Abstracts of Annual Meeting of the Geochemical Society of Japan
Abstracts of Annual Meeting of the Geochemical Society of Japan
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Host: Abstracts of Annual Meeting of the Geochemical Society of Japan

Name : Abstracts of Annual Meeting of the Geochemical Society of Japan

Number : 68

Date : September 01, 2021 - September 15, 2021

Temporal variability of transuranic nuclide concentrations and activity ratios in seafloor sediments off the Fukushima Daiichi Nuclear Power Plant during 2012-2020
*Masatoshi Yamada, Shinji Oikawa, Yuhei Shirotani
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Keywords: Fukushima Daiichi Nuclear Power Plant accident, atmospheric nuclear weapons testing, transuranic nuclides, seafloor sediment, close-in fallout
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Pages 187-

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Abstract

Unprecedented amounts of radionuclides were released from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident and widespread radioactive contamination in the environment has occurred. The 238Pu, 239+240Pu, 241Am, 242Cm and 243+244Cm concentrations in seafloor surface sediments collected at three sampling stations off the FDNPP site during 2012-2020 were determined to elucidate the impacts of the FDNPP accident onto their concentrations in coastal sediments. The 239+240Pu, 241Pu and 241Am concentrations and 240Pu/239Pu atom ratios in a sediment core were also determined to identify the Pu sources.

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© 2021 by The Geochemical Society of Japan
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