Air radioactivity levels following the Fukushima reactor accident measured at the Laboratoire Souterrain de Modane, France

作者：Loaiza P^*; Brudanin V; Piquemal F; Reyss J L; Stekl I; Warot G; Zampaolo M

来源：Journal of Environmental Radioactivity, 2012, 114: 66-70.

DOI：10.1016/j.jenvrad.2012.03.003

• Nuclear reactor accidents
• Gamma-emitter fission products
• Low-background gamma-ray spectrometry

The radioactivity levels in the air of the radionuclides released by the Fukushima accident were measured at the Laboratoire Souterrain de Modane, in the South-East of France, during the period 25 March-18 April 2011. Air-filters from the ventilation system exposed for one or two days were measured using low-background gamma-ray spectrometry. In this paper we present the activity concentrations obtained for the radionuclides I-131, Te-132, Cs-134, Cs-137, Nb-95, Zr-95, Ru-106, Ba-140/La and Ru-103. The activity concentration of I-131 was of the order of 100 mu Bq/m(3), more than 100 times higher than the activities of other fission products. The highest activities of I-131 were measured as a first peak on 30 March and a second peak on 3-4 April. The activity concentrations of Cs-134 and Cs-137 varied from 5 to 30 mu Bq/m(3). The highest activity concentration recorded for Cs corresponded to the same period as for I-131, with a peak on 2-3 April. The results of the radioactivity concentration levels in grass and mushrooms exposed to the air in the Modane region were also measured. Activity concentrations of I-131 of about 100 mBq/m(2) were found in grass.

• 出版日期2012-12
• 单位中国地震局