The influence of inhomogeneous region on hydrogen permeation behavior in SUS304 stainless steel

2014 Fiscal Year Final Research Report

• Project/Area Number: 24561033
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: ISOBE kanetsugu 独立行政法人日本原子力研究開発機構, 核融合研究開発部門 六ヶ所核融合研究所, 研究主幹 (00354613)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 水素 / トリチウム / 透過挙動 / 溶接

Outline of Final Research Achievements

In this study, the influence of inhomogeneous region introduced by welding was investigated.Three types of SUS304 stainless tube that have different number of TIG welding parts were prepared to investigate the hydrogen permeation behavior. Hydrogen permeation experiments were carried out in 523, 573, 623 and 673K and Deuterium was used as permeation gas. In each temperature, Deuterium permeation flux in steady state is almost same in each sample and there is no obvious difference in transient behavior to steady state. These results suggested that inhomogeneous region occurred by TIG welding is not influenced on the hydrogen permeation behavior in this temperature range. From the above results, it was found that inhomogeneous region occurred by TIG welding is not influenced on the hydrogen permeation behavior in SUS304 stainless steel. And permeation behavior reported so far can be applied to the evaluation even though object apparatus and plants have many welding parts.

Free Research Field

トリチウム工学