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STUDY ON A NEW ARRANGEMENT FOR THE AIR CLEANUP SYSTEM TO RECOVER TRITIUM

空气净化系统回收氚新方案的研究

基本信息

批准号：
08558055
负责人：
NISHIKAWA Masabumi
金额：
$ 3.14万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08558055/
关键词：
new arrangement air cleanup system adsorption bed catalyst bed with precious metal isotope exchange reaction 解媒塔固位体交感反応空気中トリチウム回収貴金属触媒塔

项目摘要

At present, the standard arrangement of the air cleanup system responsible for emergency tritium recovery from room air is a catalytic oxidation bed with a heater followed by an absorption bed with a cooler. One disadvantage of this arrangement is that trouble with the heater or the cooler could result in a loss of capacity to recover tritium. Another disadvantage of the catalyst-adsorption bed arrangement is that tritiated water must be recovered with a high decontamination factor after dilution with a large amount of water vapor in the working atmosphere.The performance of a new arrangement for the air cleanup system, which consists of a precious metal catalyst bed preceded by an adsorption bed without equipment , is proposed in this research project. According to calculations, most of the tritium released to the room air is recovered in the catalyst bed through oxidation, adsorption, and isotope exchange reaction when the new arrangement is applied. The adsorption bed placed before the catalyst bed dehumidifies the process gas to such a degree that the oxidation reaction of tritium in the catalyst bed is not hindered by water vapor in room.The new arrangement could recover tritium from the room air with the expected performance in the experiment using an small scale model reactor room.

目前，负责从室内空气中紧急回收氚的空气净化系统的标准布置是带有加热器的催化氧化床，然后是带有冷却器的吸收床。这种布置的一个缺点是，加热器或冷却器的故障可能导致回收氚的能力的损失。催化剂吸附床装置的另一个缺点是，氚化水必须回收后，大量的水蒸气在工作atmos.The空气净化系统，它包括一个贵金属催化剂床之前的吸附床没有设备的一种新的安排的性能，在本研究项目中提出了一个高的净化因子。根据计算，当应用新的布置时，释放到室内空气中的大部分氚通过氧化、吸附和同位素交换反应在催化剂床中被回收。吸附床置于催化剂床之前，对反应气体进行除湿，使氚在催化剂床中的氧化反应不受室内水蒸气的阻碍，在小型模拟反应器实验室中，新的吸附床可以从室内空气中回收氚，达到预期的效果。