Innovative prevention of stress corrosion crack propagation in nuclear power pipe welds

Abstract Failure caused by stress corrosion cracking (SCC) is inevitable during the long-term service of nuclear power pipe welds. This mainly due to propagation microcracks in deposited metal, which seriously affects operation safety pressure pipes. Overlay welding practical for repair welding, can introduce compressive residual inside weld seam. In this work, a diagonal T-pipe joint was fabricated using tungsten inert gas arc with ERRS-3 wire, and an overlay also wire under circumstances water no pipe. And then contour method finite element were employed measure calculate distribution joint. Both results showed that stresses into The zone area seam larger than without pipe, varies at different positions work expected promote application technology T-shaped prevent crack