Technical Elements Documentation
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    Interface PlantOperatingState

    Interface representing a plant operating state (POS). Per RG 1.247, a POS represents distinct and relatively constant plant conditions. The POS is defined in terms of all important conditions that may affect the delineation and evaluation of event sequences modeled in the PRA. POS definitions should consider decay heat level, RCS configuration, reactor level, reactor pressure and temperature, radionuclide transport configuration, status of barriers, available instrumentation, and other parameters needed to determine success criteria and source terms.

    POS-A3, POS-A5, POS-A6, POS-A7, POS-A8, POS-B1, POS-B2, POS-B3

    interface PlantOperatingState {
        activitiesLeadingToChanges?: string[];
        assumptions?: string[];
        availableInstrumentation: string[];
        characteristics?: string;
        decayHeatRemoval: DecayHeatRemovalSystems;
        description?: string;
        detailedInstrumentation?: Instrument[];
        detailedRadioactiveSources?: plant_operating_states_analysis.RadioactiveSource[];
        initiatingEvents: InitiatingEvent[];
        meanDuration: number;
        meanFrequency?: Frequency;
        meanTimeSinceShutdown?: number;
        operatingMode: OperatingState;
        plantRepresentationAccuracy?: PlantRepresentationAccuracy & {
            highConfidenceAreas?: string[];
            improvementPlans?: string[];
            lowerConfidenceAreas?: string[];
        };
        processCriteriaIdentification?: string;
        radioactiveMaterialSources: string[];
        radionuclideTransportBarrier: RadionuclideTransportBarriers;
        rcbConfiguration: string;
        rcsParameters: ReactorCoolantSystemParameters;
        riskSignificance?: OperatingStateRisk;
        safetyFunctions: SafetyFunction[];
        successCriteriaIds?: SuccessCriteriaId[];
        timeBoundary: TimeBoundary;
        timeVaryingConditions?: TimeVaryingCondition[];
    }

    Hierarchy

    • Unique
    • Named
      • PlantOperatingState
    Index

    Properties

    activitiesLeadingToChanges? assumptions? availableInstrumentation characteristics? decayHeatRemoval description? detailedInstrumentation? detailedRadioactiveSources? initiatingEvents meanDuration meanFrequency? meanTimeSinceShutdown? operatingMode plantRepresentationAccuracy? processCriteriaIdentification? radioactiveMaterialSources radionuclideTransportBarrier rcbConfiguration rcsParameters riskSignificance? safetyFunctions successCriteriaIds? timeBoundary timeVaryingConditions?

    Properties

    activitiesLeadingToChanges?: string[]

    Activities that may lead to changes in parameters

    assumptions?: string[]

    Assumptions made in defining this operating state

    availableInstrumentation: string[]

    Available instrumentation for monitoring key parameters

    characteristics?: string

    Characteristics of the operating state

    decayHeatRemoval: DecayHeatRemovalSystems

    Decay heat removal systems available

    description?: string

    Description of the plant operating state

    detailedInstrumentation?: Instrument[]

    Detailed information about available instruments

    detailedRadioactiveSources?: plant_operating_states_analysis.RadioactiveSource[]

    Detailed information about radioactive sources in this POS

    initiatingEvents: InitiatingEvent[]

    Initiating events applicable to this state References to initiating events defined in the core/events module

    meanDuration: number

    Mean duration of the plant operating state in hours

    meanFrequency?: Frequency

    Mean frequency of the plant operating state

    meanTimeSinceShutdown?: number

    Mean time since shutdown in hours

    operatingMode: OperatingState

    Operating mode or operational condition of the plant

    plantRepresentationAccuracy?: PlantRepresentationAccuracy & {
        highConfidenceAreas?: string[];
        improvementPlans?: string[];
        lowerConfidenceAreas?: string[];
    }

    Plant representation accuracy for this POS Documents how closely the PRA model represents the as-built and as-operated plant

    Type declaration

    • OptionalhighConfidenceAreas?: string[]

      Areas with high confidence

    • OptionalimprovementPlans?: string[]

      Plans for improvement

    • OptionallowerConfidenceAreas?: string[]

      Areas with lower confidence

    processCriteriaIdentification?: string

    Process criteria identification for transitions

    radioactiveMaterialSources: string[]

    Sources of radioactive material within the scope of the PRA

    radionuclideTransportBarrier: RadionuclideTransportBarriers

    Radionuclide transport barrier statuses

    rcbConfiguration: string

    Reactor Coolant Boundary configuration

    rcsParameters: ReactorCoolantSystemParameters

    Reactor coolant system parameter ranges

    riskSignificance?: OperatingStateRisk

    Risk significance of this operating state Captures the contribution to overall plant risk

    safetyFunctions: SafetyFunction[]

    Safety functions and their status in this operating state

    successCriteriaIds?: SuccessCriteriaId[]

    References to success criteria specific to this operating state These IDs reference success criteria defined in the success-criteria module Format: SC-[SYSTEM]-[NUMBER], e.g., "SC-RCIC-001"

    timeBoundary: TimeBoundary

    Explicit time boundary that defines when this POS begins and ends Used to ensure mutual exclusivity between operating states

    POS-B1, POS-B2, POS-B3

    timeVaryingConditions?: TimeVaryingCondition[]

    Time-varying conditions within this POS Captures how conditions change over time during the POS

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