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自20世纪80年代，全球大气层核试验基本停止后，大气中的人工放射性核素浓度在逐年降低。但是，世界各国日益增加的核动力设施偶然发生的核事故也会对环境造成不同程度的放射污染，前苏联切尔诺贝利核电站发生的严重事故不仅污染了本土及欧洲各国的环境，而且对我国也产生了轻
Since the 1980s, when the global atmospheric nuclear test basically stopped, the concentration of artificial radionuclides in the atmosphere decreased year by year. However, accidental nuclear accidents in nuclear power facilities in various countries in the world also cause various levels of radioactive pollution to the environment. The serious accident at the Chernobyl nuclear power plant in the former Soviet Union not only polluted the environment of local and European countries, My country has also produced light