Spatial and temporal changes of 137Cs concentrations derived from nuclear power plant accident in river waters in eastern Fukushima, Japan during 2012–2014

Concentrations of 137 Cs measured in water collected from seven rivers under base-flow conditions in eastern Fukushima Prefecture in 2014 were combined with previously reported data for the same sampling points from 2012 to 2013. Dissolved 137 Cs concentrations at the sampling points were strongly c...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2016-03, Vol.307 (3), p.2167-2172
Main Authors: Ochiai, Shinya, Ueda, Shinji, Hasegawa, Hidenao, Kakiuchi, Hideki, Akata, Naofumi, Ohtsuka, Yoshihito, Hisamatsu, Shun’ichi
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Hadrons
Heavy Ions
Inorganic Chemistry
Nuclear Chemistry
Nuclear Physics
Physical Chemistry
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Summary:Concentrations of 137 Cs measured in water collected from seven rivers under base-flow conditions in eastern Fukushima Prefecture in 2014 were combined with previously reported data for the same sampling points from 2012 to 2013. Dissolved 137 Cs concentrations at the sampling points were strongly correlated with the 137 Cs inventories of the corresponding catchment areas. The ratios of the dissolved 137 Cs concentrations to the 137 Cs inventories have declined exponentially since the 2011 Fukushima nuclear power plant accident with an effective decreasing coefficient of 0.40 y −1 (effective half-time of 1.7 y), within the range reported in European rivers following the Chernobyl accident.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-015-4442-5