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Evaluation of Hungarian monitoring results and source localization of the ~(106)Ru release in the fall of 2017

机译:评估2017年秋季匈牙利监测结果和〜(106)Ru释放的来源定位

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Anthropogenic Ru-106 has been detected in the environment from late September to early October 2017 by several European environmental radiological monitoring networks. The paper presents the comprehensive evaluation of Hungarian monitoring results related to the occurrence of Ru-106 in various environmental compartments (airborne particulates, deposition, plants, and terrestrial indicators), which was implemented to determine the temporal and spatial variation of the contaminant on a national scale and also to verify the findings based on the data arising from environmental monitoring at a local scale in Budapest. Difficulties in direct comparison of the diverse reported data were also considered; results arising from varied sampling periods were corrected with account taken of the relation between the sampling duration and 4-day-long plume residence (estimation based on the daily monitoring of air and backward trajectory analysis). Integrated analysis of air and deposition measurements and meteorological data was also performed; the deposition processes were investigated by establishing the correlations of activity concentrations measured in the atmosphere and in the deposition samples. In order to study the temporal distribution and spatial localization of the Ru-106 contamination and to interpret the measurements at ground level, backward trajectory analysis was performed with HYSPLIT model. The backward trajectory simulations suggested that the release had probably occurred during the last week of September 2017 from the geographical area between Volga and the Urals. In addition, assessment of the doses due to the Ru-106 release was implemented considering external exposure from cloudshine and groundshine and internal exposure via inhalation.
机译:2017年9月下旬至10月初,欧洲多个环境放射监测网络在环境中检测到人为的Ru-106。本文介绍了匈牙利监测结果的综合评估,该结果与Ru-106在各种环境隔室(空气中的颗粒物,沉积物,植物和陆地指标)中的发生有关,用于确定污染物在时间和空间上的变化。国家规模,并根据布达佩斯当地规模的环境监测数据验证结果。还考虑了直接比较各种报告数据的困难;考虑到采样持续时间与4天长的羽流停留时间之间的关系(根据每天对空气的监测和向后的轨迹分析进行估算),对由于采样时间不同而产生的结果进行了校正。还进行了空气和沉积物测量以及气象数据的综合分析;通过建立在大气中和沉积样品中测得的活性浓度的相关性来研究沉积过程。为了研究Ru-106污染物的时间分布和空间定位并解释地面测量结果,使用HYSPLIT模型进行了向后轨迹分析。向后的轨迹模拟表明,释放可能发生在2017年9月的最后一周,伏尔加河和乌拉尔河之间的地理区域。此外,考虑到来自云雾和地面的外部暴露以及通过吸入的内部暴露,评估了Ru-106释放引起的剂量。

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