后处理厂气态流出物中I-129的光氧化气溶胶转化方法

Abstract

Abstract: I-129 is a typical emission nuclide in the gaseous effluent of spent fuel reprocessing, which will produce certain radiation hazards to the environment and human body. Therefore I-129 needs to be monitored. Until now online monitoring of I-129 in the gaseous effluent of spent fuel reprocessing plant is still vacant in China. Based on the existing aerosol online monitoring system, this paper designs an aerosol conversion device to solve the sampling problem of the aerosol online monitoring system, and provides a pre-sampling device and method for the online monitoring of gaseous I-129 in the gaseous effluent of the reprocessing plant by the subsequent linkage aerosol online monitoring technology. The aerosol conversion experiment was carried out by stable iodine instead of I-129, and the conversion efficiency of the device was measured under different conditions. Combined with the performance parameters of ICP-MS, the conversion efficiency of the aerosol conversion device and the loss rate of aerosol during the online monitoring process, the low detection limit range of the aerosol conversion device for the online monitoring of I-129 in gaseous effluent was preliminarily derived, which was compared with that of the international continuous monitoring low detection limit requirements. The preliminary low detection limit range of the aerosol conversion device for online monitoring of I-129 in gaseous effluent was compared with the international continuous monitoring low detection limit requirements, which verified the feasibility of the method and the better prospect and research value in the field of online monitoring of I-129 in reprocessed gaseous effluent.

Key words: on-line monitoring, spent fuel reprocessing, gaseous effluent, I-129, aerosol conversion, ICP-MS

CLC Number:

TL75+1

LIN Yibo, LUO Zhiping, WANG Chuangao, CHEN Ran. Photo-oxidation aerosol conversion of I-129 in gaseous effluent from reprocessing plants[J].RADIATION PROTECTION, 2025, 45(6): 586-594.

References

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Photo-oxidation aerosol conversion of I-129 in gaseous effluent from reprocessing plants

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