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Analysis of the “3 seconds power”of AP1000 reactor coolant pump
Published:2015-01-08
author: YAN Zhao-jun1, WU Jun1, SONG Guang-yao2
Browse: 3014
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Analysis of the “3 seconds power”of AP1000 reactor coolant pump
YAN Zhaojun1, WU Jun1, SONG Guangyao2
(1. China Power Complete Equipment Co.,Ltd., Beijing 100080, China;
2. Shandong Nuclear Power Co.,Ltd., Haiyang 265116, China)
Abstract: Aiming at how to retain 3 seconds power for the reactor coolant pump motor after the shutdown of steam turbine, because of cannedmotor pump being applicated as the reactor coolant pump in AP1000 nuclear power, with small inertia and short running down time, the characteristics were analyzed under extreme conditions, such as “island operation”, “ full power operation”, “full power operation +500kV power lose”, “full power operation and external power lose”, combined with the inherent characteristics of AP1000 nuclear power plant.The electrical system response and the reactor coolant system response were analyzed according to the simulation results of the powergrid stability and the reactor core DNBR.The research results indicate that the “3 seconds power” of reactor coolant pump after the shutdown of steam turbine can be satisfied to increase the forced circulation time of coolant and shut down safely.
Key words: AP1000 nuclear power; coolant pump; 3 seconds power; running down
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