Ruthenium-106 event (total gamma dose rates)

Between the end of September and early October 2017, several European networks involved in the monitoring of atmospheric radioactive contamination recorded 106Ru presence. Some regions of Central and Eastern Europe measured one-day mean activity concentrations up to 10-100 mBq/m³, although the resulting exposure were far below radiological concern. Based on the meteorological conditions and modelling analysis, the most plausible zone of release, lies in the Southern Ural region of Russia and possibly Northern Kazakhstan, although it continues unknown until today.

2017年9月末至10月初，欧洲多个大气放射性污染监测网络记录到106Ru（钌-106）的存在。中东欧部分地区测得的单日平均活度浓度最高可达10~100毫贝克勒尔每立方米（mBq/m³），尽管由此产生的辐射暴露剂量远低于放射学关注阈值。基于气象条件与模拟分析，最具可信度的释放源区位于俄罗斯南乌拉尔地区，或涉及哈萨克斯坦北部，但截至今日，该释放源的具体位置仍未明确。