多孔吸附介质对^(133)Xe的采样浓集效果研究  

^(133)Xe adsorption and sampling concentration properties evaluation

作　　者：刘玮 吕雪艳 全葳 喻正伟 王海鹏 LIU Wei;LV Xueyan;QUAN Wei;YU Zhengwei;WANG Haipeng(Nuclear and Radiation Safety Center,MEE,Beijing 102400)

机构地区：[1]生态环境部核与辐射安全中心,北京102400

出　　处：《辐射防护》2021年第5期422-427,共6页Radiation Protection

摘　　要：在我国压水堆核电厂的惰性气体排放中,^(133)Xe为关键源项。在大气及核设施气态流出物中,放射性氙同位素所占的体积比极低。因此对于放射性氙的监测,需要前端增加采样量。本文主要对空气中氙组分采样浓集技术进行研究,选取多种材料进行空气中氙吸附行为和吸附容量的测试,并对其在现场采样实验室分析中的应用效果进行了理论计算。结果表明特定粒度的竹炭和椰壳炭对氙吸附浓集效果较好,可有效降低流出物中惰性气体取样的探测限。^(133)Xe is considered as a key source term in the noble gas discharge from pressurized water reactor(PWR)power plants in China.Radioactive xenon isotopes contribute only a low volume concentration in atmosphere and gaseous effluent from nuclear facilities.Therefore,increasing sampling volume is necessary for radioactive xenon monitoring.This article describes research on xenon sampling concentrating technology in the air.Some experiments on various selected materials to test their Xe adsorption behaviors were carried out and their application effect in laboratory sampling were calculated.The result shows bamboo charcoal and coconut shell charcoal in particular granularity perform well in xenon adsorption,which can decrease the detection limit of noble gas sampling in radioactive effluents.

关 键 词：^(133)Xe 流出物监测 采样分析 

分 类 号：TL751[核科学技术—辐射防护及环境保护]