簡易型トリチウム貯蔵容器の開発

概要

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Tritium containers are commonly made of conventional types of stainless steel. Use of these materials, however, causes problems such as high permeation rate of tritium, contamination of tritium with protium, which is dissolved in stainless steel and so on. To solve these problems, the inner walls of such containers were passivated with anodic oxidation. As a first step to evaluate the effect of the passivation layers on the above problems, ad/absorption and desorption characteristics of deuterium were examined with thermal desorption spectroscopy. Such developed container showed smaller gas release and smaller amount of solved hydrogen compared commercial stainless steel containers. This property, however, arose from differences in materials themselves or in manufacturing processing of the containers. The oxide layers grown on a container with twice anodic oxidation processing did not act as barrier for the deuterium ad/absorption. The oxide layers grown by repeating the process four times, however, showed about one order of magnitude smaller ad/absorption, suggesting that these oxide layers will act as barrier for tritium ad/absorption and permeation.
富山大学の論文