2011 Fukushima Dai-ichi nuclear power plant accident: summary of regional radioactive deposition monitoring results
2011 Fukushima Dai-ichi nuclear power plant accident: summary of regional radioactive deposition monitoring results
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DOI：
10.1016/j.jenvrad.2011.09.003
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发表时间：
2012-09-01
影响因子：
2.3
通讯作者：
Hirose, Katsumi
中科院分区：
文献类型：
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作者：
Hirose, Katsumi
2011年3月11日日本东部大地震及其引发的海啸之后，福岛第一核电站发生了严重事故。大量放射性核素被释放到大气和海洋中。日本县政府已经开展了环境放射性监测、外部剂量率、环境样品中的放射性测量等工作。自2011年3月18日以来，在覆盖日本岛屿的45个站点收集了每日和每月的沉积样本，并测定了沉积样本中的放射性核素。我们总结了日本政府报告的放射性沉积数据，并研究了福岛衍生的放射性核素的沉积行为。结果显示，福岛衍生的放射性云团主要影响本州岛的中部和东部，尽管它影响了整个日本陆地地区和北太平洋西部。福岛来源的Cs-137的时间变化表明，福岛来源的Cs-137在距离福岛第一核电站300公里范围内的地点在大气中的表观停留时间约为10天。(C)2011爱思唯尔有限公司。
After the Great East Japan Earthquake and resulting Tsunami on March 11, 2011, serious accident of the Fukushima Dai-ichi Nuclear Power Plant has been occurred. Huge amounts of radionuclides were released in atmosphere and ocean. Japanese prefectural governments have carried out environmental radioactivity monitoring; external dose rate, radioactivity measurements in environmental samples and others. Since March 18, 2011, daily and monthly deposition samples were collected in 45 stations covering Japanese Islands and radionuclides in the deposition samples were determined. We summarize radioactive deposition data reported by Japanese Government and study the depositional behaviors of the Fukushima-derived radionuclides. The results revealed that Fukushima-derived radioactive cloud dominantly affected in the central and eastern part of Honshu-Island, although it affected all of Japanese land area and also western North Pacific. The temporal change of the Fukushima-derived Cs-137 revealed that the apparent atmospheric residence time of the Fukushima-derived Cs-137 in sites within 300 km from the Fukushima Dai-ichi NPPis about 10 d. (C) 2011 Elsevier Ltd. All rights reserved.