核设施烟囱气态流出物取样系统气溶胶穿透效率试验研究  

Experimental research on aerosol penetration efficiency of gaseous effluents from stack sampling system in nuclear power plant

作　　者：杨屹[1] 沈福[1] 畅翔 孟丹[1] 商洁[1] 马弢[1] 杨柳[1] YANG Yi;SHEN Fu;CHANG Xiang;MENG Dan;SHANG Jie;MA Tao;YANG Liu(China Institute for Radiation Protection,Taiyuan 030006)

机构地区：[1]中国辐射防护研究院,太原03006

出　　处：《辐射防护》2020年第5期414-418,共5页Radiation Protection

摘　　要：核设施烟囱气态流出物的取样是否具有代表性,将直接影响流出物测量的准确性。气溶胶穿透效率是取样代表性的关键指标之一。本文介绍了取样系统气溶胶穿透效率的试验方法和试验要求,针对国内某在建核电站,开展了D a=10μm粒径下的穿透效率验证试验,其结果为48.42%;三级取样管线取消弯头,采用直管连接,通过此改进后取样管路的穿透效率提升至53.21%,满足标准中大于50%的要求。It will directly affect the accuracy of the effluents measurement that whether the sampling from the stack in nuclear facility is representative.Aerosol penetration efficiency is one of the key indicators of sampling representativeness.The method and requirements of aerosol penetration efficiency experiment in sampling system is introduced in this article.The penetration efficiency test with a particle size of D a=10μm was carried out for a nuclear power station under construction in China,and the result was 48.42%.The penetration efficiency increased to 53.21%after improving the sampling pipeline,greater than 50%,which meets the requirement of the relevant standard.

关 键 词：气态流出物 取样系统 取样代表性 气溶胶 穿透效率 

分 类 号：TL75[核科学技术—辐射防护及环境保护]