手套箱气氛中氚化水处理的新工艺研究

Investigation on processing technology for tritiated water in glove box

用分子筛吸附柱和热金属镁床测试了分子筛床对气氛中水的吸附性能和热金属镁床对HTO的分解性能。结果表明 ,分子筛床对气氛中水的吸附效率 >99.99% ,在空气中水含量为 3.4× 10 3— 4 .2× 10 3μg·g- 1和空气通量达 5 6m3条件下 ,未发现吸附柱水的贯穿现象。热金属镁床对HTO的分解率 >99.9% ,在金属镁的消耗量大于 80 %时 。

A 0.5nm molecular sieve absorption column and a hot decomposing magnesium bed was found to be one of the effective means to collect and decompose HTO in glove box atmosphere. The absorption characteristics of the 0.5nm molecular sieve column and water decomposing characteristics of the hot Mg bed were obtained. The results showed that the column absorbs water vapour from air with efficiency up to 99.99%. Water in tested gases was between 3.4×10 3 to 4.2×10 3 μg·g -1 and the total water absorbed on the column was up to 162g, under this condition no water was detected in output gases. Using the hot magnesium bed more than 99.9% desorption water from the column was decomposed.