플랜트 승압펌프 재순환 배관 용접부의 용접비드에 의해 발생한 감육결함 분석 및 건전성 평가
Analysis of Weld Beads for Wall Thinning Defects in the Weld Zone of the Boost Pump Recirculation Pipe for Power Plants and Evaluation of Their Integrity
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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 v6.3.26using the standard k-ε 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.
Abstract
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 v6.3.26using the standard k-ε 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.
참고문헌 (11)
- 강승현, "레이저 유도 초음파 기법을 이용한 배관의 감육손상 평가", 석사, pp.2005
- 김 진 원, "직관 배관의 국부 감육결함에 대한 건전성 평가 모델", 대한기계학회논문집 A, 29(5), pp.734~742 (2005), 대한기계학회
- 안석환, "굽힘하중을 받는 배관의 파손에 미치는 감육의 영향", 대한기계학회논문집 A, 29(4), pp.606~613 (2005), 대한기계학회
- 안석환, "침식-부식에 의해 감육된 배관의 파손거동에 미치는 감육위치의 영향", 한국해양공학회지, 21(1), pp.51~58 (2007), 한국해양공학회
- 한겨레신문, "일 원전사고 노후화․부실관리 탓", ASTM standard., ~ (2004)
- Ahn, S.H, "Plastic Collapse Behavior of Pipe with Local Wall Thinning Subjected to Bending Load Allowable Limit", JHPI, 36(4), pp.225~234 (1998)
- CNN. com, "Japan to Probe Nuclear Accident", ~ (2004)
- Deardorff, A.F, "Development of ASME Section Criteria for Erosion-Corrosion Thinning of Carbon Steel Piping", ASME PVP, PVP-Vol-18, NDE-Vol 7, 71~75 (1990)
- Mathonet, J.F., "Belgian Methodology for Enaluation of Erosion Corrosion Phenomena in Unit 1; 2; 3; 4 of the DOEL Nuclear Power Plant (NPP)", ASME PVP, PVP-Vol-303, 393~399 (1995)
- Miyazaki, K, "Fracture Behavior of Carbon Steel Pipe with Local Wall Thinning Subjected to Bending Load", Nuclear Engineering and Design, 191, pp.195~204 (1999)
- Surry Unit 2 Reactor Trip and Feedwater Pipe Failure Report, "Virginia Electric and Power Co", Virginia Electric and Power Co., ~ (1987)