Method for analyzing radioactive iodine in gaseous effluent

The invention provides a method for analyzing radioactive iodine in gaseous effluent, which comprises the following steps: taking an iodine box, and sampling the gaseous effluent according to a preset sampling time under a preset sampling flow to obtain a to-be-detected iodine box; the iodine box to be detected is subjected to sample detection, and a gamma energy spectrum diagram of the iodine box to be detected is obtained; and calculating the activity concentration of 129I and 131I according to the gamma energy spectrum diagram and the detection efficiency scale curve. According to the method for analyzing the radioactive iodine in the gaseous effluent, the blank of monitoring and analyzing 129I and 131I in the gaseous effluent is filled, and the activity concentration of 129I and 131I can be accurately analyzed. 本发明提供一种气态流出物中放射性碘的分析方法，包括：取碘盒，在预设取样流量下，按照预设取样时间进行气态流出物的取样，得到待测碘盒；对所述待测碘盒进行测样，获得所述待测碘盒的γ能谱图；根据所述γ能谱图、探测效率刻度曲线，计算129I、131I的活度浓度。本发明的气态流出物中放射性碘的分析方法，填补了气态流出物中129I、131I监测分析的空白，能够准确分析出129I、131I的活度浓度。