, propagating Type A and Type B uncertainty components, and SHALL report the expanded uncertainty at a 95% confidence level (coverage factor k=2).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Combined measurement uncertainty following GUM methodology is required by ISO 17025 for all accredited measurements. Uncertainty values are essential for nuclear material balance evaluation — without them, regulators cannot assess whether material unaccounted for (MUF) is within expected statistical limits or indicates potential diversion.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-100" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-100">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Quality Assurance and Audit Trail Module SHALL record every data creation, modification, and deletion event with the original value, new value, user identity authenticated via Active Directory, workstation identifier, timestamp accurate to 1 second, and reason for change, and SHALL prevent any audit trail record from being modified or deleted by any user including system administrators.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Complete audit trail immutability is required by ISO 17025 and GxP data integrity principles (ALCOA+). For a nuclear dockyard laboratory, analytical results inform reactor safety decisions and regulatory discharge reports. Any possibility of undetected data modification undermines the legal and safety basis of results. Preventing even system administrators from modifying audit records ensures defence-in-depth for data integrity and satisfies ONR and DNSR expectations for nuclear safety-related records.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-101" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-101">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Regulatory Compliance and Discharge Reporting Module SHALL calculate cumulative site discharges by radionuclide and pathway (liquid effluent, gaseous, solid waste) at least daily, and SHALL generate automatic alerts to the Radiation Protection Adviser when cumulative discharge reaches 80% and 90% of the annual Environment Agency permit limit for any radionuclide or pathway.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Cumulative discharge tracking against permit limits is a legal requirement under the Environmental Permitting Regulations and the facility's environmental permit. Automated comparison against permit thresholds prevents accidental permit exceedance, which would constitute an environmental offence and could result in enforcement action by the environment agency.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-102" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-102">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The LIMS Network Infrastructure and Cybersecurity Layer SHALL operate on a physically segregated network with no direct or routed connectivity to the internet, the dockyard general IT network, or any classified defence network, and SHALL enforce role-based access control with a minimum of four distinct roles (sample reception, analyst, senior analyst, laboratory manager) with least-privilege permissions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Physical network segregation prevents cyber-attack vectors from reaching LIMS data that includes nuclear material accountancy records and safeguards-relevant isotope ratio measurements. A compromised LIMS could enable falsification of safety-critical analytical results or reveal sensitive nuclear material inventory data. This aligns with DNSR cybersecurity requirements for defence nuclear facilities.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-103" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-103">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The LIMS Network Infrastructure and Cybersecurity Layer SHALL perform encrypted full database backups daily and incremental backups every 4 hours during operating hours, with backup media transferred to the dockyard off-site disaster recovery facility weekly, and SHALL demonstrate recovery of the complete database to within 4 hours of data loss (RPO) and within 8 hours elapsed time (RTO).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Daily full backups and hourly incremental backups with off-site replication ensure recoverability of nuclear safety records in the event of server failure, fire, or site-wide incident. The 1-hour recovery point objective limits data loss to at most one hour of analytical results, preventing the need to re-analyse samples that may have been consumed or decayed.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-104" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-104">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Sample Tracking and Chain of Custody Module SHALL maintain a real-time inventory of all fissile material present in each laboratory area by aggregating sample fissile content declarations, and SHALL generate an automatic alarm to the Criticality Safety Officer when the cumulative fissile content in any single area reaches 80% of the 50-gram fissile equivalent limit.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Real-time fissile material inventory tracking is mandated by Nuclear Site Licence Condition 5 (consignment of nuclear matter) and IAEA safeguards obligations. The system must demonstrate at any time that fissile holdings in each laboratory area remain below criticality safety limits. Failure to maintain accurate inventory could mask a criticality safety limit exceedance or material discrepancy.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lims; criticality; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SUB-REQS-105" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQS-105">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The LIMS Operator Workstation Array SHALL use sealed membrane keyboards and wipe-clean displays in all active area locations (radiochemical separations, sample preparation, hot cell control room), and SHALL support full LIMS functionality through keyboard-only navigation to allow operation while wearing protective gloves.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Sealed membrane keyboards and wipe-clean displays prevent ingress of radioactive contamination into equipment that operators touch frequently. Standard keyboards in active areas become contaminated and create a personal contamination hazard during routine use. Sealed equipment can be surface-monitored and decontaminated during routine radiological surveys.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-001" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-001">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL achieve a minimum detectable activity of less than 1 Bq for gamma-emitting radionuclides in a 1-litre Marinelli beaker geometry with a 1-hour acquisition time.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="1 Bq MDA for gamma emitters in a 1L Marinelli geometry with 1-hour count is the standard performance benchmark for HPGe detector systems used in nuclear facility radiochemistry. This sensitivity is required to detect and quantify fission products (Cs-137, Co-60, Ce-144) in reactor coolant at concentrations relevant to fuel integrity assessment and discharge compliance reporting. Failure to achieve this MDA would render the laboratory unable to confirm coolant activity is within operational limits, blocking reactor restart decisions. Derives from STK-NEEDS-001 and STK-NEEDS-005.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-002" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-002">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL measure tritium activity concentrations in aqueous samples down to 5 Bq/L with a combined measurement uncertainty of less than 20% at the 95% confidence level.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Tritium is the dominant radionuclide in PWR primary coolant and the principal contributor to liquid discharge activity. 5 Bq/L MDA with 20% uncertainty at 95% confidence is achievable by liquid scintillation counting with electrolytic enrichment and is needed to quantify tritium at levels well below the discharge limit (typically ~20,000 Bq/L) for accurate cumulative discharge tracking. Without this sensitivity, the laboratory cannot provide the discharge data required by the Environmental Permit. Derives from STK-NEEDS-003.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-003" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-003">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Hot Cell Facility SHALL limit the radiation dose rate at any accessible external surface to less than 7.5 microsieverts per hour during maximum foreseeable sample handling operations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="7.5 microsieverts/hour at accessible external surfaces corresponds to the IRR17 Supervised Area threshold. Limiting the hot cell to this dose rate at accessible surfaces means the surrounding laboratory can be designated as a Supervised rather than Controlled Area, reducing access restrictions and operational overhead for personnel working near the cell. The value is derived from the maximum foreseeable source term (1E14 Bq gamma sources during dissolution of irradiated fuel element samples) and shielding calculations. Derives from STK-NEEDS-004.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-004" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-004">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Ventilation and Containment System SHALL maintain fume cupboard face velocities at 0.5 metres per second plus or minus 10% and laboratory room negative pressure differentials of at least 10 Pa relative to adjacent non-active areas.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="0.5 m/s face velocity is the BS EN 14175 recommended minimum for containment of hazardous substances in fume cupboards. The 10% tolerance band ensures consistent containment performance without excessive energy consumption. The 10 Pa negative pressure differential prevents migration of airborne contamination from active to non-active areas, establishing the containment hierarchy required by IRR17 and the facility safety case. Derives from STK-NEEDS-004.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-005" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-005">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Active Effluent Treatment Plant SHALL reduce total alpha activity in liquid effluent to less than 0.1 Bq/L and total beta activity (excluding tritium) to less than 10 Bq/L prior to authorised discharge.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The discharge limits of 0.1 Bq/L total alpha and 10 Bq/L total beta (ex-tritium) are typical Environmental Permit conditions for nuclear site liquid discharges to sewer or controlled waterway. These values are derived from the site radiological impact assessment and represent the activity concentrations at which downstream dose to members of the public remains a small fraction of the dose constraint. The effluent treatment plant must reduce activity from incoming levels (potentially thousands of Bq/L from hot cell drains) to these levels before discharge can be authorised. Derives from STK-NEEDS-003.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-006" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-006">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Ventilation and Containment System SHALL incorporate HEPA filters with a minimum efficiency of 99.97% at the most penetrating particle size on all active extract ductwork upstream of the discharge stack.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="99.97% efficiency at MPPS (0.3 micron) is the defining performance standard for HEPA filters per BS EN 1822 / ISO 29463. This filtration efficiency is required by the facility safety case to ensure particulate radioactive discharges from the ventilation stack remain within Environmental Permit limits. HEPA filtration on all active extract ductwork is a standard nuclear facility containment measure and a defence-in-depth barrier. Derives from STK-NEEDS-003 and STK-NEEDS-004.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-007" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-007">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL limit fissile material holdings in any single laboratory area to a maximum of 50 grams fissile equivalent, enforced by both administrative controls and engineered features including safe-geometry vessels.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 50g fissile equivalent limit per location is a standard UK criticality safety approach for laboratories handling small quantities of fissile material. It is well below the minimum critical mass for any credible configuration and provides a substantial safety margin. Both administrative controls (inventory tracking, batch limits) and engineered features (safe-geometry vessels that cannot achieve a critical configuration regardless of moderation or reflection) are required as defence-in-depth. Derives from STK-NEEDS-007.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-008" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-008">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Laboratory Information Management System SHALL maintain an unbroken chain-of-custody record for every sample from receipt to result authorisation, with all data entries attributed to identified users and timestamped.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Chain-of-custody is a fundamental requirement of ISO/IEC 17025 accreditation and is essential for the legal and regulatory defensibility of analytical results. For a nuclear dockyard radiochemistry laboratory, results are used for reactor safety decisions, discharge compliance, and waste characterisation — all of which require auditable traceability from sample receipt through to authorised result. User attribution and timestamping support regulatory audit and investigation of any anomalous results. Derives from STK-NEEDS-005.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-009" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-009">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL characterise solid radioactive waste packages to quantify all radionuclides contributing more than 1% of the total activity or more than 1% of any waste acceptance criterion limit.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 1% threshold for radionuclide quantification in waste packages ensures that all radiologically significant nuclides are captured in waste records. This threshold is derived from typical waste acceptance criteria (e.g., LLWR WAC, GDF disposal system safety case) which require demonstration that the sum of fractions of individual radionuclide activity limits does not exceed unity. Omitting radionuclides contributing more than 1% could cause the waste package to fail WAC compliance assessment. Derives from STK-NEEDS-006.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-010" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-010">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL continuously monitor the active ventilation extract stack for particulate alpha activity, particulate beta activity, and iodine-131, with alarm set-points triggering at 10% of the derived air concentration limit.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Continuous stack monitoring is required by the Environmental Permit and the facility safety case to detect abnormal airborne releases in real time. The 10% of DAC alarm set-point provides early warning well before occupational exposure limits or discharge limits are approached, allowing operator intervention (increasing ventilation, isolating the source, evacuating if necessary). Monitoring for alpha, beta, and I-131 specifically covers the three principal airborne hazard categories from radiochemistry operations on reactor samples. Derives from STK-NEEDS-003 and STK-NEEDS-004.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-011" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-011">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL measure individual actinide isotope activities (Pu-238, Pu-239+240, Am-241, Cm-244) in aqueous samples to a minimum detectable activity of 0.01 Bq/L with isotope ratio determination.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Individual actinide isotope determination (Pu-238, Pu-239+240, Am-241, Cm-244) at 0.01 Bq/L MDA is required for waste characterisation (each isotope has different disposal limits and dose conversion factors) and for fuel integrity monitoring (isotope ratios indicate fuel burn-up and cladding condition). Alpha spectrometry after radiochemical separation is the standard technique. Without isotope-specific data, waste packages cannot be characterised to WAC requirements and coolant contamination sources cannot be diagnosed. Derives from STK-NEEDS-006 and STK-NEEDS-001.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-012" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-012">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="When a submarine reactor maintenance campaign is in progress, the Radio Chemistry Laboratory SHALL maintain at least one operational gamma spectrometry detector, one operational liquid scintillation counter, and sample preparation capability at all times.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="During submarine reactor maintenance campaigns, the laboratory is on the critical path for reactor plant decisions. Loss of all gamma spectrometry, liquid scintillation counting, or sample preparation capability would halt the maintenance programme. Maintaining at least one operational unit of each key capability ensures the laboratory can continue to deliver priority results even during instrument failures or scheduled calibration. The EARS 'When' trigger scopes this requirement to campaign periods when the operational impact of laboratory unavailability is highest. Derives from STK-NEEDS-008.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; session-225">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-013" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-013">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL incorporate an automatic fire detection and suppression system in all active areas, with fire detection in hot cell enclosures, waste stores, and fume cupboard extract ductwork, using detection and suppression agents that do not spread radioactive contamination or compromise containment integrity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Fire in an active radiochemistry laboratory risks breaching containment and spreading contamination through thermal damage to gloveboxes, fume cupboard sashes, and HEPA filter banks. Standard aqueous suppression agents can spread contamination via runoff. The requirement for compatible detection and suppression derives from ONR Safety Assessment Principle EHA.1 (fire safety) and the need to maintain containment integrity during and after a fire event. Hot cell enclosures and ductwork are highest risk locations due to combustible materials and elevated dose rates limiting manual firefighting.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; fire-protection; session-238; duplicate-of-SYS-REQS-014">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-014" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-014">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL incorporate an automatic fire detection and suppression system in all active areas, with fire detection in hot cell enclosures, waste stores, and fume cupboard extract ductwork, using detection and suppression agents that do not spread radioactive contamination or compromise containment integrity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="DUPLICATE: This requirement duplicates SYS-REQS-013. Retained for traceability but superseded. See SYS-REQS-013 for the authoritative fire detection and suppression requirement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; fire-protection; session-238">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-015" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-015">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="When mains electrical power is lost, the Radio Chemistry Laboratory SHALL maintain operation of all safety-critical monitoring systems including the stack discharge monitor, area gamma dose rate monitoring network, criticality warning system, and airborne contamination monitors on uninterruptible power supply for a minimum of 4 hours, with automatic changeover completing within 10 seconds.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Loss of mains power must not create a gap in safety monitoring. The stack discharge monitor provides the statutory evidence for environmental discharge compliance (RSA/EPR permit); area gamma monitors underpin worker dose assessments; the criticality warning system is a safety-critical alarm per Nuclear Site Licence Condition 26. The 4-hour UPS duration derives from typical site generator start-up plus margin for delayed diesel delivery. The 10-second changeover ensures no loss of monitoring data points at the typical 1-minute sampling interval.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; emergency-power; session-238">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-016" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-016">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL be designed to the site-specific seismic qualification level such that all primary containment barriers, shielding structures, and safety-critical monitoring systems remain functional following a design basis earthquake with a return period of 10000 years.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ONR Safety Assessment Principle EHA.7 (seismic) requires nuclear facilities to withstand design basis earthquakes without loss of containment or safety function. The 10,000-year return period is standard for UK nuclear facilities handling intermediate-level waste quantities. Primary containment barriers (hot cell walls, biological shielding) and safety-critical monitoring must maintain structural integrity to prevent uncontrolled release of radioactive material during and after a seismic event.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; seismic; session-238">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-017" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-017">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL use surface finishes on all active area floors, walls, and ceilings that achieve a decontamination factor of at least 100 for the reference radionuclide mix (Cs-137, Sr-90, Co-60, Am-241) using standard decontamination procedures, and SHALL avoid embedded pipework or services within shielding structures where they would create decommissioning waste volumes disproportionate to the activity contained.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Decontamination factor of 100 ensures surfaces can be cleaned to free-release levels for the reference radionuclide mix encountered in submarine reactor chemistry analysis. Embedded pipework within shielding creates secondary waste during decommissioning that is disproportionate to the original contamination — a lesson from legacy UK nuclear facility decommissioning (e.g., Windscale laboratories). Surface-mounted, drainable services enable decommissioning without demolishing shielding structures, reducing both waste volume and worker dose.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; decommissioning; session-238">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:SYS-REQS-018" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQS-018">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Chemistry Laboratory SHALL implement multi-layer physical access control comprising perimeter intrusion detection, building access control with biometric authentication, and nuclear material storage areas with dual-person access and real-time monitoring linked to the site security control room.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Multi-layer physical protection is required by NISR 2003 Category III material holding requirements and DNSR security policy. Biometric authentication prevents credential sharing. Dual-person access to nuclear material stores implements the two-person rule for accountable material, preventing single-person diversion. Real-time monitoring linked to the site security control room ensures immediate response to intrusion events, meeting ONR CNS expectations for detection-to-response timelines.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; security; session-238">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-001" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-001">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-001: Demonstrate flask docking operation with a standard 100L shielded transport flask containing a calibrated gamma source. Measure dose rate at operator positions during docking sequence using calibrated survey instruments. Pass criteria: no measured dose rate exceeds 7.5 microSv/h at any accessible surface; docking completes within 15 minutes from flask presentation to cell closure.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Active commissioning test validates shielded flask docking mechanism and dose rate performance at the critical primary containment interface. Test with calibrated source confirms shielding effectiveness under representative loading conditions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-002" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-002">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-002: Measure extract air flow rate at the cell-to-duct transition using a pitot tube traverse. Test isolation damper leak rate with the cell pressurised to +100 Pa. Pass criteria: flow rate within 500-1500 m3/h range; damper leakage less than 0.1% of rated flow; duct integrity confirmed by DOP aerosol challenge test.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Pitot tube flow measurement and damper leak-rate testing confirm extract airflow maintains required negative pressure during normal and isolated conditions, validating the primary contamination containment mechanism at the cell-to-duct interface.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-003" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-003">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-003: Inject test signals at the in-cell instrument terminals simulating dose rates from 0.1 microSv/h to 10 Sv/h and a criticality alarm event. Measure signal arrival time at the central radiation protection system. Pass criteria: 4-20 mA alarm signals arrive within 100 ms; Modbus TCP data updates within 1 second; alarm state correctly displayed on central system.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="End-to-end signal injection testing validates the radiation monitoring interface from in-cell detector terminals through to the health physics display, covering the full dynamic range from background to criticality event levels including alarm trigger thresholds.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-004" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-004">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-004: Flow-test the active drain with clean water at the rated 5 L/min maximum flow rate for 30 minutes. Verify U-trap seal integrity by applying negative pressure to the drain outlet and confirming no air backflow through the seal. Pass criteria: sustained 5 L/min flow without overflow or blockage; U-trap holds seal under 200 Pa negative pressure.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Flow testing with clean water at design maximum rate confirms drainage capacity and identifies potential blockage or backflow issues. U-trap seal integrity under negative pressure prevents contaminated air bypassing the ventilation containment barrier.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-005" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-005">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-005: Place a calibrated Cs-137 source of known activity at each manipulator slave arm position inside the cell. Measure dose rate at 30 cm from the manipulator wall penetration on the operator side using a calibrated ionisation chamber. Pass criteria: measured attenuation factor within 10% of calculated wall attenuation; no detectable contamination on the cold face of the manipulator boot seal after 100 operational cycles.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Dose rate measurement at manipulator penetrations with a calibrated source inside the cell confirms radiation streaming through the labyrinth penetrations meets the shielding specification. This is the critical acceptance test for the shielding/penetration design.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-006" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-006">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-006: Attempt to open both inner and outer transfer port doors simultaneously using manual and powered actuation. Confirm mechanical interlock prevents second door from opening while first door is open. Test all transfer ports. Pass criteria: no test achieves simultaneous opening of both doors under any actuation sequence.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Interlock testing confirms the safety function preventing simultaneous opening of both transfer port doors, which would breach the primary containment barrier. Both manual and powered actuation modes must be tested as they use different actuation mechanisms.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-007" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-007">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-008: Inject simulated criticality pulse signals into each criticality detection channel independently and simultaneously. Measure time from signal injection to alarm actuation. Confirm each channel operates independently. Pass criteria: alarm response within 500 ms on each channel; both channels produce alarms independently; alarm is annunciated at the central radiation protection system and local sounder.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Criticality warning system response time testing validates the safety function from detection through alarm actuation. Independent and simultaneous channel testing confirms voting logic operates correctly under both single-channel and multi-channel exceedance conditions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-008" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-008">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-011: Simulate loss of cell depression by stopping the extract fan. Attempt to open each transfer port and the cell access door. Pass criteria: all transfer ports and cell access door remain locked when cell depression falls below 50 Pa; alarm is generated within 5 seconds of depression loss.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Testing confirms the safety interlock preventing containment breach when cell depression is lost. This is a nuclear safety significant test — loss of depression combined with open transfer ports could allow contaminated air to escape the cell into occupied areas.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; hot-cell; session-226">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-009" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-009">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-007: Flow-test each active drain line with clean water at the maximum foreseeable flow rate. Confirm gravity flow from each laboratory source to the storage tank with no surcharging, measure flow gradient with survey level, and verify submerged termination by observing outlet below liquid level in tank at minimum operating level. Pass: all lines achieve gravity flow at design rate with gradient at or above 1:40.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Flow testing at maximum foreseeable rate confirms gravity drainage capacity from each laboratory area to the collection tanks without surcharge. Adequate drainage prevents floor flooding with active liquids in areas where operators are present.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-010" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-010">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-008: Transfer a 2000L batch of clean water from storage tank to neutralisation vessel using the shielded centrifugal pump. Record flow totaliser reading at start and end, compare against calibrated volumetric measurement of receiving vessel. Operate remote isolation valves from control room. Pass: flow totalisation accurate to within 2%, remote valve operation confirmed, transfer rate within 10-50 L/min range.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Full-scale batch transfer test validates pump capacity, pipeline flow resistance, and containment integrity of the shielded transfer line under representative operating conditions. Confirms the treatment plant can accept full tank batches within the operational time window.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-011" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-011">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-009: Operate evaporator with clean water feed and verify condensate delivery to IX columns at rated flow of 500 L/hr. Measure condensate temperature at IX inlet and confirm below 40C. Inject 100 mg/L NaCl solution into condensate and confirm conductivity alarm triggers within 30 seconds. Pass: flow rate achieved, temperature below limit, conductivity alarm functional at 50 mg/L threshold.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Condensate flow and temperature testing validates the evaporator-to-IX interface performance. Condensate temperature and pH must be within IX resin tolerance to prevent resin degradation, which would compromise decontamination factors.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-012" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-012">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-010: Operate peristaltic pump with simulated concentrate at design viscosity through the shielded transfer line at 1-10 L/min. Execute remote flush cycle and confirm line clearance by visual inspection of flush water clarity. Verify shielding survey of transfer route shows dose rate below 7.5 microsieverts per hour at accessible positions. Pass: pump delivers at rated flow, flush achieves clear returns, shielding adequate.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Peristaltic pump testing with simulated concentrate validates the shielded transfer line for viscous radioactive concentrate, including remote flushing capability that minimises operator dose during line clearance operations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-013" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-013">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-011: Inject calibrated test signals into the monitoring station alpha and beta measurement channels simulating activities from background to 200% of trip level. Confirm 4-20 mA analogue signals track within 1% of injected values at the discharge control PLC input terminals. Confirm Modbus TCP data matches analogue within 0.5%. Simulate trip condition and confirm discharge valve closure within 5 seconds. Pass: analogue and digital channels agree, trip function operates within specified response time.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Calibrated test signal injection validates the monitoring station measurement accuracy across the full range from background to 200% of discharge authorisation limits, ensuring reliable interlock activation before permit exceedance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-014" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-014">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-012: Execute a simulated discharge batch on the control system and confirm the complete batch record (identifier, volume, radionuclide activities, timestamp, operator IDs) appears in LIMS within 60 seconds of batch completion. Verify data integrity by comparing all fields between source and destination. Pass: all required fields present in LIMS, data matches source, transfer within time limit.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Simulated discharge batch validates the complete data chain from monitoring station through discharge control to LIMS record, confirming regulatory compliance traceability for every discharge event.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-015" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-015">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-016: Perform a SIL 2 proof test of the discharge safety function by injecting calibrated high-activity test signals into all monitoring channels simultaneously. Measure time from signal injection to confirmed valve closed position using high-speed data logger. Repeat for each individual channel. Verify spurious trip rate is below 1 per year by analysis of 1000-hour soak test data. Pass: valve closure within 5 seconds on all test scenarios, SIL 2 PFDavg demonstrated by analysis.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SIL 2 proof test validates the discharge safety function by demonstrating correct response to high-activity signals, confirming the safety interlock prevents environmental discharge above permitted activity levels.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; aetp; session-227">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-016" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-016">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-013: Measure duct velocity at the HEPA filter bank inlet using a pitot tube traverse across the 300mm duct cross-section at design extract flow rate. Confirm velocity does not exceed 10 m/s. Operate each isolation damper to full closed and full open positions and verify full stroke in less than 30 seconds. Pass criteria: duct velocity 10 m/s or less, damper full stroke within 30 seconds, no air leakage past closed damper exceeding 0.5% of rated flow.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Pitot tube velocity measurement at the HEPA bank inlet confirms uniform airflow distribution across the filter face, which is essential for achieving the specified filtration efficiency and preventing premature filter breakthrough.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-017" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-017">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-014: Inject a step change in fume cupboard sash position (full open to half-open) and record the Pressure Cascade Control System response. Verify the 4-20 mA control signal to the extract fan VSD changes within 1 second and that the laboratory pressure differential returns to within 10% of set-point within 5 seconds. Pass criteria: control signal update within 1 second, pressure recovery within 5 seconds, no pressure reversal during transient.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Dynamic response testing of the pressure cascade control system validates automatic compensation for sash position changes, ensuring the fume cupboard face velocity and room pressure cascade are maintained during normal laboratory operations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-018" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-018">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-015: Configure a test data transmission between the Stack Monitoring Instrumentation and LIMS. Inject calibrated alpha, beta, and iodine test signals into the monitoring instruments. Verify Modbus TCP data records arrive in LIMS at 15-minute intervals containing timestamp, cumulative activity, and instrument status fields. Pass criteria: all 3 radionuclide categories received, timestamp accuracy within 2 seconds of NTP reference, instrument status correctly reflects calibration mode.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="End-to-end data transmission testing from stack monitors to LIMS validates automated discharge reporting, eliminating the risk of manual transcription errors in environmental permit compliance data.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-019" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-019">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-016: Measure supply air velocity at each ceiling diffuser face using a calibrated thermal anemometer with the extract system operating at design flow rate and fume cupboard sashes at normal working position. Pass criteria: no diffuser face velocity exceeds 0.3 m/s, air distribution pattern does not create cross-drafts at fume cupboard openings exceeding 0.1 m/s.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Supply air velocity measurement at each diffuser confirms balanced air distribution providing the clean air supply that drives the pressure cascade from clean to active areas. Uniform distribution prevents stagnant zones where contamination could accumulate.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ventilation; session-228">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-020" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-020">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-017: Inject calibrated test signals at 7.5 microsievert/h and 2 mSv/h thresholds into each area gamma detector channel. Measure time from signal injection to alarm relay actuation at the central monitoring panel. Pass criteria: alarm actuation within 2 seconds for all channels; analogue alarm channel actuates independently when Modbus TCP link is disconnected.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Tests at both alarm thresholds (7.5 μSv/h and 2 mSv/h) verify the full safety-critical signal path from detector through analogue channel to the centralised display and alarm system, confirming end-to-end functionality under the dual-path architecture specified in IFC-DEFS-017.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radpro; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-021" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-021">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-018: Set test worker cumulative dose to 9.9 mSv in the dosimetry database and confirm controlled area entry is permitted. Increase to 10.1 mSv and confirm entry is denied at the turnstile within 500 ms of badge presentation. Verify dose query response time under simulated peak load of 20 simultaneous queries.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Testing at 9.9 mSv (just below the 10 mSv threshold) and then at 10.0 mSv verifies the access control boundary condition, ensuring the system correctly prevents entry at the dose constraint and permits entry just below it. This tests the critical integration between Personal Dosimetry Management and Radiological Access Control per IFC-DEFS-018.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radpro; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-022" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-022">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-019: De-energise the general area monitoring system and the facility IT network. Inject a simulated criticality signal into the criticality warning system detectors. Confirm evacuation sounders and beacons activate within 500 ms. Introduce open-circuit and short-circuit faults on alarm wiring and confirm fault detection within 60 seconds.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="De-energising the general monitoring and IT systems before testing verifies the criticality warning system's independence claim per IFC-DEFS-019. This test demonstrates that the hardwired relay path operates without any dependence on the systems it must be independent of — the most stringent test of the independence requirement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radpro; criticality; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-023" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-023">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-020: Generate a test alarm event on the central monitoring system. Confirm the alarm record appears in the LIMS within 60 seconds with correct timestamp, source identifier, measurement value, and alarm status. Verify 15-minute routine data transfer includes all active monitoring channels.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verifies the alarm event transmission path from the centralised monitoring system to LIMS per IFC-DEFS-020, confirming that alarm events are received within the 60-second requirement and contain the complete data fields needed for regulatory reporting.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radpro; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-024" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-024">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-021: Inject a simulated alpha activity signal exceeding 1 DAC into a continuous air monitor in a test zone. Confirm that the hardwired trip signal is received by the Pressure Cascade Control System and that extract flow rate increases by at least 50% within 30 seconds. Verify trip signal operates with digital network disconnected.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verifies the hardwired trip signal path from continuous air monitor to ventilation system per IFC-DEFS-021, testing the full chain from contamination detection through automatic extract flow increase, confirming the 30-second response time at the 1 DAC threshold.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radpro; ventilation; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-025" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-025">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-035: Using a Cf-252 neutron source and Co-60 gamma source at calibrated positions, demonstrate that the criticality warning system 2-out-of-3 voting logic actuates the evacuation alarm within 500 ms of both gamma and neutron thresholds being exceeded simultaneously. Repeat for each detector combination to verify all 2-of-3 permutations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Using Cf-252 (neutron) and Co-60 (gamma) calibration sources at known positions verifies the detector response, coincidence voting logic, and alarm actuation time specified in SUB-REQS-035. Testing in the actual monitored zone geometry confirms performance under real-world conditions including reflections and shielding effects.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radpro; criticality; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-026" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-026">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-038: Using NIST-traceable alpha (Am-241) and beta (Sr-90/Y-90) calibration sources at activities corresponding to 0.4 Bq/cm2 alpha and 4 Bq/cm2 beta, demonstrate that all hand and clothing monitors detect and alarm within 30 seconds. Verify exit gate interlock prevents release when contamination is detected.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="NIST-traceable calibration sources provide known reference values for verifying the detection sensitivity thresholds specified in SUB-REQS-038. Am-241 and Sr-90/Y-90 sources test alpha and beta detection pathways respectively, representing the two contamination types the monitors must detect at the specified clearance levels.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radpro; contamination; session-229">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-027" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-027">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-022: Transfer 10 representative waste items from the Sorting Facility to the NDA System via shielded trolley. Confirm each item's digital identification tag is read successfully by the NDA barcode scanner on first attempt. Pass criteria: 100% successful tag reads with correct item identification.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Testing with 10 representative waste items validates the complete sorting-to-assay transfer chain per IFC-DEFS-022, including shielded trolley transfer, barcode scanning, and item identification. Representative items cover the range of geometries and activity levels expected in routine operations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-028" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-028">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-023: Perform an NDA measurement on a calibration drum and verify that the complete assay result set (package ID, date, radionuclide inventory, uncertainties, total activity, fissile mass) appears in the Waste Tracking System within 60 seconds. Repeat for 5 consecutive measurements. Pass criteria: all 5 data transfers complete within 60 seconds with zero field errors.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Using a calibration drum with known radionuclide content provides a reference for verifying the complete NDA-to-tracking data transfer per IFC-DEFS-023, including all required data fields, structured format, and 60-second transfer time. Calibration drums provide traceable reference values against which data completeness and accuracy can be independently verified.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-029" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-029">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-024: Transfer an empty HHISO container from the compaction area to the waste store via forklift through the loading bay. Measure clearances at all points. Confirm the container identifier and storage location are recorded in the Waste Tracking System upon placement. Pass criteria: minimum 300 mm clearance each side, tracking record created within 5 minutes of placement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Testing with an actual HHISO container validates the physical transfer path (loading bay clearance, forklift access) and the digital recording chain (container ID, storage location) per IFC-DEFS-024. Using an empty container provides a safe test while exercising the full physical and data transfer interface.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-030" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-030">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-025: Perform a simulated ILW drum transfer from the conditioning plant to the ILW storage area using the overhead crane. Verify drum identifier, weight, and surface dose rate are recorded in the Waste Tracking System before crane release at the storage location. Pass criteria: all three data fields populated before placement, crane load verified within 2% of weigh-scale reading.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Simulated ILW drum transfer exercises the crane handling path and complete data recording chain per IFC-DEFS-025, verifying that weight, dose rate, and conditioning date are captured before storage placement. A simulation rather than active drum is used because the test must verify the interface mechanics before active commissioning.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-031" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-031">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-026: Submit a test set of 5 radiochemical analysis results from the LIMS for a known waste package identifier. Verify results appear in the Waste Tracking System linked to the correct package. Submit a sample request from the Waste Tracking System and verify it appears in the LIMS work queue. Pass criteria: bidirectional data exchange with zero linkage errors.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Testing with 5 known waste packages verifies the bidirectional LIMS-Waste Tracking data exchange per IFC-DEFS-026, confirming that radiochemical analysis results flow from LIMS to Waste Tracking and that sample-to-package traceability is maintained. A known dataset enables independent verification of data completeness and correctness.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; solid-waste; session-230">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-032" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-032">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-031: Position NIST-traceable Cs-137 calibration sources at each detector location. Confirm each ionisation chamber reads within 15% of the reference dose rate across five decades from 0.1 microsievert/h to 10 sievert/h. Verify all occupied zones, hot cell positions, and waste handling areas have at least one functioning detector. Pass criteria: all detectors operational and within calibration tolerance with no coverage gaps.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="NIST-traceable source calibration check confirms each detector reads within the specified accuracy band, validating the area monitoring network's ability to provide reliable dose rate measurements for worker protection decisions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radpro; session-231">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-033" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-033">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-032: Ramp a calibrated gamma source at one detector location through the 7.5 microsievert/h investigation threshold then through the 2 millisievert/h evacuation threshold. Measure time from threshold crossing to alarm actuation. Pass criteria: local alarm actuates within 5 seconds at both levels with correct alarm type annunciated.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Ramp testing through alarm thresholds validates the full alarm chain from detector through voting logic to audible/visual alarm activation, confirming response times and correct threshold settings for both investigation and evacuation levels.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radpro; session-231">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-034" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-034">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-036: Isolate the criticality warning system UPS from mains supply and confirm all detectors, voting logic, and alarm circuits remain operational for 8 hours on battery. Separately disconnect all cables between the Area Gamma Dose Rate Monitoring Network and the CWS and confirm CWS continues to function. Verify self-test cycle completes within 24 hours and correctly reports a simulated detector fault. Pass criteria: full independence demonstrated, 8-hour battery endurance achieved, self-test detects injected fault.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="UPS endurance testing confirms the criticality warning system maintains full functionality during mains power loss. This is a safety-critical system that must operate continuously regardless of site power status.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radpro; session-231">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-035" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-035">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-037: Issue an electronic personal dosemeter to a test worker. Expose the dosemeter to a calibrated Cs-137 field at known dose rates of 1 microsievert/h, 100 microsievert/h, and 1 sievert/h. Confirm real-time display reads within 10% of reference. Set cumulative dose to trigger 0.5 mSv and 2 mSv alarm thresholds and confirm audible alarm activates at each level. Exit the controlled area and confirm automatic upload of dose record to the central system. Pass criteria: display accuracy within 10%, both alarms trigger, data uploads within 60 seconds of exit.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="EPD calibration verification confirms electronic personal dosemeters read accurately across the dose rate range encountered in the laboratory, from background levels in inactive areas to elevated rates near active waste stores.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radpro; session-231">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-036" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-036">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-041: Present 20 representative waste items covering all expected categories (VLLW, LLW compactable, LLW non-compactable, ILW) to the Waste Sorting and Segregation Facility. Confirm all items are categorised within 24 hours of receipt. Verify categorisation against independent radiometric characterisation. Pass criteria: all items categorised within 24 hours, correct waste stream assignment for all items, contamination and dose rate measurements recorded for each item.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Waste sorting accuracy testing with representative waste categories validates the classification system's ability to correctly categorise waste for the appropriate disposal route, preventing regulatory non-compliance from miscategorised packages.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; solid-waste; session-231">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-037" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-037">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-042: Perform segmented gamma scanning of 5 NIST-traceable calibration drums containing known activities of Co-60, Cs-137, and Am-241 in both uniform and non-uniform distributions. Confirm measurement uncertainty is less than 20% at 2-sigma for each radionuclide contributing more than 1% of total activity. Verify 12 axial segments are acquired with full drum rotation. Pass criteria: all reported uncertainties within specification for all calibration drums.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Segmented gamma scanning verification with NIST-traceable calibration drums confirms measurement accuracy for waste characterisation across the activity range and radionuclide mix expected from radiochemistry operations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; solid-waste; session-231">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-038" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-038">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-033: Inject calibrated alpha (Am-241) and beta (Sr-90) aerosol sources into each active laboratory zone continuous air monitor. Confirm minimum detectable concentration of 0.02 DAC for alpha and 0.1 DAC for beta. Verify measurement cycle completes within 10 minutes. Verify radon background compensation by measuring with and without radon-laden air. Pass criteria: MDC values achieved, cycle time within spec, radon compensation reduces false-positive rate.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Aerosol injection testing validates continuous air monitor sensitivity for alpha and beta contamination detection, confirming the system can detect airborne contamination events that would trigger area evacuation and investigation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radpro; session-231">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-039" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-039">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-027: Conduct integration test by transmitting 100 sample registration messages from the Logging Station to LIMS over a 60-minute period. Measure end-to-end message latency for each. Simulate LIMS server unavailability for 30 seconds and confirm automatic retry delivers all pending messages. Pass criteria: all 100 messages received with correct content, latency below 2 seconds for 99 percent of messages, zero lost messages after retry.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Integration testing of the Sample Logging Station to LIMS data path verifies end-to-end message integrity, latency compliance, and error recovery. The 100-message test provides statistical confidence in the 2-second latency requirement across varying network loads.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-040" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-040">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-028: Measure extract flow rate at the duct connection using a calibrated vane anemometer or pitot tube traverse at commissioning and annually thereafter. Verify flow rate at 0.35 m3/s minimum with fume cupboard sash at maximum working height. Inspect duct integrity and damper operation. Pass criteria: flow rate at or above 0.35 m3/s, no visible duct damage or leakage, damper moves freely through full range.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Direct airflow measurement at the duct connection validates the extract system's ability to maintain containment velocity at the fume cupboard. Calibrated vane anemometry provides UKAS-traceable measurement of the 0.35 m³/s flow requirement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-041" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-041">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-029: Inspect drain installation for correct material specification (316L SS), trapped seal presence, and sampling point accessibility. Perform leak test at 0.5 bar positive pressure. Pass criteria: no visible defects, seal holds without drain-through for 24 hours, sampling valve operable, leak test holds for 30 minutes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Physical inspection verifies material specification (316L SS), trap seal integrity, and sampling point accessibility — attributes that cannot be verified by functional test alone. Material certificates and dimensional records form part of the commissioning quality dossier.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-042" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-042">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-030: Conduct transfer test using sealed dummy containers of 250ml volume containing tracer solution. Measure transfer time for 10 consecutive transfers. Swab outer container surfaces post-transfer for contamination. Pass criteria: all transfers complete within 3 minutes, all outer surfaces below 4 Bq/cm2 beta-gamma and 0.4 Bq/cm2 alpha.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Transfer testing with sealed dummy containers validates the pneumatic/carrier system performance without radiological hazard. The 250mL volume and containment seal check verify the interface against the maximum design envelope and double-seal integrity requirement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-043" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-043">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-031: Measure extract flow rate at duct connection with oven at operating temperature (900 deg C furnace). Verify negative pressure differential between oven enclosure and laboratory using manometer. Inspect HEPA filter rating label and installation seal. Pass criteria: flow rate at or above 0.1 m3/s, negative pressure of at least minus 10 Pa relative to lab, HEPA filter correctly rated and sealed.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Measuring extract flow with the oven at operating temperature validates thermal conditions do not degrade ductwork performance or HEPA filter integrity. This is a functional test that cannot be replaced by design analysis because thermal expansion and filter pressure drop are installation-specific.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-044" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-044">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-032: Connect balance to LIMS test instance. Perform 20 weighings of calibration masses. Confirm all 20 records appear in LIMS with correct mass values, units, timestamps, balance ID, and temperature. Introduce a deliberate communication break and confirm data is buffered and retransmitted. Pass criteria: 100 percent data capture accuracy, all fields populated, no data loss after reconnection.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Serial communication testing with calibration masses of known value verifies both the data link integrity and the accuracy of transmitted measurement records. The 20-weighing sample size provides confidence in reliability and the inclusion of stability and temperature fields validates completeness of the data record.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-045" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-045">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-050: Position calibration sources (Cs-137, Co-60) at 100mm from the reception bay dose rate instrument. Confirm instrument reads within plus or minus 20 percent of known dose rate across the range 0.1 uSv/h to 10 mSv/h. Time 10 consecutive dose rate measurements and confirm all complete within 60 seconds. Pass criteria: all readings within calibration tolerance, all measurements within 60-second limit.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Using calibration sources of known dose rate (Cs-137, Co-60) at the specified 100mm geometry validates the instrument's measurement accuracy and range compliance. This directly tests the requirement's stated performance envelope at the actual installation position.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-046" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-046">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-051: During a simulated campaign period, process 80 dummy samples through the full preparation workflow (receipt, logging, storage, preparation, aliquoting) over a 5-day period. Record time from receipt to delivery of prepared aliquots for each sample. Pass criteria: all 80 samples processed, 95 percent within 48-hour turnaround.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Processing 80 dummy samples through the full preparation workflow during a simulated campaign demonstrates throughput capacity under realistic conditions, including staff shift patterns and equipment turnaround. Demonstration is the appropriate verification method because throughput is an emergent property of the whole preparation system, not testable at component level.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-047" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-047">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-059: Present check sources of known activity to the contamination monitoring instruments. Confirm detection of 0.4 Bq/cm2 alpha using Am-241 source and 4 Bq/cm2 beta-gamma using Cl-36 source with instrument alarm actuation. Pass criteria: audible and visual alarm triggers at or below the specified contamination limits, instrument responds within 10 seconds.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Check sources of known activity verify the contamination monitoring instruments' detection sensitivity against the 0.4 Bq/cm² alpha and 4 Bq/cm² beta-gamma thresholds. This is a direct functional test of the measurement capability that underpins the waste segregation decision point.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; sample-prep; session-232">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-048" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-048">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-033: Measure extract airflow at each fume cupboard branch duct using a calibrated pitot traverse at commissioning and annually thereafter. Pass criterion: 0.6 m3/s plus or minus 10% per cupboard with sash fully open. Verify HEPA filter integrity by in-situ DOP aerosol challenge test to BS EN 1822, pass criterion: penetration less than 0.003%.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Pitot tube measurement at each branch duct verifies that the extract system delivers the required 0.6 m³/s per cupboard when all cupboards are operating simultaneously. This tests the balanced airflow distribution which is critical for containment and cannot be verified by single-point measurement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-049" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-049">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-034: Pressure-test the borosilicate glass drain pipework at 1.5 bar gauge for 30 minutes at commissioning. Pass criterion: no visible leakage or pressure decay greater than 0.05 bar. Verify gradient by surveyed level measurement at pipe entry and exit points. Verify material compatibility by exposing test coupons to 8M HNO3 at 80 degrees C for 168 hours with mass loss less than 0.1 mg per square centimetre.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Hydrostatic pressure testing at 1.5 bar for 30 minutes verifies the integrity of borosilicate glass drain pipework joints before commissioning with active liquors. This is the standard pipeline integrity test for acid-resistant glass systems and detects joint defects that would cause leakage of radioactive effluent.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-050" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-050">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-035: Conduct a blind sample transfer exercise with 20 uniquely barcoded vials transferred from the separations laboratory to each analytical instrument. Pass criterion: 100% correct identification at receiving end with complete LIMS records for all 20 transfers.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Blind sample transfer with barcoded vials verifies end-to-end chain of custody between the extraction chromatography station and receiving analytical instruments. The 20-vial test size provides statistical confidence in barcode readability and LIMS tracking accuracy across all four downstream instrument destinations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-051" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-051">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-036: Test the interlocked pass-through hatch by attempting simultaneous opening of both doors. Pass criterion: interlock prevents opening of second door in all 10 test cycles. Verify pressure cascade maintenance by measuring differential pressure across the hatch during door operation, pass criterion: pressure does not reverse during any phase of transfer.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Testing the interlocked pass-through hatch by attempting simultaneous opening verifies the safety interlock's ability to prevent breach of the contamination boundary. This is a direct safety function test that must be demonstrated to pass before the facility receives its commissioning certificate.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-052" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-052">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-037: Dispense 10 tracer aliquots in sequence, verifying that LIMS records each dispensing event with correct tracer identity, operator, volume, and timestamp. Pass criterion: all 10 events recorded within 30 seconds of dispensing and all fields match physical records. Verify expired-tracer lockout by attempting to scan an expired barcode.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Sequential tracer dispensing with LIMS verification tests the real-time inventory tracking system under typical operational conditions. Verifying each dispensing event within the 30-second latency requirement validates that the system can keep pace with batch preparation workflows.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radiochem-sep; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-053" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-053">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-038: Analyse 5 reference spectra of known activity and verify that results transferred to LIMS match the analysis software output to within rounding precision. Verify checksum by intentionally corrupting one transfer file and confirming rejection. Pass criterion: 5/5 correct transfers and 1/1 corruption detected.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysing reference spectra of known activity provides a direct test of the automated data bridge accuracy, including nuclide identification, activity quantification, and checksum verification. The 5-spectrum test covers the key radionuclides encountered in dockyard environmental and waste samples.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; gamma-spec; session-233">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-054" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-054">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-039: Load 10 barcoded source discs of 25mm diameter into the sample changer carousel. Verify that the barcode reader correctly identifies each disc and that LIMS records match the expected source identifier, nuclide group, and electrodeposition date. Confirm mechanical compatibility by verifying each disc seats correctly in the carousel position without manual intervention.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Sample changer automation testing confirms barcode-driven sample identification and positioning accuracy, preventing cross-contamination and sample mix-up errors in alpha spectrometry measurements.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; alpha-spec; session-234">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-055" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-055">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-040: Analyse 5 reference spectra of known activity and verify that the automated data bridge transfers nuclide identities, activity concentrations, uncertainties, yield values, and spectrum file references to the LIMS test instance. Confirm checksum verification by corrupting one transfer and verifying the system detects and rejects it.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Data bridge validation with reference spectra confirms accurate transfer of nuclide identities, activities, and uncertainties from the gamma spectrometry analyser to LIMS, maintaining measurement traceability through the automated data chain.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; alpha-spec; session-234">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-056" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-056">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-076: Measure the FWHM energy resolution of each of the 8 PIPS detectors using a certified Am-241 point source (5.486 MeV alpha) at the standard 15mm source-to-detector distance. Record peak width at half maximum in keV. Pass criterion: all 8 detectors achieve 18 keV FWHM or better.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="FWHM energy resolution measurement with a certified Am-241 source validates each PIPS detector's spectroscopic performance, confirming ability to resolve adjacent alpha peaks from actinide isotopes in mixed-radionuclide samples.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; alpha-spec; session-234">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-057" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-057">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-041: Perform controlled transfer of 10 enriched tritium samples with known enrichment factors. Confirm each sample arrives with data sheet, batch number, and recovery factor. Verify enrichment factor accuracy by comparing back-calculated activity against a reference standard spiked prior to enrichment. Pass criteria: all 10 samples have complete documentation and back-calculated activities within 10% of reference value.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Controlled transfer testing validates the enriched tritium sample interface, confirming quantitative sample transfer with associated metadata for traceability through the tritium analysis chain.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-058" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-058">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-042: Export raw spectral data from counter for 5 samples spanning the quench range (SQP(E) 200-800). Import into analysis software and verify: all 1024 channels present, SQP(E) values match counter display within 1 unit, counting times match, and sample IDs are correctly mapped. Pass criteria: zero data loss across all 5 test samples.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Multi-quench-level spectral data import validates the analysis software's ability to handle the full range of sample quench conditions encountered in radiochemistry, ensuring accurate MDA and activity calculations across all sample types.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-059" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-059">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-043: Process 20 routine analytical results through the software-to-LIMS interface. Compare LIMS-stored values against software output for activity, uncertainty, MDA, and QC flags. Inject 2 results with deliberate QC failures and verify LIMS correctly flags them. Pass criteria: zero transcription discrepancies across all 20 results, both QC failures correctly flagged.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="20-sample interface comparison validates automated result transfer accuracy between LSC analysis software and LIMS, confirming no data corruption or rounding errors in the automated data chain for regulatory reporting.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-060" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-060">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-044: Prepare 6 test fractions at acid normalities of 0.5M, 1.0M, 1.5M, 2.0M, 2.5M, and 3.0M HCl. Mix each with Ultima Gold LLT cocktail at standard ratio. Visually inspect for phase separation after 1 hour and after 24 hours. Pass criteria: no phase separation at or below 2.0M, phase separation observed above 2.0M confirming the limit is correctly specified.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Acid normality compatibility testing confirms the LSC cocktail produces stable, clear mixtures across the range of acid strengths from radiochemical separations, preventing phase separation that would invalidate counting results.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-061" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-061">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-081: Measure background count rate in the tritium window (0-18.6 keV) using sealed low-potassium glass blank vials counted for 1000 minutes on each counter. Repeat on 3 consecutive days. Pass criteria: mean background below 1.0 CPM with relative standard deviation below 15% across all measurements.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="1000-minute background counting validates the ultra-low-background performance that defines this counter's capability for environmental-level tritium measurements. Background count rate directly determines the minimum detectable activity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-062" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-062">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-083: Process 6 environmental water samples spiked with known tritium activity (approximately 5 Bq/L) through the full enrichment cycle. Measure deuterium spike recovery and calculate enrichment factor. Back-calculate original activity and compare against known spike. Pass criteria: enrichment factor &gt;= 20, deuterium recovery 90-110%, back-calculated activity within 15% of known spike.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Spiked environmental water sample testing validates the full enrichment-and-counting chain from sample receipt through to reported activity, confirming the 1 Bq/L MDA is achieved end-to-end, not just instrument-level.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; lsc; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-063" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-063">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-045: Prepare 5 test actinide fractions from extraction chromatography with known TDS levels (0.05%, 0.1%, 0.15%, 0.2%, 0.5% m/v). Analyse each on ICP-MS and compare signal recovery against a clean 2% HNO3 calibration standard. Pass criteria: fractions at or below 0.1% TDS show signal recovery within 5% of standard; fractions above 0.1% show measurable suppression confirming the limit specification.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="TDS tolerance testing validates the clean room sample preparation enclosure delivers samples within the ICP-MS matrix tolerance, preventing signal suppression and transport efficiency losses that degrade measurement accuracy.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; icp-ms; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-064" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-064">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-046: Acquire 10 replicate analyses of IRMM-184 natural uranium standard at 1 ng/mL. Export time-resolved data via software interface. Verify 100 ms integration periods are present, internal standard count rates are recorded, and tuning parameters are included. Apply particulate exclusion algorithm and confirm isotope ratio precision matches instrument specification. Pass criteria: all data fields present, U-235/U-238 ratio within 0.3% of certified value.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Replicate analysis of IRMM-184 uranium standard validates ICP-MS precision and the time-resolved data interface, confirming isotope ratio measurement capability meets safeguards-grade accuracy requirements.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; icp-ms; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-065" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-065">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-047: Process 10 IDMS results through the software-to-LIMS interface. Verify all fields (isotope ratios, IDMS concentrations, individual uncertainty components, expanded uncertainty) are correctly transferred. Retrieve records after 30 days and confirm data integrity is maintained. Pass criteria: zero discrepancies between software output and LIMS-stored values across all fields.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IDMS result transfer validation confirms isotope ratio calculations, concentrations, and uncertainties are correctly passed through the software-to-LIMS interface without data loss, maintaining traceability for nuclear material accountancy.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; icp-ms; session-235">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-066" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-066">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-048: Inject 500 test result records from 5 simulated instruments simultaneously into the Instrument Data Acquisition Gateway. Confirm all 500 records appear in the database within 10 minutes with correct field mapping. Interrupt the network connection mid-batch and confirm no partial records exist after reconnection and synchronisation. Pass criteria: zero data loss, zero partial records, throughput &gt;= 50 records/minute sustained.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Concurrent multi-instrument data injection stress-tests the gateway's throughput capacity and confirms data integrity under peak load conditions representative of simultaneous analytical runs across the laboratory.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-067" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-067">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-049: Attempt to submit an analytical result for a sample identifier that does not exist in the tracking module. Confirm the result is rejected with an appropriate error. Then register the sample and resubmit — confirm acceptance. Submit a priority sample and confirm the priority flag propagates to the results review queue. Pass criteria: 100% rejection of orphaned results, correct priority propagation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Negative testing confirms the sample tracking module rejects orphan results, preventing analytical data from being recorded without a valid chain-of-custody record. This is essential for forensic-quality sample traceability.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-068" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-068">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-050: Create 20 test results spanning liquid effluent, gaseous, and solid waste pathways. Authorise all through the two-stage workflow. Confirm the regulatory module aggregates by pathway correctly. Attempt to modify a source result via the regulatory module interface — confirm the attempt is rejected. Submit a result that has only single-stage review — confirm it is excluded from regulatory aggregation. Pass criteria: correct pathway aggregation, zero unauthorised modifications, zero inclusion of unreviewed results.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Multi-pathway result transfer testing validates the authorisation workflow and regulatory module integration across all waste discharge categories, confirming approved results correctly contribute to cumulative discharge totals.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-069" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-069">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-051: Submit a sequence of 20 calibration check results for a test instrument, with results 18 and 19 deliberately exceeding the 3-sigma action limit. Confirm the control chart updates automatically, the action limit trigger generates a notification, and the instrument is locked out from new analytical runs. Clear the lockout and confirm the instrument resumes accepting runs. Pass criteria: real-time chart update, correct threshold detection, instrument lockout enforced, lockout clearance functional.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Deliberate out-of-tolerance calibration check testing validates the QA module's automated flagging and instrument suspension capability, preventing results from miscalibrated instruments entering the quality system.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-070" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-070">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-DEFS-052: Log into a test workstation configured as an active area terminal. Leave the session idle for 14 minutes — confirm the session remains active. Wait one additional minute — confirm automatic logout. Repeat for a non-active area terminal at 29 and 31 minutes. Capture network traffic during a session and confirm TLS 1.2+ encryption with mutual certificate authentication. Attempt login from a device without a valid client certificate — confirm rejection. Pass criteria: correct timeout enforcement, TLS 1.2+ confirmed, unauthenticated device rejected.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Session timeout and authentication testing validates cybersecurity controls at the operator workstation level, confirming unattended terminals are secured and all access events are logged for audit trail requirements.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; lims; session-236">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-071" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-071">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-001: Perform gamma dose rate survey of all accessible external surfaces of the biological shielding structure using calibrated ionisation chamber instruments (range 0.1-1000 µSv/h) with sealed gamma sources of known activity (Co-60 and Cs-137 up to 1E14 Bq equivalent) positioned at representative cell interior locations. Pass criteria: no measured dose rate exceeds 7.5 µSv/h at any accessible surface. Survey to be conducted at commissioning and after any structural modification.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="External surface dose rate survey is the primary acceptance test for the biological shielding structure, confirming radiation exposure to operators in occupied areas adjacent to the hot cell meets the design dose rate limit.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; hot-cell; session-237">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-072" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-072">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-004: With the in-cell ventilation extract system operating at design duty and all cell penetrations sealed, measure the differential pressure between the hot cell interior and the adjacent operator area using calibrated differential pressure transmitters at three locations. Pass criteria: all readings show at least 50 Pa negative differential sustained for a minimum of 60 minutes. Test with cell access door closed and all transfer ports in normal configuration.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Differential pressure measurement validates the primary containment mechanism — negative pressure prevents contaminated air escaping the cell. This is the fundamental safety demonstration for the hot cell containment system.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ventilation; session-237">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-073" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-073">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-005: Perform in-situ aerosol challenge test on each HEPA filter stage using DOP or PAO aerosol at the most penetrating particle size (0.3 µm MMAD). Measure upstream and downstream concentrations with a calibrated photometer. Pass criteria: combined two-stage penetration less than 0.0001% (DF &gt;= 1E6). Test at design airflow and after filter installation, replacement, or housing maintenance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="In-situ DOP/PAO aerosol challenge at 0.3 µm MMAD validates HEPA filtration efficiency at the most penetrating particle size, confirming the ventilation system provides the required decontamination factor for airborne particulate discharges.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ventilation; session-237">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-074" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-074">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-009: After a representative decontamination cycle using the specified decontamination agents and procedures, perform surface contamination surveys on a minimum of 20 representative cell interior surfaces using direct-reading alpha and beta/gamma contamination monitors calibrated to relevant isotopes. Pass criteria: all surveyed surfaces below 4 Bq/cm2 alpha and 40 Bq/cm2 beta-gamma within 8 hours of decontamination start.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Post-decontamination surface survey validates that cell internal surfaces can be cleaned to the required residual contamination level using standard procedures, confirming decontaminability for routine maintenance and end-of-life decommissioning.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; hot-cell; session-237">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-075" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-075">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-017: Perform hydrostatic pressure test on each active drain run at 1.5x design pressure. Confirm no leakage from inner pipe into the annular space over a 30-minute hold period using calibrated pressure gauges. Verify leak detection system functionality by injecting a known volume of tracer liquid into the annular monitoring sump. Pass criteria: zero leakage on pressure test; leak detection alarm activates within 60 seconds of tracer injection.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Hydrostatic pressure testing at 1.5x design pressure validates drain pipe integrity including the double-containment annular space, confirming active liquid spills cannot reach the building drainage or ground without detection.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; effluent; session-237">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-076" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-076">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-025: With the duty extract fan operating at design flow, simulate fan failure by tripping the duty fan motor. Measure time from duty fan trip to standby fan reaching design flow using calibrated flow measurement. Record pressure cascade measurements throughout changeover. Pass criteria: standby fan reaches design flow within the specified changeover time; pressure cascade does not reverse at any monitored zone during changeover.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Fan changeover timing test validates the standby fan automatic start capability, confirming ventilation containment is maintained during single-fan failure. Uninterrupted extract flow prevents loss of negative pressure cascade.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ventilation; session-237">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-077" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-077">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-027: With the ventilation system operating at design conditions and all laboratory areas in normal configuration, measure differential pressure at each zone boundary using calibrated differential pressure transmitters. Verify corridor (ambient reference), general labs (-15 Pa), active labs (-30 Pa), fume cupboards (-50 Pa), and hot cells (-75 Pa). Pass criteria: all measured differentials within ±5 Pa of design values, sustained for 30 minutes minimum. Repeat with one fume cupboard sash fully open to verify cascade stability under transient load.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Differential pressure measurement across all laboratory zones validates the pressure cascade from clean to active areas, confirming the designed airflow direction prevents contamination migration to lower-hazard zones.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ventilation; session-237">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-078" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-078">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQS-034: Place calibrated gamma check sources (Cs-137) at each area monitor location and confirm reading within ±20% of expected dose rate. Verify alarm trip points by incrementally increasing source activity. Confirm signal transmission to centralised monitoring display with timestamp accuracy within 5 seconds. Pass criteria: all monitors respond within ±20% of calibration source value; alarm thresholds trigger within 10% of set points; centralised display updates within 5 seconds.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gamma check source and alarm testing validates each area monitor's measurement accuracy and alarm function, confirming the radiation protection monitoring network provides reliable data for worker protection and regulatory compliance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; rad-protection; session-237">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-079" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-079">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQS-014: Commission automatic fire detection system in all active areas. Test detection response time with simulated fire sources in hot cell, waste store, and ductwork locations. Verify suppression agent discharge does not breach containment or spread contamination beyond the fire zone. Pass criteria: detection within 30 seconds of simulated fire source, suppression activation within 60 seconds, no measurable increase in airborne contamination outside the affected zone.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Active commissioning testing of fire detection and suppression is required to demonstrate performance in the specific geometry and environment of each active area. Simulated fire sources validate detection sensitivity in the presence of radiological hazards. Contamination monitoring during suppression discharge confirms the suppression strategy does not create a secondary radiological hazard, which is the key differentiator from conventional fire suppression verification.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; fire-protection; session-238; duplicate-of-VER-METHODS-080">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-radiochem-lab:VER-METHODS-080" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-METHODS-080">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQS-014: Commission automatic fire detection system in all active areas. Test detection response time with simulated fire sources in hot cell, waste store, and ductwork locations. Verify suppression agent discharge does not breach containment or spread contamination beyond the fire zone. Pass: detection within 30 seconds, suppression within 60 seconds, no contamination spread.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="DUPLICATE: This verification entry duplicates VER-METHODS-079. Retained for traceability but superseded. See VER-METHODS-079 for the authoritative fire suppression verification method.">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="UPS changeover testing during live operations validates the actual transfer time experienced by safety-critical instruments, including transient effects on sensitive detectors. The 4-hour endurance test under representative load confirms battery sizing calculations and identifies any cells with degraded capacity. Zero monitoring gap verification ensures compliance with environmental permit conditions for continuous discharge monitoring.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
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          </ATTRIBUTE-VALUE-STRING>
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        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-14" LAST-CHANGE="2026-04-24T20:18:41.421Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-radiochem-lab:SUB-REQS-034</SPEC-OBJECT-REF></SOURCE>
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          </ATTRIBUTE-VALUE-STRING>
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