Recently, it is reported that axial and circumferential PWSCCs (primary water stress corrosion crackings) occurred on the dissimilar welds of steam generator drain nozzles in PWR. In this study, the PWSCC is assessed via residual stress analysis, PWSCC initiation review and growth assessment. The residual and operating stress distributions are calculated by finite element method. Based on the stress analysis results, PWSCC initiation locations are predicted by comparing between the stresses and PWSCC threshold stress value. The predicted locations are compared with the examination results by using penetration, eddy current and destructive tests. It is found that the PWSCC initiation prediction has good agreement with the examination results. Also, PWSCC growth is assessed by using the PWSCC growth analysis procedure presented in ASME B&PV Code, Sec.XI. Finally, it is identified that the penetration time via growth assessment has reasonable agreement with the real one.
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ASME 2009 Pressure Vessels and Piping Conference
July 26–30, 2009
Prague, Czech Republic
Conference Sponsors:
- Pressure Vessels and Piping
ISBN:
978-0-7918-4369-7
PROCEEDINGS PAPER
PWSCC Assessment of Dissimilar Weld on Steam Generator Drain Nozzle in PWR
Jong-Sung Kim,
Jong-Sung Kim
Sunchon National University, Suncheon, Republic of Korea
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Seong-Sik Hwang,
Seong-Sik Hwang
Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
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Hong-Pyo Kim
Hong-Pyo Kim
Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
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Jong-Sung Kim
Sunchon National University, Suncheon, Republic of Korea
Seong-Sik Hwang
Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
Hong-Pyo Kim
Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
Paper No:
PVP2009-77715, pp. 523-527; 5 pages
Published Online:
July 9, 2010
Citation
Kim, J, Hwang, S, & Kim, H. "PWSCC Assessment of Dissimilar Weld on Steam Generator Drain Nozzle in PWR." Proceedings of the ASME 2009 Pressure Vessels and Piping Conference. Volume 6: Materials and Fabrication, Parts A and B. Prague, Czech Republic. July 26–30, 2009. pp. 523-527. ASME. https://doi.org/10.1115/PVP2009-77715
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