Technical Elements Documentation
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    Interface PlantEvolution

    Interface representing plant evolution information. Combines the original PlantEvolution with PlantEvolutionDescription and PlantEvolutionConsiderations.

    POS-A1, POS-A2, POS-A9

    interface PlantEvolution {
        activitiesLeadingToChanges: string[];
        availableInstrumentation: string[];
        description?: string;
        evolutionConsiderations?: {
            availableMonitoringDevices: string[];
            hazardBarrierEffectivenessChanges?: string[];
            operatorActions: string[];
            propagationPathwayModifications?: string[];
            radionuclideTransportBarrierStatus: string[];
            reactorCoolantBoundaryConfigurations: string[];
            reactorCoolantSystemParameterRanges: string[];
            screeningStatus: ScreeningStatus;
            sscFragilityModifications?: string[];
            transitionParameters?: TransitionParameter[];
        };
        evolutionProperties?: { praMode: string; screeningStatus: ScreeningStatus };
        initiatingEvents?: InitiatingEvent[];
        operatingModes: string[];
        operationalAssumptions: string[];
        plantOperatingStates: PlantOperatingState[];
        radionuclideTransportBarriersStatus: string[];
        rcbConfigurations: string[];
        rcsParameters: {
            coolantInventory?: number;
            powerLevel?: number;
            pressure?: number;
            temperature?: number;
        };
        sscCapabilitiesChanges: string[];
        transitions?: TransitionEvent[];
    }

    Hierarchy

    • Unique
    • Named
      • PlantEvolution
    Index

    Properties

    activitiesLeadingToChanges availableInstrumentation description? evolutionConsiderations? evolutionProperties? initiatingEvents? operatingModes operationalAssumptions plantOperatingStates radionuclideTransportBarriersStatus rcbConfigurations rcsParameters sscCapabilitiesChanges transitions?

    Properties

    activitiesLeadingToChanges: string[]

    Activities that may lead to changes in the parameters.

    availableInstrumentation: string[]

    Available instrumentation for key parameters to be monitored.

    description?: string

    Description of the plant evolution.

    evolutionConsiderations?: {
        availableMonitoringDevices: string[];
        hazardBarrierEffectivenessChanges?: string[];
        operatorActions: string[];
        propagationPathwayModifications?: string[];
        radionuclideTransportBarrierStatus: string[];
        reactorCoolantBoundaryConfigurations: string[];
        reactorCoolantSystemParameterRanges: string[];
        screeningStatus: ScreeningStatus;
        sscFragilityModifications?: string[];
        transitionParameters?: TransitionParameter[];
    }

    Considerations for plant evolution

    Type declaration

    • availableMonitoringDevices: string[]

      Available monitoring devices

    • OptionalhazardBarrierEffectivenessChanges?: string[]

      Hazard barrier effectiveness changes during transition Per RG 1.247, POS definitions should include consideration of changing plant conditions that may impair or change the effectiveness of hazard barriers

    • operatorActions: string[]

      Operator actions

    • OptionalpropagationPathwayModifications?: string[]

      Propagation pathway modifications during transition Per RG 1.247, POS definitions should consider changes that may affect propagation pathways

    • radionuclideTransportBarrierStatus: string[]

      Radionuclide transport barrier status

    • reactorCoolantBoundaryConfigurations: string[]

      Reactor coolant boundary configurations (e.g., vented, RCS penetrations, decay heat removal mechanism)

    • reactorCoolantSystemParameterRanges: string[]

      Reactor coolant system parameter ranges

    • screeningStatus: ScreeningStatus

      Screening status for these considerations

    • OptionalsscFragilityModifications?: string[]

      SSC fragility modifications during transition Per RG 1.247, POS definitions should consider changes that may modify fragilities of SSCs

    • OptionaltransitionParameters?: TransitionParameter[]

      Transition parameters that define changes between states Uses the reusable TransitionParameter interface

    POS-A2, POS-A9

    evolutionProperties?: { praMode: string; screeningStatus: ScreeningStatus }

    Descriptions of plant transitions with their PRA modes and screening status

    Type declaration

    • praMode: string

      PRA mode for this transition

    • screeningStatus: ScreeningStatus

      Screening status for this transition

    POS-A1

    initiatingEvents?: InitiatingEvent[]

    List of initiating events applicable to this evolution References to initiating events defined in the core/events module

    operatingModes: string[]

    Operating modes or operational conditions during the plant evolution.

    operationalAssumptions: string[]

    Operational assumptions on full power, shutdown, refueling, and startup conditions.

    plantOperatingStates: PlantOperatingState[]

    List of plant operating states within this evolution.

    radionuclideTransportBarriersStatus: string[]

    Status of radionuclide transport barriers.

    rcbConfigurations: string[]

    Reactor coolant boundary (RCB) configurations, such as vented or not vented.

    rcsParameters: {
        coolantInventory?: number;
        powerLevel?: number;
        pressure?: number;
        temperature?: number;
    }

    Range of RCS parameters (e.g., power level, temperature, pressure).

    sscCapabilitiesChanges: string[]

    Activities changing the capabilities of SSCs to support safety functions.

    transitions?: TransitionEvent[]

    Transitions between plant operating states within this evolution Captures the details and risks associated with state transitions

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