离线产氚实验中氚在线监测系统的研制  

Development of Online Measurement System of Tritium in Out-of-pile Tritium Release Experiment

作　　者：孟丹[1] 陈志林[1] 常瑞敏[1] 穆龙[1] 王和义[1] 贺月虹[1] 吴冠银[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《原子能科学技术》2014年第3期528-531,共4页Atomic Energy Science and Technology

摘　　要：在增殖剂离线产氚实验中,如何准确实时测量回路中氚浓度和形态(HTO/HT)对于掌握产氚增殖剂氚释放行为,改进增殖剂的产氚性能非常重要。针对离线产氚回路中载气流量小、回路中气体量小以及载气为Ar等特点,基于流气式电离室原理研制了一套数字化氚浓度在线测量系统。该系统中电离室灵敏体积为50mL,数字化仪表可自控获取、处理及显示回路中的氚浓度。测试结果表明,在Ar气氛下,在35V左右,电离室即进入饱和区;该系统探测下限可达3.7×107 Bq/m3,能满足离线产氚实验中氚在线监测的要求。It is very important to accurately measure tritium concentration and morphol-ogy for mastering tritium release behavior of tritium production breeder and improving the performance of tritium production breeder in out-of-pile tritium release experiment . According to the characteristics of small flow of carrier gas ,small quantity of gas and argon as carrier gas ,based on the ionization chamber ,the digital online tritium meas-urement system was developed .The sensitive volume of ionization chamber is 50 mL , the digital instrument can automatically obtain the tritium concentration ,at the same time ,process and display it . T he results show that the saturated zone of ionization chamber is about 35 V in argon ,and the detection limit is 3.7 ＆#215; 107 Bq/m3 ,w hich is satisfactory for online tritium measurement in out-of-pile tritium release experiment .

关 键 词：电离室 氚 监测 

分 类 号：TL811[核科学技术—核技术及应用] TL751