Both deterministic and probabilistic methods are used to analyze the integrity of a reactor pressure vessel (RPV) subjected to pressurized thermal shocks (PTSs). The FAVOR code is applied to calculate the probabilities for crack initiation and failure of the RPV subjected to two transients, by considering crack distributions based on cracks observed in the Shoreham and pressure vessel research user facility (PVRUF) RPVs. The crack parameters, i.e. crack density, depth, aspect ratio, orientation and location are assumed as random variables following different distributions. KI of the cracks with the same depth increases with its aspect ratio. Both KI and KIC at the crack tip increase with crack depth, which is the reason why a deeper crack does not necessarily lead to a higher failure probability. The underclad crack is the most critical crack and the deeper crack is the least critical one in this study. Considering uncertainties of the transients results in higher failure probabilities.
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ASME 2014 Pressure Vessels and Piping Conference
July 20–24, 2014
Anaheim, California, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-4606-3
PROCEEDINGS PAPER
Probabilistic Pressurized Thermal Shocks Analysis for a Reactor Pressure Vessel Available to Purchase
Guian Qian,
Guian Qian
Paul Scherrer Institute, Villigen PSI, Switzerland
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Markus Niffenegger
Markus Niffenegger
Paul Scherrer Institute, Villigen PSI, Switzerland
Search for other works by this author on:
Guian Qian
Paul Scherrer Institute, Villigen PSI, Switzerland
Markus Niffenegger
Paul Scherrer Institute, Villigen PSI, Switzerland
Paper No:
PVP2014-28765, V007T07A014; 8 pages
Published Online:
November 18, 2014
Citation
Qian, G, & Niffenegger, M. "Probabilistic Pressurized Thermal Shocks Analysis for a Reactor Pressure Vessel." Proceedings of the ASME 2014 Pressure Vessels and Piping Conference. Volume 7: Operations, Applications and Components. Anaheim, California, USA. July 20–24, 2014. V007T07A014. ASME. https://doi.org/10.1115/PVP2014-28765
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