Radioactivity in the Risø District January-June 2014

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    The environmental surveillance of the Risø environment was continued in January-June 2014. The mean concentrations in air were: 0.47±0.45 μBq m–3 of 137Cs, 2.96±1.33 μBq m–3 of 7Be and 0.27±0.24 μBq m–3 of 210Pb (±1 S.D.; N = 26). The depositions by precipitation at Risø in the first half of 2013 were: 0.086 Bq m–2 of 137Cs, 433 Bq m–2 of 7Be, 39.9 Bq m–2 of 210Pb and < 0.8 kBq m–2 of 3H. The average background dose rate (TLD) at Risø (Zone I) was measured as 107 nSv h–1 compared with 91 ± 6 nSv h–1 (±1 S.D.; N = 4) in the four zones around Risø.
    The TLD measurement results for this reporting period show a greater background level than normally expected. This is probably caused by unresolved measurement problems, and work is ongoing to identify and solve these problems.
    Original languageEnglish
    PublisherDTU Nutech
    Number of pages24
    ISBN (Electronic)978-87-995321-9-3
    Publication statusPublished - 2014


    • DTU-Nutech-R-0009(EN)
    • DTU-Nutech-R-0009
    • DTU-Nutech-R-9
    • DTU-Nutech-9(EN)
    • DTU-Nutech-9


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