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Report No.

Effect of $$gamma$$ ray irradiation on the corrosion of stainless steel in supercritical water

Nakahara, Yukio ; Karasawa, Hidetoshi*; Yamamoto, Masahiro ; Kiuchi, Kiyoshi; Katsumura, Yosuke*

A supercritical water-cooled nuclear reactor (SCWR) has been under review as one of advanced reactors. Corrosion tests of several types of stainless steel in supercritical water (25MPa, 400$$sim$$500$$^{circ}$$C) were executed under $$gamma$$ ray irradiation in order to clarify the effect of $$gamma$$ ray on the corrosion. The results of the tests shows that the corrosion of stainless steel was progressed by the growth and degradation of surface oxide film, the dependence of the parabolic rate law constant on temperature can be fit with Arrhenius' equation, $$gamma$$ ray irradiation changed the property of surface oxide film.



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