論文

査読有り
2010年4月

The vertical profiles of iodine-129 in the Pacific Ocean and the Japan Sea before the routine operation of a new nuclear fuel reprocessing plant

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
  • Takashi Suzuki
  • ,
  • Masayuki Minakawa
  • ,
  • Hikaru Amano
  • ,
  • Orihiko Togawa

268
7-8
開始ページ
1229
終了ページ
1231
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.nimb.2009.10.140
出版者・発行元
ELSEVIER SCIENCE BV

Anticipating the release of I-129 from a new spent nuclear fuel reprocessing plant at Rokkasho in Japan, the levels of I-129 in seawater before its operation were measured at the western North Pacific Ocean and the Japan Sea from surface to bottom.
Iodine isotopic ratios (I-129/I-127) in surface seawater at the offshore of Kushiro, the Japan Basin and the Yamato Basin were (7.1 +/- 0.3) x 10(-11), (5.8 +/- 0.2) x 10(-11) and (4.6 +/- 0.2) x 10(-11), respectively. The I-129/I-127 in the deep layer at the offshore of Kushiro below 1500 m depth was constant and its ratio was (1.5 +/- 0.4) x 10(-12). Since this ratio agreed with the natural origin I-129/I-127 corresponding to (1.5 +/- 0.015) x 10(-12), the anthropogenic I-129 have not invaded the deep layer below this depth. On the other hand, I-129/I-127 in the bottom layer below 2000 m depth at the Japan Basin and Yamato Basin was also constant but their ratios were (7.1 +/- 0.8) x 10(-12) and (9.1 +/- 0.6) x 10(-12), respectively. Taking, account of the natural I-129/I-127 anthropogenic I-129 was intruded into the basin bottom of the Japan Sea, completely. Furthermore, the inventory of anthropogenic I-129 for the Japan Basin and Yamato Basin was three times higher than that in the offshore of Kushiro. These results would be due to the characteristics for the ocean circulation and the bottom topography in the Japan Sea. (C) 2009 Elsevier B.V. All rights reserved.

Web of Science ® 被引用回数 : 24

リンク情報
DOI
https://doi.org/10.1016/j.nimb.2009.10.140
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000277462300135&DestApp=WOS_CPL
ID情報
  • DOI : 10.1016/j.nimb.2009.10.140
  • ISSN : 0168-583X
  • Web of Science ID : WOS:000277462300135

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