In this study, stress analyses and structural integrity evaluations for an interference-fit flywheel assembly of reactor coolant pump are conducted. Finite element stress solutions of the flywheel assembly at the standstill, normal operation speed, design overspeed and joint-release speeds, are obtained. For evaluations of structural integrity of the flywheel with surface cracks, considering ductile and non-ductile fracture, stress intensity factors of a series of surface or edge cracks postulated are also obtained by using the finite element alternating method. In the analyses, release of deformation-controlled stresses caused by structural interactions with centrifugal loads during rotation is considered. Results of stress and fracture evaluations are presented, including the primary and secondary stresses, applied stress intensity factors and the fatigue crack growth rates in the flywheel disc. For the interference-fit flywheel design and material conditions investigated, it is found that fatigue crack growth rates of smaller surface cracks in the flywheel are negligible. The material resistance to non-ductile fracture in terms of material KIC and RTNDT is the governing factor for the structural integrity of the flywheel with larger surface cracks.
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ASME/JSME 2004 Pressure Vessels and Piping Conference
July 25–29, 2004
San Diego, California, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4683-0
PROCEEDINGS PAPER
A Structural Integrity Evaluation for the Interference-Fit Flywheel of Reactor Coolant Pump Available to Purchase
J.-S. Park,
J.-S. Park
Korea Power Engineering Company, Inc., Daejeon, Republic of Korea
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H.-C. Song,
H.-C. Song
Korea Power Engineering Company, Inc., Daejeon, Republic of Korea
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K.-S. Yoon,
K.-S. Yoon
Korea Power Engineering Company, Inc., Daejeon, Republic of Korea
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T.-S. Choi,
T.-S. Choi
Korea Power Engineering Company, Inc., Daejeon, Republic of Korea
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J.-H. Park
J.-H. Park
Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
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J.-S. Park
Korea Power Engineering Company, Inc., Daejeon, Republic of Korea
H.-C. Song
Korea Power Engineering Company, Inc., Daejeon, Republic of Korea
K.-S. Yoon
Korea Power Engineering Company, Inc., Daejeon, Republic of Korea
T.-S. Choi
Korea Power Engineering Company, Inc., Daejeon, Republic of Korea
J.-H. Park
Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
Paper No:
PVP2004-3007, pp. 73-80; 8 pages
Published Online:
August 12, 2008
Citation
Park, J, Song, H, Yoon, K, Choi, T, & Park, J. "A Structural Integrity Evaluation for the Interference-Fit Flywheel of Reactor Coolant Pump." Proceedings of the ASME/JSME 2004 Pressure Vessels and Piping Conference. Risk and Reliability and Evaluation of Components and Machinery. San Diego, California, USA. July 25–29, 2004. pp. 73-80. ASME. https://doi.org/10.1115/PVP2004-3007
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