플랜트 승압펌프 재순환 배관 용접부의 용접비드에 의해 발생한 감육결함 분석 및 건전성 평가

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 24; no. 4; pp. 38 - 46
• Main Authors: 남기우(Ki-Woo Nam), 안석환(Seok-Hwan Ahn), 도재윤(Jae-Yoon Do)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2010
• Subjects: 해양공학; Boost pump recirculation pipe 승압펌프 재순환 배관; Integrity evaluation 건전성 평가; Flow analysis 유동해석; Erosion/Corrosion 침식/부식; Weld bead 용접지드; Wall thinning defect 감육결함; /
• ISSN: 1225-0767; 2287-6715

The wall thinning phenomenon of pipes was simulated as metal loss due to erosion and corrosion. Such wall thinning defects in the pipes of power plants are a very important safety consideration. In this study, we analyzed wall thinning defects that occurred by weld bead of weld zone of boost pump recirculation pipe. From the results of the analysis of pipe failures, numerical analysis was performed by Fluent v6.3.26 using the standard k-$\varepsilon$ model of the weld bead shape, such as an elliptical or a spherical shape, on the inner wall of the pipe. Using the results obtained, we showed the overlap effect by cavitations corrosion and erosion-corrosion at the bottom of the wall-thinning defect.