Technical Elements Documentation
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    Interface AtmosphericDispersionAnalysis

    Represents the analysis of atmospheric transport and dispersion of radioactive materials.

    RCAD-A1

    const atmosphericAnalysis = {
      dispersionModel: "Gaussian Plume Model (e.g., AERMOD)",
      dispersionModelJustification: "AERMOD is suitable for near-field dispersion and can incorporate building downwash effects.",
      plumeRiseConsideration: "Plume rise was considered for high-energy releases using Briggs' equations.",
      buildingWakeEffectsConsideration: "Building wake effects were modelled using the PRIME algorithm within AERMOD.",
      terrainEffectsConsideration: "Terrain effects were addressed using the terrain preprocessor within AERMOD.",
      dispersionUncertainty: {
        sources: ["Wind direction variability", "Atmospheric stability classification"],
        assumptions: ["Neutral stability conditions are representative for the site"],
        alternatives: ["Lagrangian particle dispersion model for complex terrain"]
      },
      siteCharacteristicsConsidered: "Topographical data was used to adjust plume trajectories and dispersion coefficients.",
      meteorologicalDataSpecification: "Five years of hourly meteorological data were used.",
      receptorLocationsSpecification: "A polar grid extending to 50 miles with finer resolution near the site boundary.",
      uncertaintyAnalysisDescription: "Monte Carlo simulation was used to propagate meteorological uncertainties.",
      supportingDocumentationReferences: ["Appendix C of the main report", "Atmospheric Dispersion Model Validation Report"],
      modelLimitations: "The Gaussian plume model assumes flat terrain and may have limitations in complex terrain scenarios."
    };
    interface AtmosphericDispersionAnalysis {
        buildingWakeEffectsConsideration?: string;
        depositionModeling?: string;
        dispersionModel: string;
        dispersionModelJustification: string;
        dispersionUncertainty: {
            alternatives: string[];
            assumptions: string[];
            sources: string[];
        };
        dryDepositionParameters?: {
            depositionVelocities?: Record<string, number>;
            particleSizeDistribution?: string;
        };
        meteorologicalDataSpecification?: string;
        modelLimitations?: string;
        plumeRiseConsideration?: string;
        receptorLocationsSpecification?: string;
        siteCharacteristicsConsidered?: string;
        supportingDocumentationReferences?: string[];
        terrainEffectsConsideration?: string;
        uncertaintyAnalysisDescription?: string;
        wetDepositionParameters?: {
            precipitationData?: string;
            washoutCoefficients?: Record<string, number>;
        };
    }
    Index

    Properties

    buildingWakeEffectsConsideration? depositionModeling? dispersionModel dispersionModelJustification dispersionUncertainty dryDepositionParameters? meteorologicalDataSpecification? modelLimitations? plumeRiseConsideration? receptorLocationsSpecification? siteCharacteristicsConsidered? supportingDocumentationReferences? terrainEffectsConsideration? uncertaintyAnalysisDescription? wetDepositionParameters?

    Properties

    buildingWakeEffectsConsideration?: string

    Considerations for building wake effects on plume dispersion. Relevant to RCAD-A7.

    "Building wake effects were modelled using the PRIME algorithm within AERMOD." | "Building wake effects are not significant due to release location."
    depositionModeling?: string

    Description of deposition modeling for radionuclide particles. Required by HLR-RCAD-E.

    "Dry and wet deposition were modeled using deposition velocities and washout coefficients."
    dispersionModel: string

    The selected atmospheric dispersion model(s). Required by RCAD-A2.

    "Gaussian Plume Model (e.g., AERMOD)"

    RCAD-A1

    dispersionModelJustification: string

    Justification for the appropriateness of the selected dispersion model(s) for the source term and meteorological conditions. Required by RCAD-A2 (implicitly).

    "AERMOD is suitable for near-field dispersion and can incorporate building downwash effects."

    RCAD-C6

    dispersionUncertainty: {
        alternatives: string[];
        assumptions: string[];
        sources: string[];
    }

    Sources of model uncertainty, related assumptions, and reasonable alternatives for atmospheric dispersion. Required by RCAD-C6.

    dryDepositionParameters?: {
        depositionVelocities?: Record<string, number>;
        particleSizeDistribution?: string;
    }

    Dry deposition parameters.

    meteorologicalDataSpecification?: string

    Specifies the meteorological data used for the atmospheric dispersion calculations.

    "Refer to the Meteorological Data sub-element for details on the meteorological data used."

    RCAD-A4

    modelLimitations?: string

    Addresses any limitations of the atmospheric dispersion models used.

    "The Gaussian plume model assumes flat terrain and may have limitations in complex terrain scenarios."

    RCAD-F3

    plumeRiseConsideration?: string

    Considerations for plume rise due to thermal buoyancy and/or momentum effects. Relevant to RCAD-A4.

    "Plume rise was considered for high-energy releases using Briggs' equations." | "Plume rise is negligible for the modelled releases."

    RCAD-A7

    receptorLocationsSpecification?: string

    Specifies the grid or receptor locations used for calculating off-site concentrations and deposition.

    "A polar grid extending to 50 miles with finer resolution near the site boundary."

    RCAD-A8

    siteCharacteristicsConsidered?: string

    Describes how site-specific characteristics (e.g., topography, nearby structures) are considered in the atmospheric dispersion analysis.

    "Topographical data was used to adjust plume trajectories and dispersion coefficients. Building wake effects were modeled for releases near plant structures."

    RCAD-A2

    supportingDocumentationReferences?: string[]

    References to documentation of the input data, models, and results of the atmospheric transport and dispersion analysis.

    ["Appendix C of the main report", "Atmospheric Dispersion Model Validation Report"]

    RCAD-E7

    terrainEffectsConsideration?: string

    Considerations for the effects of complex terrain on plume transport and dispersion. Relevant to RCAD-A8.

    "Terrain effects were addressed using the terrain preprocessor within AERMOD." | "The site has relatively flat terrain, and these effects are minimal."
    uncertaintyAnalysisDescription?: string

    Describes the uncertainty analysis performed for the atmospheric transport and dispersion calculations.

    "Uncertainty in meteorological parameters (wind speed, stability class) was propagated through the dispersion model using Monte Carlo simulation."

    RCAD-D4

    wetDepositionParameters?: {
        precipitationData?: string;
        washoutCoefficients?: Record<string, number>;
    }

    Wet deposition parameters.

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