Radioactivity in the Risø District January-June 2009

Sven Poul Nielsen, Jytte Lene Clausen, Arne Miller

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    The environmental surveillance of the Risø environment was continued in January - June 2009. The mean concentrations in air were: 0.49±0.27 μBq m–3 of 137Cs, 3.62±1.42 mBq m–3 of 7Be and 0.24±0.15 mBq m–3 of 210Pb (±1 S.D.; N = 26). The depositions by precipitation at Risø in the first half of 2009 were: 0.064 Bq m–2 of 137Cs, 381 Bq m–2 of 7Be, 22.7 Bq m–2 of 210Pb and <1.0 kBq m–2 of 3H. The average background dose rate (TLD) at Risø (Zone I) was 83 nSv h–1 compared with 65±5 nSv h–1 (±1 S.D.; N = 4) in the four zones around Risø.
    Original languageEnglish
    Place of PublicationRoskilde
    PublisherDanmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi
    Number of pages24
    ISBN (Print)978-87-550-3790-8
    Publication statusPublished - 2009
    SeriesDenmark. Forskningscenter Risoe. Risoe-R


    • Radioecology and tracer studies
    • Nuclear technologies
    • Risø-R-1708
    • Risø-R-1708(EN)


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