Uncertainties are addressed in the special context of assessing and managing risks from rare, severe-consequence hazards. Risk Oriented Accident Analysis Methodology (ROAAM) is used to analyze uncertainties during severe accidents analysis in nuclear power plants. In-vessel Retention (IVR) is one of the mitigations for severe accidents which will cause core damage. By external reactor vessel cooling (ERVC), the integrity of the reactor vessel is preserved. The success criterion for IVR is the local heat flux on the wall of lower head is less than the critical heat flux (CHF). This paper analyzes the uncertain parameters which decide the mitigation to be successful or fail. Two bounding structures and 4 molten pool steady states are defined. And the success probability of IVR is evaluated with a molten pool heat transfer model. Then the effectiveness of IVR-ERVC under the two bounding structures is evaluated.
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18th International Conference on Nuclear Engineering
May 17–21, 2010
Xi’an, China
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-4931-6
PROCEEDINGS PAPER
Thermal Loading Failure Analysis of Molten Pool in the Reactor Vessel
Xiao Yang,
Xiao Yang
Shanghai Jiao Tong University, Shanghai, China
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Yanhua Yang,
Yanhua Yang
Shanghai Jiao Tong University, Shanghai, China
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Bo Kuang,
Bo Kuang
Shanghai Jiao Tong University, Shanghai, China
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Xiaoliang Fu
Xiaoliang Fu
Shanghai Jiao Tong University, Shanghai, China
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Xiao Yang
Shanghai Jiao Tong University, Shanghai, China
Yanhua Yang
Shanghai Jiao Tong University, Shanghai, China
Bo Kuang
Shanghai Jiao Tong University, Shanghai, China
Xiaoliang Fu
Shanghai Jiao Tong University, Shanghai, China
Paper No:
ICONE18-29819, pp. 577-581; 5 pages
Published Online:
April 8, 2011
Citation
Yang, X, Yang, Y, Kuang, B, & Fu, X. "Thermal Loading Failure Analysis of Molten Pool in the Reactor Vessel." Proceedings of the 18th International Conference on Nuclear Engineering. 18th International Conference on Nuclear Engineering: Volume 3. Xi’an, China. May 17–21, 2010. pp. 577-581. ASME. https://doi.org/10.1115/ICONE18-29819
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