Cesium concentrations in various environmental media at Namie, Fukushima

Hegeds, M.*; Shiroma, Yoshitaka*; Iwaoka, Kazuki*; Hosoda, Masahiro*; Suzuki, Takahito*; Tamakuma, Yuki*; Yamada, Ryohei ; Tsujiguchi, Takakiyo*; Yamaguchi, Masaru*; Ogura, Koya*; Tazoe, Hirofumi*; Akata, Naofumi*; Kashiwakura, Ikuo*; Tokonami, Shinji*

The radioactivity of cesium in the water and sediments of two major rivers was measured along with airborne radioactivity in Namie Town, after the recent partial lift on the evacuation order in 2017. The observed concentrations were up to 384 11 mBq/L for $^{137}$ Cs in unfiltered water and 1.28 0.09 mBq/m $^{3}$ for $^{137}$ Cs in air, while the sediment had a maximum of 44900 23.4 Bq/kg for $^{137}$ Cs. The $^{134}$ Cs/ $^{137}$ Cs ratios indicate the main origin of the cesium in the sediment to be Unit 1 in good agreement with previous reports on the accident.

Language	:	English
Journal	:	Journal of Radioanalytical and Nuclear Chemistry
Volume	:	323
Number	:	1
Pages	:	p.197 - 204
Publication Year/Month	:	2020/01
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Paper URL	:	https://doi.org/10.1007/s10967-019-06942-7
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Keywords	:	福島第一原子力発電所事故; Fukushima Daiichi Nuclear Power Station Accident
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Registration No. : AA20190267
JAEA Abstracts No. : 48000119
Paper Submission No. : 22470

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