新型氚蒸馏装置的研制及性能验证  

Performance Test on a New Tritium Distillation-collect System

作　　者：周银行[1] 余卫国[1] 丁兰岚[1] 胥全敏[1] 郭洪波[1] 林青川[1] 钟志京[1] 王和义[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：《核电子学与探测技术》2012年第5期511-513,594,共4页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金资助项目(11075134)

摘　　要：为提高硅胶吸附法监测环境空气中氚的样品前处理效率,采用铸铝加热方式结合温度自动控制技术,研制了一种用于环境硅胶样品自动化氚水蒸馏的装置。经实验验证,该装置选择250℃的加热温度,15 min的蒸馏冷凝收集时间为硅胶吸附氚化水的最佳解析条件,此时对硅胶中氚化水的平均回收率大于99%,氚记忆效应小于0.2‰,100 g饱和硅胶样品能解析水7～10 ml,满足液闪测量要求,研制的氚水蒸馏装置较以往装置蒸馏效率提高了近3倍,能耗减少约77%。A tritium distillation - collect system for air sample from environment is constructed for silica gel ad- sorbing - tritiated water sample with a novel structure, auto - controled temperature technique and alu minum founding materials. The whole performance was confirmed, and silica gel adsorbing - tritiated water sample from environmental air was operated in the system, a series of experiments were completed which showed the best sample treatment time was 15 min, allowing a desorption water quantity of 7 ~ 10 ml from 100 g silica gel liquid scintillation analysis sample and the average recycle efficiency could reach 99% when the heating temperature was 250℃. The experiment proves the memory effect of tritium was under 0.2%, and the distillation efficiency of this new system raised more than 3 times, saving 77% eletricity expend incidentally.

关 键 词：环境氚 硅胶 氚蒸馏 氚收集 HTO 

分 类 号：X837[环境科学与工程—环境工程]