Background radiation dose-rates to non-human biota in a high mountain habitat in Norway

J.E. Brown, R. Gelsvik, J.A. Kålås, Per Roos

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    Determination of background radiation dose-rates is important in the process of assessing risks to the environment from exposure to human activities both in terms of deriving the incremental dose-rate and as a point of reference for evaluating the significance of the exposure level. A consideration of the available literature on naturally occurring radionuclides in wild plants and animals quickly illustrates a paucity of data coverage in numerous cases. Most notable is the lack of comprehensive information for the important dose-forming radionuclides such as 210Po and 210Pb. In order to collate data concerning these radioisotopes for components of the ecosystem, field work was conducted in a semi-natural, mountainous location in central Norway. Preliminary (since no correction was made for ingrowth from 210Pb) whole-body activity concentrations of 210Po in 2 species of small mammal were commensurate with activity concentrations reported for reindeer muscle sampled at proximate locations, falling at a level of some 10s of Bq kg-1 by fresh weight. Statistical analyses of the data showed that bank vole and shrew 210Po data constitute different populations with different mean ranks. Unweighted dose-rates attributable to the presence of internally distributed 210Po were calculated to be 0.07 μGy h-1 for Bank vole.
    Original languageEnglish
    JournalRadioprotection - Revue de la Societé Francaise de Radioprotection
    Volume44
    Issue number5
    Pages (from-to)197-202
    ISSN0033-8451
    DOIs
    Publication statusPublished - 2009
    EventECORAD 2008 International Conference on Radioecology and Environmental Radioactivity - Bergen, Norway
    Duration: 15 Jun 200820 Jun 2008

    Conference

    ConferenceECORAD 2008 International Conference on Radioecology and Environmental Radioactivity
    CountryNorway
    CityBergen
    Period15/06/200820/06/2008

    Keywords

    • Radioecology and tracer studies
    • Nuclear technologies

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