An estimation of the radioactive 35S emitted into the atmospheric from the Fukushima Daiichi nuclear power plant by using a numerical simulation global transport

Sebastian O. Danielache, Chisato Yoshikawa, Antra Priyadarshi, Toshihiko Takemura, Yuichiro Ueno, Mark H. Thiemens, Naohiro Yoshida

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    We present a numerical study carried out with the SPRINTARS model modified to account for the radioactive decay of 35S compounds emitted from the Fukushima Daiichi nuclear power plant station after the hydrogen and vapor blast. The transport dynamics of the released material reproduced previous field observations. Four different emission scenarios were compared to the measurements of atmospheric 35S in sulfate collected in La Jolla, Tsukuba, Kashiwa and Yokohama. Linear regressions of the relation between emitted and transported material that reached the sampling sites were used to estimate the amount of 35S atoms and the amount of neutrons released in to the atmosphere. We estimate that a lower limit of 1.9 × 10 16 35S atoms sec-1 were released after the events in March and this flux dropped to 4-39 × 1014 35S atoms sec-1 at the end of the month. Based on this calculations we estimated a lower limit of 5.2 × 1021 slow neutrons m-2 sec-1 were emitted from the nuclear fuel rods to the sea water injected in the reactors after the events in March.

    元の言語英語
    ページ(範囲)335-339
    ページ数5
    ジャーナルGeochemical Journal
    46
    発行部数4
    DOI
    出版物ステータス出版済み - 1 1 2012

    All Science Journal Classification (ASJC) codes

    • Geophysics
    • Geochemistry and Petrology

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