气体膜分离技术对氙的富集效果研究  

Xenon enrichment effect by gas membrane separation technology

作　　者：刘玮 吕雪艳 全葳 喻正伟 王海鹏 LIU Wei;LYU Xueyan;QUAN Wei;YU Zhengwei;WANG Haipeng(Nuclear and Radiation Safety Center,MEE,Beijing 102488,China)

机构地区：[1]生态环境部核与辐射安全中心,北京102488

出　　处：《哈尔滨工程大学学报》2022年第11期1611-1614,共4页Journal of Harbin Engineering University

摘　　要：针对我国核设施放射性惰性气体监测存在探测下限远大于实际取样点活度的问题,有必要增加气体的采样量。为了富集气载流出物中放射性氙同位素,本文选取了一种氮氧分离膜、设计搭建了一套气体膜分离富集实验装置。在不同采样倍数下进行空气中氙浓集效果的测试,通过比较采样倍数,对空气中氙组分的气体膜富集效果进行了研究,并对其在现场采样实验室分析中探测下限的影响进行了理论计算。经测试利用空气膜分离技术,在采样倍数为124.2时,可将气载流出物取样中放射性氙的取样量增大至约15倍,进而将放射性氙的探测限降低约15倍。Increasing the gas sampling amount is necessary to solve the substantially higher lower detection limit of radioactive inert gas monitoring in nuclear facilities in China than its actual sampling activity.A nitrogen and oxy-gen separation membrane is selected to design and set up a set of experimental devices for xenon separation and en-richment to improve radioactive xenon isotope in the airborne effluent.The concentration effect of xenon in the air was tested under different sampling multiples.The gas film enrichment effect of xenon in the air was studied by comparing the sampling multiples,and the influence of the lower detection limit in the onsite sampling laboratory a-nalysis was theoretically calculated.Results showed that by using the air film separation technology,the amount of radioactive xenon sampled in the airborne effluent can be increased to approximately 15 times,thereby reducing the detection limit for radioactive xenon by approximately 15 times when the sampling multiple is 124.2.

关 键 词：133Xe 氙同位素 惰性气体 流出物监测 氙气浓缩 气体分离膜 辐射监测 富集特性 

分 类 号：X591[环境科学与工程—环境工程]