CORROSION ENVIRONMENT ASSESSMENT METHOD AND CORROSION MITIGATION METHOD IN RADIATION EXPOSURE FIELD

摘要

PPROBLEM TO BE SOLVED: To provide a corrosion environment assessment method in a radiation exposure field which enables more accurate assessments of corrosion potential there than ever, and to provide a corrosion mitigation method in the radiation exposure field which makes it possible to mitigate corrosion there more greatly than ever. PSOLUTION: The corrosion potential is found by means of: previously finding the relationship between amperage and radiation doses generated through the agency of a catalyst substance deposited on a structural material; speculating the yield of an anode current based on a radiation dose rate in an assessment position with the relationship between the amperage and the radiation dose rate; previously finding the relationship between radiation dose rates and the concentration of radiolysis products in a diffusion layer of high-temperature water in the vicinity of the structural material; and speculating the yield of a cathode current based on the radiation dose rate in the assessment position with the relationship between the radiation dose rates and the concentration of the radiolysis products. PCOPYRIGHT: (C)2010,JPO&INPIT