論文

査読有り
2018年

Analysis of two forms of radioactive particles emitted during the early stages of the Fukushima Dai-ichi Nuclear Power Station accident

GEOCHEMICAL JOURNAL
  • Yukihiko Satou
  • ,
  • Keisuke Sueki
  • ,
  • Kimikazu Sasa
  • ,
  • Hideki Yoshikawa
  • ,
  • Shigeo Nakama
  • ,
  • Haruka Minowa
  • ,
  • Yoshinari Abe
  • ,
  • Izumi Nakai
  • ,
  • Takahiro Ono
  • ,
  • Kouji Adachi
  • ,
  • Yasuhito Igarashi

担当区分
筆頭著者, 責任著者
52
2
開始ページ
137
終了ページ
143
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.2343/geochemj.2.0514
出版者・発行元
GEOCHEMICAL SOC JAPAN

Two types of radioactive particles were isolated from environmental samples collected at various distances from the Fukushima Dai-ichi Nuclear Power Station. "Type A" particles are 2-10 mu m in diameter and display characteristic Cs X-ray emissions when analyzed using energy-dispersive X-ray spectrometry (EDS). "Type B" particles are considerably larger, up to 400 mu m in diameter, with Cs concentrations too low to be detectable with EDS. These larger particles were isolated from the region north of the nuclear reactor site, which was contaminated on March 12, 2011. The specific activity of Type B particles is much lower than Type A, and the mean Cs-134/Cs-137 ratios are similar to 0.93 and 1.04, respectively. The Type B ratio indicates that power station Unit 1 is the source, implying that these larger radioactive particles were discharged on March 12. This study found that different type of radioactive particles were released not only on March 15 but also on March 12.

Web of Science ® 被引用回数 : 27

リンク情報
DOI
https://doi.org/10.2343/geochemj.2.0514
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000431554900007&DestApp=WOS_CPL

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