The 40% of wall criterion, which is generally used for the plugging of steam generator tubes, is applied only to a single crack. In the previous study (Moon et al. (2002)), a total number of 9 failure models were introduced to estimate the local failure of the ligament between cracks and the optimum coalescence model of multiple collinear cracks was determined among these models. It is, however, known that parallel axial cracks are more frequently detected during an in-service inspection than collinear axial cracks. The objective of this study is to determine the plastic collapse model which can be applied to the steam generator tube containing two parallel axial through-wall cracks. Three previously proposed local failure models were selected as the candidates. Subsequently interaction effects between two adjacent cracks were evaluated to screen them. Plastic collapse tests for the plate with two parallel through-wall cracks and finite element analyses were performed for the determination of the optimum plastic collapse model. By comparing the test results with the prediction results obtained from the candidate models, a crack opening displacement (COD) base model was selected as an optimum model.
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Optimum Global Failure Prediction Model of Steam Generator Tube With Two Parallel Axial Through-Wall Cracks
Seong-In Moon,
Seong-In Moon
SAFE Research Center, School of Mechanical Engineering, Sungkyunkwan University, 300 Chunchun-dong, Jangan-gu, Suwon, Kyonggi-do 440-746, Korea
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Young-Jin Kim,
Young-Jin Kim
SAFE Research Center, School of Mechanical Engineering, Sungkyunkwan University, 300 Chunchun-dong, Jangan-gu, Suwon, Kyonggi-do 440-746, Korea
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Jin-Ho Lee,
Jin-Ho Lee
Korea Institute of Nuclear Safety, Yuseong, Daejeon 305-338, Korea
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Myung-Ho Song,
Myung-Ho Song
Korea Institute of Nuclear Safety, Yuseong, Daejeon 305-338, Korea
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Youn-Won Park
Youn-Won Park
Korea Institute of Nuclear Safety, Yuseong, Daejeon 305-338, Korea
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Seong-In Moon
SAFE Research Center, School of Mechanical Engineering, Sungkyunkwan University, 300 Chunchun-dong, Jangan-gu, Suwon, Kyonggi-do 440-746, Korea
Young-Jin Kim
SAFE Research Center, School of Mechanical Engineering, Sungkyunkwan University, 300 Chunchun-dong, Jangan-gu, Suwon, Kyonggi-do 440-746, Korea
Jin-Ho Lee
Korea Institute of Nuclear Safety, Yuseong, Daejeon 305-338, Korea
Myung-Ho Song
Korea Institute of Nuclear Safety, Yuseong, Daejeon 305-338, Korea
Youn-Won Park
Korea Institute of Nuclear Safety, Yuseong, Daejeon 305-338, Korea
Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division September 15, 2003; revision received September 22, 2004. Review conducted by: K. K. Yoon.
J. Pressure Vessel Technol. May 2005, 127(2): 123-128 (6 pages)
Published Online: May 27, 2005
Article history
Received:
September 15, 2003
Revised:
September 22, 2004
Online:
May 27, 2005
Citation
Moon , S., Kim, Y., Lee , J., Song , M., and Park, Y. (May 27, 2005). "Optimum Global Failure Prediction Model of Steam Generator Tube With Two Parallel Axial Through-Wall Cracks ." ASME. J. Pressure Vessel Technol. May 2005; 127(2): 123–128. https://doi.org/10.1115/1.1858921
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