In-Vessel Retention (IVR) is one of appropriate severe accident mitigation strategies for AP1000 Nuclear Power Plant (NPP), and assurance of prevention against to thermal failure and structural failure of Reactor Pressure Vessels (RPV) is the prerequisite of IVR. A Finite Element Model fora RPV considering lower head melting was established, the creep calculation was carried out after the temperature field analysis, and the stress-strain responses for different times were obtained. By means of choosing representative evaluation sections and applying the Accumulative Damage Theory based on Larson-Miller Parameter, the Creep Damage calculations and evaluations were conducted. The results showed that the failure modes associated with creep rupture would not happen under IVR condition when a certain amount of internal pressure sustained. The approaches employed in this paper could be utilized in structural integrity evaluation of RPV under IVR for other new type NPPs.
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ASME 2018 Pressure Vessels and Piping Conference
July 15–20, 2018
Prague, Czech Republic
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5163-0
PROCEEDINGS PAPER
Creep Evaluation for a PWR Reactor Pressure Vessel Lower Head Under Severe Accident Conditions Considering Sustained Internal Pressure
YongJian Gao,
YongJian Gao
Shanghai Nuclear Engineering Research & Design Institute, Shanghai, China
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Ming Cao,
Ming Cao
Shanghai Nuclear Engineering Research & Design Institute, Shanghai, China
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YinBiao He
YinBiao He
Shanghai Nuclear Engineering Research & Design Institute, Shanghai, China
Search for other works by this author on:
YongJian Gao
Shanghai Nuclear Engineering Research & Design Institute, Shanghai, China
Ming Cao
Shanghai Nuclear Engineering Research & Design Institute, Shanghai, China
YinBiao He
Shanghai Nuclear Engineering Research & Design Institute, Shanghai, China
Paper No:
PVP2018-84375, V03BT03A052; 6 pages
Published Online:
October 26, 2018
Citation
Gao, Y, Cao, M, & He, Y. "Creep Evaluation for a PWR Reactor Pressure Vessel Lower Head Under Severe Accident Conditions Considering Sustained Internal Pressure." Proceedings of the ASME 2018 Pressure Vessels and Piping Conference. Volume 3B: Design and Analysis. Prague, Czech Republic. July 15–20, 2018. V03BT03A052. ASME. https://doi.org/10.1115/PVP2018-84375
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