Corrosion Behavior of Stainless Steel in High-temperature, High-pressure Water under Radiation Environment

Abstract

The primary cooling system of a boiling water reactor is a special corrosive environment where hydrogen peroxide, an oxidizing agent, exists due to radiolysis of high temperature, high pressure, and high purity cooling water. In order to understand the corrosion phenomena in such a special environment, we have conducted a combined analysis of electrochemical impedance method in high temperature and high pressure pure water and the finite element method, and successfully obtained the electrical conductivity and diffusion coefficient of hydrogen peroxide, which are important corrosion factors.

Keywords

High Temperature Pure Water, Electrochemical Impedance Method, Hydrogen Peroxide, Stainless Steel, Corrosion, Diffusion Coefficient, Conductivity

Publications

• T.Sato, M.Yamamoto, T.Tsukada, C.Kato, In-situ Measurement of Corrosion Environment in High Temperature Water without Electrolyte Utilizing Electrochemical Impedance Spectroscopy, Zairyo-to-Kankyo, 64(3), pp 91-97 (2015). (in Japanese)