Cloud gamma modelling in the UK Met Office's NAME III model

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    7 Citations (Scopus)

    Abstract

    In the United Kingdom radionuclides are discharged to the environment from a range of controlled sources, under a system of authorisation and regulation. Radiological assessments are performed for a wide range of controlled release applications, including assisting in the provision of advice and guidance to regulatory bodies responsible for setting discharge limits. Such limits are granted to nuclear licensed sites and non-nuclear operators such as universities and hospitals, many of which discharge to the atmosphere, resulting in a range of potential routes of exposure of an individual or a population. One such route, external exposure to gamma rays irradiating directly from a dispersing plume and referred to as 'cloud gamma', may contribute significantly to dose if the radionuclides discharged are strong gamma emitters or are noble gases (which do not deposit, thus limiting the number of potential exposure pathways). The nature of cloud gamma modelling necessitates full integration within a dispersion model, unlike other exposure pathways which may be considered subsequent to the dispersion modelling. The inclusion of the ability to estimate cloud gamma dose in the Met Office's Lagrangian Particle Dispersion model, NAME III, is necessary for use in comprehensive assessments of the consequences and risks of a radiological release to atmosphere. This paper describes the cloud gamma modelling approaches implemented within NAME III, details the testing and validation performed, and considers potential applications and future work.

    Original languageEnglish
    Title of host publicationHARMO 2010 - Proceedings of the 13th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes
    EditorsArmand Albergel
    PublisherARIA Technologies
    Pages441-444
    Number of pages4
    ISBN (Electronic)9782868150622
    Publication statusPublished - 2010
    Event13th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2010 - Paris, France
    Duration: 1 Jun 20104 Jun 2010

    Publication series

    NameHARMO 2010 - Proceedings of the 13th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes

    Conference

    Conference13th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2010
    Country/TerritoryFrance
    CityParis
    Period1/06/104/06/10

    Keywords

    • Cloud gamma
    • Lagrangian
    • Modelling
    • NAME
    • Radionuclide

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