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http://dx.doi.org/10.3795/KSME-A.2013.37.5.649

Stress Distribution in the Dissimilar Metal Butt Weld of Nuclear Reactor Piping due to the Simulation Technique for the Repair Welding  

Lee, Hwee-Seung (Dept. of Mechanical System Design Engineering, Seoul Nat'l Univ. of Science and Technology)
Huh, Nam-Su (Dept. of Mechanical System Design Engineering, Seoul Nat'l Univ. of Science and Technology)
Kim, Jin-Su (Korea Institute of Nuclear Safety)
Lee, Jin-Ho (Korea Institute of Nuclear Safety)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.37, no.5, 2013 , pp. 649-655 More about this Journal
Abstract
During welding, the dissimilar metal butt welds of nuclear piping are typically subjected to repair welding in order to eliminate defects that are found during post-weld inspection. It has been found that the repair weld can significantly increase the tensile residual stress in the weldment, and therefore, accurate estimation of the weld residual stress due to repair weld, especially for dissimilar metal welds using Ni-based alloy 82/182 in nuclear components, is of great importance in order to assess susceptibility to primary water stress corrosion cracking. In the present study, the stress distributions of dissimilar metal butt welds in nuclear reactor piping subjected to repair weld were investigated based on detailed nonlinear finite element analyses. Particular emphasis was placed on the variation of the stress distribution in the dissimilar metal butt weld according to the finite element welding analysis sequence for the repair welding process.
Keywords
Dissimilar Metal Butt Weld; Finite Element Analysis; PWSCC; Repair Welding; Welding Residual Stress;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
연도 인용수 순위
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