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Licensed Unlicensed Requires Authentication Published by De Gruyter February 22, 2022

A study of RCS depressurization strategy of CPR1000 SAMG

Peizhao Yu, Jianxiang Zheng, Jun Li, Huifang Miao, Ling Wu and Danying Gu
From the journal Kerntechnik


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.

Corresponding author: Huifang Miao, College of Energy, Xiamen University, No. 4221-104 Xiangan South Road, Xiamen 361002, P. R. China; and Fujian Research Center for Nuclear Engineering, Xiamen City, Fujian Province, 361102, P. R. China, E-mail:

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

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. 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).

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.


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Received: 2021-11-17
Published Online: 2022-02-22
Published in Print: 2022-06-27

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