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고리 원전 가압기 PWOL의 용접 방향이 이종금속용접부 잔류응력 분포에 미치는 영향
배홍열(H-Y Bae),송태광(T-K Song),전윤배(Y-B Chun),오창영(C-Y Oh),김윤재(Y-J Kim),이경수(K-S Lee),박치용(C-Y Park) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
Weld overlay is one of the residual stress mitigation method which arrest crack. An overlay weld sued in this manner is termed a preemptive weld overlay(PWOL). PWOL was good for distribution of residual stress of dissimilar metal weld(DMW) by previous research. Because range of overlay welding is wide relatively, residual stress distribution on PWR is affected by welding sequence. In order to examine the effect of welding sequence, PWOL was applied to a specific DMW of KORI nuclear power plant by finite element analysis method. As a result, the welding direction that from nozzle to pipe is better good for residual stress distribution on PWR.