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首页> 外文期刊>Atmospheric environment >An air-mass trajectory study of the transport of radioactivity from Fukushima to Thessaloniki, Greece and Milan, Italy
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An air-mass trajectory study of the transport of radioactivity from Fukushima to Thessaloniki, Greece and Milan, Italy

机译：从福岛到希腊塞萨洛尼基和意大利米兰的放射性迁移的气团轨迹研究

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摘要

Analyses of ~(131)I,~(137)Cs and ~(134)Cs in airborne aerosols were carried out in daily samples at two different sites of investigation: Thessaloniki, Greece (40° N) and Milan, Italy (45° N) after the Fukushima accident during the period of March-April, 2011. The radionuclide concentrations were determined and studied as a function of time. The ~(131)I concentration in air over Milan and Thessaloniki peaked on April 3-4,2011, with observed activities 467 μBq m~3 and 497 μBq m~3, respectively. The ~(134)Cs/~(137)Cs activity ratio values in air were around 1 in both regions, related to the burn-up history of the damaged nuclear fuel of the destroyed nuclear reactor. The high ~(131)I/~(137)Cs ratio, observed during the first days after the accident, followed by lower values during the following days, reflects not only the initial release ratio but also the different volatility, attachment and removal of the two isotopes during transportation due to their different physico-chemical properties. No artificial radionuclides could be detected in air after April 28, 2011 in both regions of investigation. The different maxima of airborne ~(131)I and ~(134,137)Cs in these two regions were related to long-range air mass transport from Japan, across the Pacific and to Central Europe. Analysis of backward trajectories was used to confirm the arrival of artificial radionuclides following atmospheric transport and processing. HYSPLIT backward trajectories were applied for the interpretation of activity variations of measured radionuclides.
机译：在两个不同调查地点的每日样本中对空气中气溶胶中的〜（131）I，〜（137）Cs和〜（134）Cs进行了分析：希腊塞萨洛尼基（北纬40°）和意大利米兰（45°C） N）在2011年3月至4月的福岛事故之后。确定并研究了放射性核素的浓度随时间的变化。米兰和塞萨洛尼基上空的〜（131）I浓度在2011年4月3-4日达到峰值，观测到的活性分别为467μBqm〜3和497μBqm〜3。在两个区域中，空气中的〜（134）Cs /〜（137）Cs活度比值均约为1，这与被毁核反应堆被损坏的核燃料的燃尽历史有关。在事故发生后的头几天观察到较高的〜（131）I /〜（137）Cs比率，随后几天又观察到较低的比率，这不仅反映了初始释放比率，还反映了不同的挥发性，附着和去除两种同位素在运输过程中由于其不同的理化性质。 2011年4月28日之后，两个调查区域在空气中均未检测到人造放射性核素。这两个地区的空中〜（131）I和〜（134,137）Cs最大值的不同与从日本，跨太平洋和中欧的远程空中运输有关。使用向后轨迹的分析来确认人造放射性核素在大气运输和加工之后的到来。 HYSPLIT向后轨迹用于解释所测放射性核素的活度变化。

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  • 来源
    《Atmospheric environment》 |2013年第8期|163-170|共8页
  • 作者

    A. Ioannidou; E. Giannakaki; M. Manolopoulou; S. Stoulos; E. Vagena; C. Papastefanou; L Gini; S. Manenti; F. Groppi;

  • 作者单位

    Aristotle University of Thessaloniki, Physics Department, Nuclear Physics Laboratory, Thessaloniki 54124, Greece,University degli Studi di Milano and INFN, LASA Laboratory, Via F.lli Cervi 201,1-20090 Segrate (MI), Italy;

    Aristotle University of Thessaloniki, Physics Department, Laboratory of Atmospheric Physics, Thessaloniki 54124, Greece,Finnish Meteorological Institute, Kuopio Unit, Kuopio FI-70211, Finland;

    Aristotle University of Thessaloniki, Physics Department, Nuclear Physics Laboratory, Thessaloniki 54124, Greece;

    Aristotle University of Thessaloniki, Physics Department, Nuclear Physics Laboratory, Thessaloniki 54124, Greece;

    Aristotle University of Thessaloniki, Physics Department, Nuclear Physics Laboratory, Thessaloniki 54124, Greece;

    Aristotle University of Thessaloniki, Physics Department, Nuclear Physics Laboratory, Thessaloniki 54124, Greece;

    University degli Studi di Milano and INFN, LASA Laboratory, Via F.lli Cervi 201,1-20090 Segrate (MI), Italy;

    University degli Studi di Milano and INFN, LASA Laboratory, Via F.lli Cervi 201,1-20090 Segrate (MI), Italy;

    University degli Studi di Milano and INFN, LASA Laboratory, Via F.lli Cervi 201,1-20090 Segrate (MI), Italy;

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  • 正文语种 eng
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  • 关键词

    Nuclear accident; Fukushima accident; Radionuclides; Radioactive fallout; Back-trajectories;

    机译：核事故;福岛事故;放射性核素;放射性尘埃;后退轨迹;

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