Corrosion analysis of the butterfly valve in auxiliary cooling water system of nuclear power plant

摘要

This paper describes the serious corrosion of valve plate in the auxiliary cooling water system,which found in the first refueling overhaul of the nuclear power plant.Through the analysis of corrosion defects on the surface,the material of butterfly plate,and the current detection of macro galvanic corrosion,to find out the cause of corrosion on butterfly plate and proposed suggestions for improvement.