Effect of -ray irradiation on corrosion of crevice portion of stainless steel in high temperature water

Yamamoto, Masahiro ; Nakahara, Yukio ; Kato, Chiaki   ; Tsukada, Takashi ; Wada, Yoichi*; Fuse, Motomasa*

Oxidants, such as hydrogen peroxide, are created by radiolysis of water in the light water reactor. It is easily estimated that the reactions are accelerated rather on the metal surface than the bulk water. Furthermore, a crevice portion concentrates more oxidants because of retardation of diffusion of them. Stainless steel samples having crevices were examined to clarify the effects of ray irradiation on corrosion at crevice portion. Difference of corrosion features were determined by some surface analytical techniques. And the effect of diffusion process of oxidants in the crevice was evaluated by calculation using FEM method.