关键词: AP1000核电站, 给水泵跳闸, 蒸汽发生器（ＳＧ）水位, 瞬态分析

Abstract: The AP1000 nuclear power plant adopts three electric pumps of 33.3% capacity with no standby pumps to provide feedwater during rated power operating. Through the stable feedwater and steam flows equilibrium calculation under 100% and 70% rated power conditions, it is verified that in case of one pump trip, the remaining two pumps can maintain power plant operation at 70% rated power. Based on the analysis on the simulation results of single feedwater pump trip transient condition established in CENTS program it is verified that there are no needs for rapid power reduction under this transient condition. The reactor power automatic control and the steam bypass systems can manage to maintain the average temperature of the primary loop within the allowable range while the steam generator water level does not drop to the low-low water level which would cause reactor shutdown. These results are critical to AP1000 nuclear power plant commissioning and operation.

Key words: AP1000 nuclear power plant, feedwater pump trip, steam generator (SG) water level, transient analysis