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Migration behavior of 134Cs and 137Cs in the Niida River water in Fukushima Prefecture, Japan during 2011–2012

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Abstract

Total radioactivity of 137Cs in water samples from the Niida River was 0.025–4.18 Bq/L during May 2011–November 2012. Higher radioactivity was found during May–September 2011 and after a high flow condition caused by a rain event in 2012. The particulate phase of 134Cs and 137Cs was 47–48 % for May–September 2011, 75–93 % in normal flow conditions and 86–91 % in high flow conditions after December 2011. These results indicate that the supply of 134Cs and 137Cs from the watershed differs from the early stage up to September 2011 and from the last stage.

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Acknowledgments

This study was partly funded by a Grant-in-Aid for Scientific Research No. 24310009 and 24110008 from the Ministry of Education, Culture, Sports, Science and Technology of Japan.

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Authors and Affiliations

  1. Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Wake, Nomi, Ishikawa, 923-1224, Japan

    Seiya Nagao, Shinya Ochiai, Mutsuo Inoue & Masayoshi Yamamoto

  2. Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa, 920-1192, Japan

    Masaki Kanamori

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  1. Seiya Nagao
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  2. Masaki Kanamori
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  3. Shinya Ochiai
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  4. Mutsuo Inoue
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  5. Masayoshi Yamamoto
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Correspondence to Seiya Nagao.

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Nagao, S., Kanamori, M., Ochiai, S. et al. Migration behavior of 134Cs and 137Cs in the Niida River water in Fukushima Prefecture, Japan during 2011–2012. J Radioanal Nucl Chem 303, 1617–1621 (2015). https://doi.org/10.1007/s10967-014-3686-9

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  • DOI: https://doi.org/10.1007/s10967-014-3686-9

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