新型放射性气溶胶连续监测仪的研制  

The Research of a New Radioactive Aerosol Continuous Monitor

作　　者：牟长丽[1] 黄子瀚[1] 徐宏坤[1] 边江[1] 殷荫[1] 王戈[1] 

机构地区：[1]北京市射线应用研究中心,北京100015

出　　处：《核电子学与探测技术》2014年第9期1073-1078,共6页Nuclear Electronics & Detection Technology

摘　　要：针对环境低水平气溶胶连续监测中常常遇到的问题和难点，本项目采用自主研发的一种新型薄膜滤纸，及一种双工位取样测量装置（中国实用新型专利），并采用甄别能量的假符合方法（中国发明专利）等关键技术，研发了一种新型气溶胶连续监测仪。该仪器主要性能指标突出表现为其探测下限：当氡浓度最高为102～103 Bq／m^3时，对铀和钚的探测下限可达到0．05～0．08 Bq／m^3，对β的探测下限为5～10 Bq／m^3，最长测量时间为40～60 min，并且能实现实时在线连续监测。因此，该仪器可用于地下洞库或坑道内高氡环境中，快速准确并连续测量出低水平气溶胶浓度，也可用于核电站、放射性工作场所、核事故应急以及气态排出流中放射性气溶胶的快速连续监测。Regarding the problem and the difficulty of environment low radiation level aerosol continuous monito -ring , this project developed a kind of new membrane filter paper , and a device for sampling and measuring with double working positions （ a Chinese patent for utility models ） , and adopted some key technoligies like a spuri-ous coincidences method of screening energy （ a Chinese invention patent ） , and also developed a kind of new radioactive aerosol continuous monitoring instrument .One of the key performance indexes of the instrument is the low limit of detection：with the highest radon concentration at 102 -103 Bq/m^3 , the low limit of detecting u-ranium and plutonium would be at 0.05-0.08 Bq/m^3 , and the low limit of detecting βwould be at 5-10 Bq/m^3 , and the longest time of measuring is 40 min-60 min.Meanwhile, this instrument can continuously monitor online .Consequently , it can be used in the underground storage cavernes and tunnels with high level of radon concentration to monitor the low level of the aerosol concentration rapidly and precisely and continuously , and also it can be used in nuclear power station , radioactive workplace , and all of the places , monitoring the aerosol concentration rapidly and continuously from nuclear accident emergency and gaseous effluents .

关 键 词：放射性气溶胶 低水平浓度 连续监测 

分 类 号：TL817[核科学技术—核技术及应用]