Reducing Hydrogen Penetration through Corrosion Layer Formed on Zirconium Alloys by Iron Addition
Author:
Kakiuchi Kazuo1, Okubo Kazutoshi1, Itagaki Noboru1, Miyazaki Akihiro2, Ishii Yoshiaki2, Suzuki Shunichi2, Terai Takayuki3, Yamawaki Michio4
Affiliation:
1. Nuclear Fuel Industries, Ltd. 2. Tokyo Electric Power Company 3. The University of Tokyo 4. Tokai University
Abstract
Latest post-irradiation experiment results of Zry-2 and HiFi alloy (0.4%Fe-Zry2) showed that iron
addition reduces the hydrogen pickup by these alloys compared to oxidation amount. In order to clarify
the mechanism of reduced hydrogen absorption rate, (1) autoclave test, (2) surface potential
measurement and (3) hydrogen absorption test of the intermetallic compound were carried out.
Based on these results, a tentative mechanism for hydrogen absorption by zirconium alloys is proposed,
taking into account of both the electrical potential gradient over the oxide film as well as the SPP
window for hydrogen absorption.
Publisher
Trans Tech Publications Ltd
Reference7 articles.
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