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http://dx.doi.org/10.3795/KSME-A.2012.36.2.137

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

Kim, Ji-Soo (Dept. of Mechanical Engineering, Korea Univ.)
Kim, Ju-Hee (Dept. of Mechanical Engineering, Korea Univ.)
Bae, Hong-Yeol (Dept. of Mechanical Engineering, Korea Univ.)
Oh, Chang-Young (Dept. of Mechanical Engineering, Korea Univ.)
Kim, Yun-Jae (Dept. of Mechanical Engineering, Korea Univ.)
Lee, Kyung-Soo (Korea Electric Power Research Institute)
Song, Tae-Kwang (Korea Institute of Nuclear Safety)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.36, no.2, 2012 , pp. 137-148 More about this Journal
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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