State Institution «National Research Center for Radiation Medicine of the National Academy of Medical Sciences of Ukraine», 53 Yuriia Illienka Str., Kyiv, 04050, Ukraine.
Research Institute for Radiation Protection of the Academy of Technological Sciences of Ukraine, 55 Vatutina St., Vyshgorod, 07300, Ukraine.
Probl Radiac Med Radiobiol. 2021 Dec;26:124-140. doi: 10.33145/2304-8336-2021-26-124-140.
The key factors identification in radiation dose formation in population of radiologically contaminatedareas of Rivne oblast in the current period of accident through comprehensive radiation and hygienic monitoring inreference settlements in 2020 and estimation of their impact on dose formation were the study objectives.
Comprehensive radiation and hygienic monitoring of settlements in Rivne oblast(province) was provided in Stare Selo, Vezhytsia, Perekhodychi, and Drozdyn villages of Rokytne district, where thehighest radiation doses were registered after the ChNPP accident. Studies were conducted in September 2020.Measurements (n=696, 318 adults, and 378 children) were performed using the whole body counters (WBC) to deter-mine the internal radiation doses. The 48 samples of milk, 45 samples of potatoes and vegetables, and 35 samplesof wild products were collected in local farms and measured for the 137Cs and 90Sr content. Residents of the studiedsettlements (n=229, 140 adults, and 89 children) were interviewed about the levels of consumption of staple food-stuffs. External radiation doses were evaluated in all the studied settlements. Mathematical, dosimetric, and radio-chemical methods were applied.
Annual effective radiation doses of the Rivne oblast population in 2020 were formedmainly due to internal radiation ones that not exceeded 1.24 mSv · year-1 in adults and 0.65 mSv · year-1 in childrenagainst the RCT criterion of 1 mSv · year-1. Further 1.2-1.9-fold decrease in the annual internal radiation doses vs.the results of WBC-monitoring in autumn of 2017 was registered in the surveyed settlements. The latter confirmeda time pattern of radiation levels gradual reduction at the current stage of Chornobyl accident since 2011. Intakeof 137Cs with milk and wild mushrooms, which traditionally occupy a significant part of diet in the Rivne Polissya areaand have consistently high levels of radioactive cesium contamination, remains a key factor of internal radiationdose forming in residents of the surveyed settlements of Rivne oblast.
通过在 2020 年参考定居点进行全面辐射和卫生监测，确定当前事故期间里夫尼地区放射性污染地区人群中辐射剂量形成的关键因素，并评估其对剂量形成的影响。
在罗基特涅区的斯塔雷塞洛、韦日齐亚、佩雷克霍季奇和德罗兹迪琴村进行里夫尼州（省）的全面辐射和卫生监测，这些村庄是切尔诺贝利事故后记录到最高辐射剂量的地方。研究于 2020 年 9 月进行。使用全身计数器 (WBC) 进行测量（n=696，318 名成人，378 名儿童），以确定内部辐射剂量。在当地农场收集了 48 份牛奶样本、45 份土豆和蔬菜样本以及 35 份野生产品样本，以测量 137Cs 和 90Sr 的含量。对研究定居点的居民（n=229，140 名成人，89 名儿童）进行了关于主食消费水平的访谈。对所有研究定居点进行了外部辐射剂量评估。应用了数学、剂量学和放射性化学方法。
2020 年里夫尼地区人口的年有效辐射剂量主要由内部辐射形成，成人不超过 1.24 毫希沃特·年-1，儿童不超过 0.65 毫希沃特·年-1，低于 1 毫希沃特·年-1 的 RCT 标准。与 2017 年秋季 WBC 监测结果相比，调查定居点的年内部辐射剂量进一步降低了 1.2-1.9 倍。这证实了自 2011 年以来，在切尔诺贝利事故的当前阶段，辐射水平呈逐渐降低的时间模式。摄入牛奶和野生蘑菇中的 137Cs，这些在里夫尼波利斯亚地区的饮食中占据重要地位，且放射性铯污染水平一直很高，仍然是调查定居点居民内部辐射剂量形成的关键因素。
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