Variable EBRII_PumpDocumentationExampleConst

Type declaration

• ReadonlymodelUncertainty: {
      name: "EBR-II Primary Sodium Pump Model Uncertainty Documentation";
      reasonableAlternatives: readonly [
          {
              alternative: "Use of Exponential distribution instead of Lognormal for failure rate modeling";
              applicableParameters: readonly ["PARAM-EBRII-PSP-FR-001"];
              reasonNotSelected: "Lognormal better characterizes the uncertainty in the estimated parameters given the limited data";
          },
          {
              alternative: "Separate parameter estimates for different operational phases";
              applicableParameters: readonly ["PARAM-EBRII-PSP-FR-001"];
              reasonNotSelected: "Insufficient data to support statistically significant separate estimates";
          },
      ];
      relatedAssumptions: readonly [
          {
              applicableParameters: readonly ["PARAM-EBRII-PSP-FR-001"];
              assumption: "EBR-II primary pump reliability characteristics are representative of modern sodium pump designs";
              basis: "Design principles for electromagnetic sodium pumps have not fundamentally changed, though materials and manufacturing have improved";
          },
          {
              applicableParameters: readonly ["PARAM-EBRII-PSP-CCF-001"];
              assumption: "Common cause failure mechanisms for sodium pumps are similar to those of light water reactor pumps";
              basis: "While fluid properties differ, fundamental CCF mechanisms like design errors, manufacturing defects, and maintenance errors remain similar";
          },
      ];
      requirementReference: "DA-E2";
      uncertaintySources: readonly [
          {
              applicableParameters: readonly [
                  "PARAM-EBRII-PSP-FR-001",
                  "PARAM-EBRII-PSP-FS-001",
              ];
              impact: "Introduces uncertainty in applicability of parameter estimates to current sodium-cooled fast reactor designs";
              source: "Operating environment differences between EBR-II and modern liquid metal reactors";
          },
          {
              applicableParameters: readonly [
                  "PARAM-EBRII-PSP-FR-001",
                  "PARAM-EBRII-PSP-FS-001",
                  "PARAM-EBRII-PSP-CCF-001",
              ];
              impact: "Increases uncertainty in generic data applicability and requires greater reliance on expert judgment";
              source: "Limited operational history of sodium pumps in commercial power applications";
          },
      ];
      uuid: "e87b2c3d-1234-5678-90ab-cdef01234567";
  }

  Model uncertainty documentation implementing DA-E2 Documents sources of model uncertainty and their impact

• ReadonlypreOperationalAssumptions: {
      assumptions: readonly [
          {
              assumptionId: "ASSUME-EBRII-PSP-001";
              basis: "Advancements in materials, manufacturing, and control systems are expected to improve reliability";
              description: "Modern electromagnetic pump designs will have equal or better reliability than EBR-II pumps";
              impact: "May overestimate failure rates if modern designs prove more reliable";
              limitations: readonly [
                  "May not account for new failure modes introduced by design innovations",
                  "Limited operational experience with newer pump designs",
              ];
              status: "OPEN";
          },
          {
              assumptionId: "ASSUME-EBRII-PSP-002";
              basis: "Modern maintenance technologies and practices have generally improved over time";
              description: "Maintenance practices for modern sodium pumps will be at least as effective as those for EBR-II";
              impact: "May underestimate maintenance-related failures if modern practices prove less effective";
              limitations: readonly [
                  "Loss of institutional knowledge about sodium pump maintenance",
                  "Reduced availability of specialized maintenance personnel",
              ];
              status: "IN_PROGRESS";
          },
      ];
      name: "EBR-II Primary Sodium Pump Pre-Operational Assumptions";
      relatedNote: "DA-N-5";
      relatedRequirement: "DA-A6";
      supportingDocumentationReferences: readonly [
          "EBR-II Operational History Report OHR-1994-001",
          "Modern Sodium Pump Design Comparison Study MSPD-2023-001",
      ];
      uuid: "f9876543-21ab-cdef-4321-fedcba098765";
      validationPhase: "Early operational testing";
  }

  Pre-operational assumptions documentation implementing DA-E3 Documents assumptions made due to limited design or operational data

• ReadonlyprocessDocumentation: {
      basicEventProbabilityModels: readonly [
          {
              basicEventId: "BE-EBRII-PSP-FR-001";
              justification: "Lognormal distribution selected based on industry standard practices for continuous operation components with multiplicative failure mechanisms";
              model: "LOGNORMAL";
          },
          {
              basicEventId: "BE-EBRII-PSP-FS-001";
              justification: "Beta distribution selected for demand-based failure mode to properly model uncertainty with limited data";
              model: "BETA";
          },
      ];
      bayesianPriorRationales: readonly [
          {
              parameterId: "PARAM-EBRII-PSP-FR-001";
              priorDistribution: "Lognormal(μ=-11.51, σ=1.5)";
              rationale: "Prior based on generic liquid metal pump failure rates with wide uncertainty to accommodate limited industry experience";
          },
      ];
      ccfProbabilityBasis: readonly [
          {
              ccfParameterId: "PARAM-EBRII-PSP-CCF-001";
              estimationMethod: "Alpha Factor Model with specialized adjustment for liquid metal environment";
              mappingJustification: "Alpha factors derived from light water reactor experience adjusted for liquid metal environment based on expert judgment";
          },
      ];
      componentGroupingDocumentation: readonly [
          {
              groupId: "GROUP-EBRII-PUMPS-001";
              groupingCriteria: "Primary sodium pumps grouped based on similar design, operational characteristics, and environment";
              outlierExclusionJustifications: readonly [
                  {
                      alternativeTreatment: "Analyzed as separate component with its own failure parameters";
                      componentId: "COMP-EBRII-PSP-003";
                      detailedJustification: "Secondary loop pump operates at lower temperature and has different seal design, resulting in significantly different failure characteristics";
                      exclusionReason: "Significant design differences and operating conditions";
                  },
              ];
              outlierIdentificationMethodology: "Statistical hypothesis testing comparing failure rates across similar components with 95% confidence threshold";
              supportingAnalyses: readonly [
                  "EBR-II Pump Similarity Analysis Report PSAR-2022-001",
              ];
          },
      ];
      dataCollectionPeriods: readonly [
          {
              censoringJustification: "Pre-1980 data excluded due to major design modifications to pump control systems";
              endDate: "1994-12-31";
              parameterId: "PARAM-EBRII-PSP-FR-001";
              startDate: "1980-01-01";
          },
      ];
      dataExclusionJustifications: readonly [
          {
              excludedData: "Three failure events during special testing operations in 1983";
              justification: "Events occurred during non-standard operating conditions not representative of normal operation";
              parameterId: "PARAM-EBRII-PSP-FR-001";
          },
      ];
      genericParameterRationales: readonly [
          {
              operatingStates: readonly ["POS-STARTUP-200", "POS-SHUTDOWN-300"];
              parameterId: "PARAM-EBRII-PSP-FS-001";
              rationale: "Generic parameters used for startup and shutdown states due to insufficient plant-specific data for these infrequent operating states";
          },
      ];
      genericParameterSources: readonly [
          {
              parameterId: "PARAM-EBRII-PSP-FR-001";
              reference: "Section 5.4, with adjustments for liquid metal reactor applications";
              source: "NUREG/CR-6928, Industry-Average Performance for Components and Initiating Events at U.S. Commercial Nuclear Power Plants";
          },
          {
              parameterId: "PARAM-EBRII-PSP-FS-001";
              reference: "LMFR-RDB-2023, Section 4.2.1";
              source: "Liquid Metal Fast Breeder Reactor Reliability Database (LMFR-RDB)";
          },
      ];
      name: "EBR-II Primary Sodium Pump Data Analysis Documentation";
      operatingStateDataJustifications: readonly [
          {
              justification: "Full power operation provides most representative conditions for primary pump failure rates as pumps operate at design flow rates and temperatures";
              operatingState: "POS-FULL-POWER-100";
              parameterId: "PARAM-EBRII-PSP-FR-001";
          },
      ];
      parameterEstimates: readonly [
          {
              estimate: 0.000012;
              parameterId: "PARAM-EBRII-PSP-FR-001";
              uncertaintyCharacterization: "Lognormal distribution with 5th percentile 2.5e-6, 95th percentile 5.8e-5, error factor 4.8";
          },
          {
              estimate: 0.0034;
              parameterId: "PARAM-EBRII-PSP-FS-001";
              uncertaintyCharacterization: "Beta distribution with α=2.5, β=732, 5th percentile 6.7e-4, 95th percentile 8.2e-3";
          },
      ];
      plantSpecificDataSources: readonly [
          {
              operatingState: "POS-FULL-POWER-100";
              parameterId: "PARAM-EBRII-PSP-FR-001";
              source: "EBR-II Operational Records 1964-1994";
              timePeriod: "1980-1994";
          },
      ];
      systemComponentBoundaries: readonly [
          {
              boundaries: readonly [
                  "Electromagnetic pump assembly",
                  "Control circuitry",
                  "Power supply components",
                  "Primary flow path components",
              ];
              boundaryDescription: "EBR-II primary sodium pump including motor, pump, shaft, bearings, and seals";
              componentId: "COMP-EBRII-PSP-001";
              references: readonly [
                  "EBR-II System Design Description SDD-PCS-001",
                  "EBR-II Primary Pump Drawing E-12345-001",
              ];
              systemId: "SYS-EBRII-PCS-001";
          },
      ];
      uuid: "dd72a844-ff75-4517-86a4-5e4bfc7c0384";
  }

  Basic documentation structure implementing DA-E1 requirements

  • ReadonlybasicEventProbabilityModels: readonly [
        {
            basicEventId: "BE-EBRII-PSP-FR-001";
            justification: "Lognormal distribution selected based on industry standard practices for continuous operation components with multiplicative failure mechanisms";
            model: "LOGNORMAL";
        },
        {
            basicEventId: "BE-EBRII-PSP-FS-001";
            justification: "Beta distribution selected for demand-based failure mode to properly model uncertainty with limited data";
            model: "BETA";
        },
    ]

    Basic event probability models (DA-E1.b) Documents how basic event probabilities are evaluated

  • ReadonlybayesianPriorRationales: readonly [
        {
            parameterId: "PARAM-EBRII-PSP-FR-001";
            priorDistribution: "Lognormal(μ=-11.51, σ=1.5)";
            rationale: "Prior based on generic liquid metal pump failure rates with wide uncertainty to accommodate limited industry experience";
        },
    ]

    Bayesian prior rationales (DA-E1.h) Documents selection of prior distributions for Bayesian updates

  • ReadonlyccfProbabilityBasis: readonly [
        {
            ccfParameterId: "PARAM-EBRII-PSP-CCF-001";
            estimationMethod: "Alpha Factor Model with specialized adjustment for liquid metal environment";
            mappingJustification: "Alpha factors derived from light water reactor experience adjusted for liquid metal environment based on expert judgment";
        },
    ]

    CCF probability basis (DA-E1.g) Documents basis for common cause failure probability

  • ReadonlycomponentGroupingDocumentation: readonly [
        {
            groupId: "GROUP-EBRII-PUMPS-001";
            groupingCriteria: "Primary sodium pumps grouped based on similar design, operational characteristics, and environment";
            outlierExclusionJustifications: readonly [
                {
                    alternativeTreatment: "Analyzed as separate component with its own failure parameters";
                    componentId: "COMP-EBRII-PSP-003";
                    detailedJustification: "Secondary loop pump operates at lower temperature and has different seal design, resulting in significantly different failure characteristics";
                    exclusionReason: "Significant design differences and operating conditions";
                },
            ];
            outlierIdentificationMethodology: "Statistical hypothesis testing comparing failure rates across similar components with 95% confidence threshold";
            supportingAnalyses: readonly [
                "EBR-II Pump Similarity Analysis Report PSAR-2022-001",
            ];
        },
    ]

    Component grouping documentation (DA-B1, DA-B2) Documents component grouping decisions including outlier handling

  • ReadonlydataCollectionPeriods: readonly [
        {
            censoringJustification: "Pre-1980 data excluded due to major design modifications to pump control systems";
            endDate: "1994-12-31";
            parameterId: "PARAM-EBRII-PSP-FR-001";
            startDate: "1980-01-01";
        },
    ]

    Time periods for data collection (DA-E1.e) Documents specific time periods and any censoring

  • ReadonlydataExclusionJustifications: readonly [
        {
            excludedData: "Three failure events during special testing operations in 1983";
            justification: "Events occurred during non-standard operating conditions not representative of normal operation";
            parameterId: "PARAM-EBRII-PSP-FR-001";
        },
    ]

    Data exclusion justification (DA-E1.f) Documents reasons for excluding certain data points

  • ReadonlygenericParameterRationales: readonly [
        {
            operatingStates: readonly ["POS-STARTUP-200", "POS-SHUTDOWN-300"];
            parameterId: "PARAM-EBRII-PSP-FS-001";
            rationale: "Generic parameters used for startup and shutdown states due to insufficient plant-specific data for these infrequent operating states";
        },
    ]

    Generic parameter rationales (DA-E1.k) Documents rationale for using generic parameter estimates

  • ReadonlygenericParameterSources: readonly [
        {
            parameterId: "PARAM-EBRII-PSP-FR-001";
            reference: "Section 5.4, with adjustments for liquid metal reactor applications";
            source: "NUREG/CR-6928, Industry-Average Performance for Components and Initiating Events at U.S. Commercial Nuclear Power Plants";
        },
        {
            parameterId: "PARAM-EBRII-PSP-FS-001";
            reference: "LMFR-RDB-2023, Section 4.2.1";
            source: "Liquid Metal Fast Breeder Reactor Reliability Database (LMFR-RDB)";
        },
    ]

    Generic parameter sources (DA-E1.c) Documents sources for generic parameter estimates

  • Readonlyname: "EBR-II Primary Sodium Pump Data Analysis Documentation"

  • ReadonlyoperatingStateDataJustifications: readonly [
        {
            justification: "Full power operation provides most representative conditions for primary pump failure rates as pumps operate at design flow rates and temperatures";
            operatingState: "POS-FULL-POWER-100";
            parameterId: "PARAM-EBRII-PSP-FR-001";
        },
    ]

    Operating state data justification (DA-E1.j) Documents justification for operating state data usage

  • ReadonlyparameterEstimates: readonly [
        {
            estimate: 0.000012;
            parameterId: "PARAM-EBRII-PSP-FR-001";
            uncertaintyCharacterization: "Lognormal distribution with 5th percentile 2.5e-6, 95th percentile 5.8e-5, error factor 4.8";
        },
        {
            estimate: 0.0034;
            parameterId: "PARAM-EBRII-PSP-FS-001";
            uncertaintyCharacterization: "Beta distribution with α=2.5, β=732, 5th percentile 6.7e-4, 95th percentile 8.2e-3";
        },
    ]

    Parameter estimates with uncertainty (DA-E1.i) Documents final parameter estimates and their uncertainty

  • ReadonlyplantSpecificDataSources: readonly [
        {
            operatingState: "POS-FULL-POWER-100";
            parameterId: "PARAM-EBRII-PSP-FR-001";
            source: "EBR-II Operational Records 1964-1994";
            timePeriod: "1980-1994";
        },
    ]

    Plant-specific data sources (DA-E1.d) Documents plant-specific data sources used

  • ReadonlysystemComponentBoundaries: readonly [
        {
            boundaries: readonly [
                "Electromagnetic pump assembly",
                "Control circuitry",
                "Power supply components",
                "Primary flow path components",
            ];
            boundaryDescription: "EBR-II primary sodium pump including motor, pump, shaft, bearings, and seals";
            componentId: "COMP-EBRII-PSP-001";
            references: readonly [
                "EBR-II System Design Description SDD-PCS-001",
                "EBR-II Primary Pump Drawing E-12345-001",
            ];
            systemId: "SYS-EBRII-PCS-001";
        },
    ]

    System and component boundaries (DA-E1.a) References a SystemDefinition from Systems Analysis

  • Readonlyuuid: "dd72a844-ff75-4517-86a4-5e4bfc7c0384"