...
首页> 外文期刊>Environmental Science & Technology >Post-Accident Sporadic Releases of Airborne Radionuclides from the Fukushima Daiichi Nuclear Power Plant Site
【24h】

Post-Accident Sporadic Releases of Airborne Radionuclides from the Fukushima Daiichi Nuclear Power Plant Site

机译:福岛第一核电站厂址事故后零星散发的放射性核素

获取原文
获取原文并翻译 | 示例
           

摘要

The Fukushima nuclear accident (March 11, 2011) caused the widespread contamination of Japan by direct deposition of airborne radionuclides. Analysis of weekly air filters has revealed sporadic releases of radionuclides long after the Fukushima Daiichi reactors were stabilized. One major discharge was observed in August 2013 in monitoring stations north of the Fukushima Daiichi nuclear power plant (FDNPP). During this event, an air monitoring station in this previously scarcely contaminated area suddenly reported Cs activity levels that were 30-fold above the background. Together with atmospheric dispersion and deposition simulation, radionuclide analysis in soil indicated that debris removal operations conducted on the FDNPP site on August 19, 2013 are likely to be responsible for this late release of radionuclides. One soil sample in the center of the simulated plume exhibited a high ~(90)Sr contamination (78 ± 8 Bq kg~(-1)) as well as a high ~(90)Sr/~(137)Cs ratio (0.04); both phenomena have usually been observed only in very close vicinity around the FDNPP. We estimate that through the resuspension of highly contaminated particles in the course of these earthmoving operations, gross ~(137)Cs activity of ca. 2.8 × 10~(11) Bq has been released.
机译:福岛核事故(2011年3月11日)通过直接沉积空中放射性核素而造成了日本的广泛污染。对每周空气过滤器的分析表明,在福岛第一核反应堆稳定之后很长一段时间内,放射性核素便会零星释放。 2013年8月,在福岛第一核电站(FDNPP)北部的监测站观测到一次主要排放。在这次事件中,这个以前很少被污染的地区的一个空气监测站突然报告说,其Cs活性水平比背景高出30倍。结合大气扩散和沉积模拟,土壤中的放射性核素分析表明,2013年8月19日在FDNPP现场进行的碎片清除操作可能是造成放射性核素延迟释放的原因。模拟羽状流中心的一个土壤样品表现出较高的〜(90)Sr污染(78±8 Bq kg〜(-1))和较高的〜(90)Sr /〜(137)Cs比(0.04) );通常仅在FDNPP附近非常观察到这两种现象。我们估计,通过在这些推土作业过程中重污染的颗粒的重悬,Ca的〜(137)Cs活度约为。释放了2.8×10〜(11)Bq。

著录项

  • 来源
    《Environmental Science & Technology》 |2015年第24期|14028-14035|共8页
  • 作者单位

    Colorado State University, Environmental and Radiological Health Sdences, Fort Collins, Colorado 80523, United States,Leibniz Universitaet Hannover, Institute of Radioecology and Radiation Protection, D-30419 Hannover, Germany,Institute of Environmental Radioactivity, Fukushima University, Fukushima 960-1296, Japan;

    Research Division of Atmospheric and Hydrospheric Disasters, Disaster Prevention Research Institute, Kyoto University, Uji 6110011, Japan;

    Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine, Kyoto 6068501, Japan;

    Graduate School of Arts and Sciences, The University of Tokyo, Meguro-ku, Tokyo 153-8902, Japan;

    Leibniz Universitaet Hannover, Institute of Radioecology and Radiation Protection, D-30419 Hannover, Germany;

    Laboratory of Ion Beam Physics, ETH Zuerich, CH-8093 Zuerich, Switzerland;

    Leibniz Universitaet Hannover, Institute of Radioecology and Radiation Protection, D-30419 Hannover, Germany;

    Laboratory of Ion Beam Physics, ETH Zuerich, CH-8093 Zuerich, Switzerland;

    Institute of Environmental Radioactivity, Fukushima University, Fukushima 960-1296, Japan;

    Research Division of Atmospheric and Hydrospheric Disasters, Disaster Prevention Research Institute, Kyoto University, Uji 6110011, Japan;

    Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine, Kyoto 6068501, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号