Effect of Natural Circulation on RCS Depressurization Strategy in PWR NPP

ZHANG Kun; TONG Li-li; CAO Xue-wu

Volume 30 Issue 2

Apr. 2009

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ZHANG Kun, TONG Li-li, CAO Xue-wu. Effect of Natural Circulation on RCS Depressurization Strategy in PWR NPP[J]. Nuclear Power Engineering, 2009, 30(2): 70-74.

Citation:

ZHANG Kun, TONG Li-li, CAO Xue-wu. Effect of Natural Circulation on RCS Depressurization Strategy in PWR NPP[J]. Nuclear Power Engineering, 2009, 30(2): 70-74.

ZHANG Kun, TONG Li-li, CAO Xue-wu. Effect of Natural Circulation on RCS Depressurization Strategy in PWR NPP[J]. Nuclear Power Engineering, 2009, 30(2): 70-74.

Citation:

ZHANG Kun, TONG Li-li, CAO Xue-wu. Effect of Natural Circulation on RCS Depressurization Strategy in PWR NPP[J]. Nuclear Power Engineering, 2009, 30(2): 70-74.

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Effect of Natural Circulation on RCS Depressurization Strategy in PWR NPP

School of Nuclear Science and Engineering, Shanghai Jiaotong University, Shanghai, 200240

Received Date: 2008-01-22
Rev Recd Date: 2008-07-18

Available Online: 2025-07-28

Publish Date: 2009-04-15

Abstract

Abstract

The natural circulation model of Chinese Qinshan Nuclear Power Plant（NPP）Unit 2 is built using SCDAP/RELAP5 code.Selecting TMLB’ accident as the base sequence,this paper analyzes the natural circulation phenomena in high-pressure core melt severe accident.In order to study the effect of natural cir-culation on RCS depressurization strategy,the accident progressions of RCS depressurization with and with-out natural circulation are simulated,respectively.According to the results,the natural circulation can delay the initiation of RCS depressurization and the whole accident progression,but it does not evidently influence the results of RCS depressurization.
- Natural circulation,
- TMLB’ accident,
- Reactor Coolant System（RCS）depressurization strategy,
- SCDAP/RELAP5 code