Study of multi-column cold trap with highly effective recovery rate of tritium water vapor

高效氚水蒸气回收率的多柱冷阱研究

基本信息

批准号：
11558058
负责人：
FUKADA Satoshi
金额：
$ 2.62万
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：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11558058/
关键词：
tritium cold trap fusion reactor mist formation emergency clean-up system thermophoresis gas separation membrane inventory インベントリ

项目摘要

It is one of the most important issues to establish processes for tritium safety confinement and a fuel processing loop of a fusion reactor. In conventional processes for the emergency tritium confinement, catalytic oxidation and zeolite adsorption was the main process. Although the process can satisfy the safety rule for handling radioisotopes in Japanese facilities, the removal of tritium in interstitial sites of adsorbent was very difficult, and so it had a disadvantage of an increasae in tritium inventry. Therefore, it is necessary to improve the conventional catalytic oxidation and water adsorption process for the higher safety confinement of tritium gas and tritium compounds.The polyimede gas separation membrane can make gas volume processed decrease greatly and so make the process simple. In the present study we set up an experimental apparatus which can remove water vapor down to lower than the regulation level of tritium compounds in the environment without any use of adsorben … More t.In order to recover tritium water vapor down to the regulation level it was necessary to solve the problems of the tritium breakthrough of the cold trap and duct choking by deposition on the surfaces. In the first year of the present research, we found out that the tritium breakthrough was caused by mist generation under homogeneous nucleation. With the setup of a two-stages cooling system, we succeeded in operating it without mist formation, in quantitative estimation of frost formation rate on surfaces and so the time of choking, and finally in overall estimation of tritium removal rate. In the second year, we carried out experiments of the two stages tritium removal system comprising an open-column trap cooled by dry ice and glass-packed cold trap cooled by liquid nitrogen in series. The experimental results were presented in international journals such as Separation Science and Technology. We succeeded in the optimal design of the tritium removal system for an ITER-scale fusion reactor. Less

它是建立tri缩安全限制过程和融合反应器的燃料加工环的最重要问题之一。在紧急tri骨约束的常规过程中，催化氧化和沸石吸附是主要过程。尽管该过程可以满足处理日本设施中放射性同位素的安全规则，但是在吸附剂的间隙地点删除tri虫是非常困难的，因此它在Tritium Inventry中造成了增加的灾难。因此，有必要改善传统的催化氧化和水添加剂过程，以更高的安全性限制tiri毛气体和tri虫化合物。Polyimede气体分离膜可以使气体体积降低，从而使过程变得很大，从而使过程变得简单。在本研究中，我们建立了一个实验性设备，可以将水蒸气降至低于环境中的trium化合物的调节水平，而无需使用Adsorben…更多的t.in t.in t.in将tritium Water Vapor恢复到调节水平，以解决冷陷阱突破的问题是必要的。在本研究的第一年中，我们发现tri症突破是由均匀核下的不幸引起的。通过建立了两个阶段冷却系统，我们成功地进行了操作而没有误导，并定量地估计了表面上的霜冻形成速率，因此窒息时间，最后是对tri骨去除率的总体估计。在第二年，我们进行了两个阶段trimeval系统的实验，该实验完成了一个由干冰和玻璃包装的冷陷阱冷却的开柱陷阱，该陷阱由液氮串联冷却。实验结果在国际期刊（例如分离科学与技术）中提出。我们成功地完成了iTer级融合反应器的trimemaval系统的最佳设计。较少的