Isotopic ratio of radioactive iodine (129I/131I) released from Fukushima Daiichi NPP accident

• MIYAKE YASUTO

  Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo

• MATSUZAKI HIROYUKI

  Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo

• FUJIWARA TAKESHI

  Nuclear Professional School, School of Engineering, The University of Tokyo

• SAITO TAKUMI

  Nuclear Professional School, School of Engineering, The University of Tokyo

• YAMAGATA TAKEYASU

  Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo College of Humanities and Sciences, Nihon University

• HONDA MAKI

  College of Humanities and Sciences, Nihon University

• MURAMATSU YASUYUKI

  Department of Chemistry, Gakushuin University

書誌事項

タイトル別名

• Isotopic ratio of radioactive iodine (¹²⁹I/¹³¹I) released from Fukushima Daiichi NPP accident
• Isotopic ratio of radioactive iodine (129I/127I) released from Fukushima Daiichi NPP accident

抄録

In March 2011, there was an accident at the Fukushima Daiichi Nuclear Power Plant (NPP) and a discharge of radionuclides resulting from a powerful earthquake. Considering the impact on human health, the radiation dosimetry is the most important for ¹³¹I among radionuclides in the initial stage immediately following the release of radionuclides. Since ¹³¹I cannot be detected after several months owing to its short half-life (8 days), the reconstruction by ¹²⁹I (half-life: 1.57 × 10⁷ yrs) analysis is important. For this reconstruction, it is necessary to know the isotopic ratio of ¹²⁹I/¹³¹I of radioactive iodine released from the NPP. In this study, the ¹²⁹I concentration was measured in several surface soil samples collected around the Fukushima Daiichi NPP for which the ¹³¹I level had already been determined. The surface deposition amount of ¹²⁹I was between 15.6 and 6.06 × 10³ mBq/m² within the region 3.6 to 59.0 km distant from the NPP. ¹²⁹I and ¹³¹I data had good linear correlation and the average isotopic ratio was estimated to be ¹²⁹I/¹³¹I = 31.6 ± 8.9 as of March 15, 2011.

収録刊行物

• ＧＥＯＣＨＥＭＩＣＡＬ　ＪＯＵＲＮＡＬ

  ＧＥＯＣＨＥＭＩＣＡＬ　ＪＯＵＲＮＡＬ 46 (4), 327-333, 2012

  一般社団法人日本地球化学会

キーワード

• Fukushima
• iodine
• accelerator mass spectrometry
• isotopic ratio
• soil

詳細情報

• CRID: 1390001204554273792
• NII論文ID: 130004469335
• DOI: 10.2343/geochemj.2.0210
• COI: 1:CAS:528:DC%2BC38XhsleqsL3K
• ISSN: 18805973
• ISSN: 00167002
• 本文言語コード: en
• データソース種別:
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  • Crossref
  • CiNii Articles
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• 抄録ライセンスフラグ: 使用不可