Primary Water Stress Corrosion Cracking of Nickel-Based Alloys

The primary water stress corrosion cracking (PWSCC) occurs in the nickel-based alloys of pressurized water reactor nuclear power plants (NPPs) in contact with the primary water environment. In order to improve the operation and management level of nuclear power plants, it is necessary to study the PWSCC problem and its management. This paper introduces the types of nickel-based alloys, the influencing factors and mechanisms for the PWSCC. Based on the international treatment methods and management requirements for PWSCC of nickel-based alloys components in NPPs, management suggestions are proposed for NPPs in China to deal with PWSCC of nickel-based alloys in the design and manufacturing stage and operation and maintenance stage.