确定核电厂气载放射性流出物排放限值的设计方法研究

为了使核电厂的气载放射性流出物排放所致环境公众辐射剂量满足法规标准要求,本文从辐射防护剂量限值、大气污染物扩散规律及核电厂源项特点等方面考虑,通过实例分析,探讨了确定核电厂气载放射性流出物排放限值(排放率、排放浓度、地面浓度限值)的设计方法,提出了限值的建议值,并与已有核电厂的气载流出物排放报警阈值进行了验证,确认了方法的合理性。

Method in defining radioactive airborne effluent emission limit value at nuclear power plant

In order to make the environmental public radiation dose caused by the nuclear power plant radioactive airborne effluents to meet regulatory requirements, this article discusses the design method of determining radioactive nuclear power plant airborne effluents control (exhaust velocity, exhaust concentration, ground concentration limit value) from the radiation dose limit value, the atmospheric pollutant dispersion law and nuclear power plant source characteristics,and provide a suggested limit value. The emission concentration limit determined by the above method is verified by existing nuclear power plant airborne effluent discharge alarm threshold, the rationality of the method is confirmed.