Temporal variation of iodine-129 in rainwater at Tsukuba before and after the Fukushima Daiichi Nuclear Power Plant accident

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<p>Rainwater has been sampled on a monthly basis at the University of Tsukuba, Japan, since 2009. The serious accident at the Fukushima Daiichi Nuclear Power Plant in March 2011 resulted in the atmospheric emission of large quantities of radionuclides. Monthly <sup>129</sup>I deposition was monitored for 19 months before and 41 months after the accident to estimate its influence at Tsukuba. Before the accident, <sup>129</sup>I concentration in rainwater was in the range (0.19–2.6) × 10<sup>8</sup> atoms L<sup>–1</sup>. There was a rapid increase after the accident, with the highest <sup>129</sup>I concentration recorded in March 2011 as (5.4 ± 0.8) × 10<sup>10</sup> atoms L<sup>–1</sup>. It took approximately 1 y for the <sup>129</sup>I concentration to return to pre-accident background levels, due to continuing resuspension and deposition. Measured decreases in <sup>129</sup>I concentration in rainfall showed good agreement with double-exponential modeling.</p>

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  • GEOCHEMICAL JOURNAL

    GEOCHEMICAL JOURNAL 52(2), 155-162, 2018

    一般社団法人日本地球化学会

各種コード

  • NII論文ID(NAID)
    130006708580
  • NII書誌ID(NCID)
    AA00654975
  • 本文言語コード
    ENG
  • ISSN
    0016-7002
  • NDL 記事登録ID
    028933181
  • NDL 請求記号
    Z53-R488
  • データ提供元
    NDL  J-STAGE 
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