Abstract
CPR1000 severe accident management guideline (SAMG) is a product of the Westinghouse Owners Group (WOG) SAMG and the French SAMG (called GIAG) combination. It adopts the structure of WOG SAMG. However, it follows the approach of GIAG performing reactor coolant system (RCS) depressurization immediately after entering SAMG. This is a special feature of CPR1000 SAMG. The purpose of this paper is to evaluate this RCS depressurization strategy. The simulations of a station blackout (SBO) accident are performed for CPR1000 with RCS depressurization strategy adopted at both core exit temperature (CET) of 650 and 1100 °C together with opening different number of safety relief valves (SRV) using an integral severe accident analysis code. The optimized RCS depressurization strategy is provided to delay the reactor pressure vessel (RPV) failure time. And some comments are provided for future improvement.
Funding source: National Natural Science Funds of China
Award Identifier / Grant number: No. 72104207
Funding source: Natural Science Foundation of Fujian Province of China
Award Identifier / Grant number: No. 2020J01038
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: This work was supported by the National Natural Science Funds of China (No. 72104207) and the Natural Science Foundation of Fujian Province of China (No. 2020J01038).
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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