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134Cs and 137Cs activities in coastal seawater along Northern Sanriku and Tsugaru Strait, northeastern Japan, after Fukushima Dai-ichi Nuclear Power Plant accident
- Source :
-
Journal of Environmental Radioactivity . Sep2012, Vol. 111, p116-119. 4p. - Publication Year :
- 2012
-
Abstract
- Abstract: A total of 37 seawater samples were collected at 10 sites along the coastline of the Northern Sanriku and Tsugaru Strait, 250–450 km north of the Fukushima Dai-ichi Nuclear Power Plant in April–December 2009 and May–June 2011, and analyzed for 134Cs and 137Cs activities using low-background γ-spectrometry. The 134Cs and 137Cs activities measured in these samples in May 2011 were found to be 2–3 mBq/L and 2.5–4 mBq/L, respectively. By June, these values had decreased by 25–45%/month and 5–30%/month, respectively. These results can be plausibly explained by surface infusion of these isotopes into the sea by atmospheric transport from Fukushima and their subsequent reduction by water migration to off-shore and deeper regions. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 0265931X
- Volume :
- 111
- Database :
- Academic Search Index
- Journal :
- Journal of Environmental Radioactivity
- Publication Type :
- Academic Journal
- Accession number :
- 76495690
- Full Text :
- https://doi.org/10.1016/j.jenvrad.2011.09.012