Probabilistic fracture mechanics (PFM) analysis code PASCAL has been developed by Japan Atomic Energy Agency for structural integrity assessments of reactor pressure vessels (RPVs) by considering the inherent probabilistic distributions of various influence factors. For practical applications, several evaluation models are improved, and have been implemented into the current PASCAL code. In this paper, the improvements of PASCAL are introduced firstly, such as the evaluation method for underclad cracks, treatments of the complicated welding residual stress distribution, and evaluation models for the warm pre-stressing effect. In addition, the effects of these improvements on failure probability or failure frequency of RPVs are investigated by performing PFM analyses for domestic RPVs using PASCAL. From the analysis results, the effects of the improved evaluation models are discussed.
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ASME 2017 Pressure Vessels and Piping Conference
July 16–20, 2017
Waikoloa, Hawaii, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5791-5
PROCEEDINGS PAPER
Probabilistic Fracture Mechanics Analysis Models for Japanese Reactor Pressure Vessels
Kai Lu,
Kai Lu
Japan Atomic Energy Agency, Tokai-mura, Japan
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Jinya Katsuyama,
Jinya Katsuyama
Japan Atomic Energy Agency, Tokai-mura, Japan
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Shumpei Uno,
Shumpei Uno
Japan Atomic Energy Agency, Tokai-mura, Japan
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Yinsheng Li
Yinsheng Li
Japan Atomic Energy Agency, Tokai-mura, Japan
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Kai Lu
Japan Atomic Energy Agency, Tokai-mura, Japan
Jinya Katsuyama
Japan Atomic Energy Agency, Tokai-mura, Japan
Shumpei Uno
Japan Atomic Energy Agency, Tokai-mura, Japan
Yinsheng Li
Japan Atomic Energy Agency, Tokai-mura, Japan
Paper No:
PVP2017-66003, V01BT01A006; 8 pages
Published Online:
October 26, 2017
Citation
Lu, K, Katsuyama, J, Uno, S, & Li, Y. "Probabilistic Fracture Mechanics Analysis Models for Japanese Reactor Pressure Vessels." Proceedings of the ASME 2017 Pressure Vessels and Piping Conference. Volume 1B: Codes and Standards. Waikoloa, Hawaii, USA. July 16–20, 2017. V01BT01A006. ASME. https://doi.org/10.1115/PVP2017-66003
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