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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 [J Environ Radioact] 2012 Sep; Vol. 111, pp. 116-9. Date of Electronic Publication: 2011 Oct 19. - Publication Year :
- 2012
-
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 (134)Cs and (137)Cs activities using low-background γ-spectrometry. The (134)Cs and (137)Cs 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.<br /> (Copyright © 2011 Elsevier Ltd. All rights reserved.)
- Subjects :
- Cesium Radioisotopes analysis
Geography
History, 21st Century
Japan
Pacific Ocean
Radioactive Hazard Release statistics & numerical data
Seawater chemistry
Spectrometry, Gamma
Time Factors
Disasters
Earthquakes
Radiation Monitoring statistics & numerical data
Radioactive Fallout analysis
Radioactive Hazard Release history
Tsunamis
Water Pollutants, Radioactive analysis
Subjects
Details
- Language :
- English
- ISSN :
- 1879-1700
- Volume :
- 111
- Database :
- MEDLINE
- Journal :
- Journal of environmental radioactivity
- Publication Type :
- Academic Journal
- Accession number :
- 22015114
- Full Text :
- https://doi.org/10.1016/j.jenvrad.2011.09.012