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JWJ > Volume 27(4); 2009 > Article
Journal of KWJS 2009 August;27(4) :32-37.
Published online September 14, 2009.
Residual Stress Analysis for Repair Welding in Dissimilar Metal Weld
SeungGun Lee, TaeEun Jin, SungSik Kang, Dongil Kwon



Correspondence:   Published online September 14, 2009
ABSTRACT
  Alloy 600 and Alloy 82/182 materials have been used widely in PWR plants. But these materials are known to be susceptible to PWSCC(Primary Water Stress Corrosion Cracking). Recently, there have been several PWSCC events in major components due to repair welding, because repair welding in the dissimilar metal welds during the construction increases residual stress significantly on the inner surface of welds. In this paper, various residual stress analyses for repair welding were performed using FEM to check the effect of repair welding on residual stress distributions in PZR safety/relief nozzle. The results indicate that for inside surface repair welding, high tensile residual stress is developed on the inside surface of the nozzles.
Keywords: Dissimilar metal weld;PWSCC;Crack;Residual stress;Repair welding
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