Journal
APPLIED RADIATION AND ISOTOPES
Volume 81, Issue -, Pages 340-343Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2013.03.084
Keywords
Radiocesium; Fukushima Dai-ichi Nuclear Power Plant accident; Deposition; Water circulation; Riverine discharge
Categories
Funding
- Ministry of Education, Culture, Sports, Science and Technology [24510011]
- Grants-in-Aid for Scientific Research [24510011, 24110008] Funding Source: KAKEN
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Our method based on low background gamma-spectrometry enabled the measurement of low radiocesium concentrations in only 20 L of seawater. In May 2011 after deposition of radiocesium, Cs-134 concentration in surface water within the Sea of Japan was confirmed to be significantly small ( <0.1-1 mBq/L) by the method. The concentration was not detected (< 0.1 mBq/L) below 50 m depth. The Fukushima-derived radiocesium migrated from the surface water of the Sea of Japan without advection to below the thermocline. (C) 2013 Elsevier Ltd. All rights reserved.
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