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 .
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2014年第3期528-531,共4页
Atomic Energy Science and Technology
关键词
电离室
氚
监测
ionization chamber
tritium
measurement
