134Cs and 137CS activities in coastal seawater along Northern Sanriku and Tsugaru Strait, northeastern Japan, after Fukushima Dai-ichi Nuclear Power Plant accident

被引：47

作者：

Inoue, M. ^{[1
]}

Kofuji, H. ^{[2
]}

Hamajima, Y. ^{[1
]}

Nagao, S. ^{[1
]}

Yoshida, K. ^{[1
]}

Yamamoto, M. ^{[1
]}

机构：

[1] Kanazawa Univ, Low Level Radioact Lab, Inst Nat & Environm Technol, Nomi, Ishikawa 9231224, Japan

[2] Japan Marine Sci Fdn, Minato Ku, Mutsu, Aomori 0350064, Japan

来源：

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY | 2012年 / 111卷

关键词：

Cs-134; Cs-137; Coastal seawater; Northern Sanriku; Fukushima Dai-ichi Nuclear Power Plant accident;

D O I：

10.1016/j.jenvrad.2011.09.012

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A total of 37 seawater samples were collected at 10 sites along the coastline of the Northern Sanriku and Tsugaru Strait, 250-450 km north of the Fukushima Dai-ichi Nuclear Power Plant in April-December 2009 and May June 2011, and analyzed for Cs-134 and Cs-137 activities using low-background gamma-spectrometry. The Cs-134 and Cs-137 activities measured in these samples in May 2011 were found to be 2-3 mBq/L and 2.5-4 mBq/L, respectively. By June, these values had decreased by 25-45%/month and 5-30%/month, respectively. These results can be plausibly explained by surface infusion of these isotopes into the sea by atmospheric transport from Fukushima and their subsequent reduction by water migration to off-shore and deeper regions. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：116 / 119

页数：4

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