OUTER FACE BUTTERING PROCESS OF WELDING JOINT

摘要

PROBLEM TO BE SOLVED: To prevent stress corrosion cracks of a welding joint and degradation of an ultrasonic wave flaw detecting characteristic against a weld part. SOLUTION: In this process, after water is poured inside a welding joint R of a nozzle 2 and a pipe 3 of a nuclear reactor pressure container, buttering B is applied to the outer face of the welding joint R by clad welding multiple layers while magnetic agitation is performed. Thereby, inside of the welding joint R is transferred to compressed stress so as to prevent stress corrosion cracks, and a structure is micronized by magnetic agitation so as to improve transmittance of ultrasonic waves. Thus, degradation of an ultrasonic wave flaw detecting characteristic against the welding joint R can be effectively prevented.