REACTOR STRUCTURE, PROCESS FOR PRODUCING THE SAME AND PROCESS FOR REPAIRING THE SAME

摘要

A reactor structure comprising a welded part of austenite based stainless steel members in which stress corrosion cracking is suppressed at the welded part exposed to high-temperature, high-pressure water. The austenite based stainless steel members employed as the reactor structure are welded using a specified welding metal and further heat treated such that the residual tensile stress at room temperature at least on the surface touching high-temperature water is not higher than 144 MPa or becomes compressive stress. Consequently, stress corrosion cracking can be suppressed at the welded part of a reactor structure exposed to high-temperature, high-pressure water.