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Welding Residual Stress Distributions for Dissimilar Metal Nozzle Butt Welds in Pressurized Water Reactors

가압경수로 노즐 맞대기 이종금속용접부의 용접잔류응력 예측

  • Received : 2010.12.13
  • Accepted : 2011.12.14
  • Published : 2012.02.01

Abstract

In pressurized water nuclear reactors, dissimilar metal welds are susceptible to primary water stress corrosion cracking. To access this problem, accurate estimation of welding residual stresses is important. This paper provides general welding residual stress profiles in dissimilar metal nozzle butt welds using finite element analysis. By introducing a simplified shape for dissimilar metal nozzle butt welds, changes in the welding residual stress distribution can be seen using a geometry variable. Based on the results, a welding residual stress profile for dissimilar metal nozzle butt welds is proposed that modifies the existing welding residual stress profile for austenitic pipe butt welds.

Keywords

Dissimilar Metal Weld(DMW);Primary Water Reactors(PWR);Welding Residual Stress Distribution;Finite Element Method(FEM);Primary Water Stress Corrosion Crack(PWSCC)

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Cited by

  1. Stress Distribution in the Dissimilar Metal Butt Weld of Nuclear Reactor Piping due to the Simulation Technique for the Repair Welding vol.37, pp.5, 2013, https://doi.org/10.3795/KSME-A.2013.37.5.649
  2. Investigation into Variations of Welding Residual Stresses and Redistribution Behaviors for Different Repair Welding Widths vol.38, pp.2, 2014, https://doi.org/10.3795/KSME-A.2014.38.2.177