AP1000核电站常规岛低加疏水泵配置及选型优化

Configuration and Type Selection Optimization of Low-Pressure Drain Pump for Conventional Island of AP1000 Nuclear Power Plants

核电机组常规岛低压加热器(简称低加)疏水泵不同的配置方案影响低加疏水系统的可靠性和经济性,为了优化系统性能,通过对现有国内规程和国内外不同堆型常规岛低加疏水泵配置方案的对比分析,结合AP1000常规岛低加疏水泵及相关系统的初投资,并考虑运行费用的影响,从经济性角度提出了低加疏水泵配置3台的合理性。在此基础上,根据低加疏水泵初步选型结果及低加疏水泵的特性曲线,通过经济分析,对低加疏水泵的选型流量和扬程进行了优化,提出了低加疏水泵流量按额定工况选择的建议,并对其扬程选择进行了优化,降低了低加疏水泵的运行费用。

Different configuration schemes of the low-pressure （LP） drain pump of conventional island （CI） in nuclear power plants affect the reliability and economy of the LP heater drain system.In order to optimize the system performance,by analyzing the existing domestic codes and comparing the LP drain pump configuration schemes for the reactors of different types in China and aboard,the rationality of three-pump configuration is proposed from the economic aspect in consideration of the initial investment of the LP drain pump and its associated system and the operation cost.According to the preliminary selection result and the characteristic curve of the LP drain pump,through economic analysis,the flow and head of the LP drain pump are optimized and it is proposed that the flow of the LP drain pump should be selected according to the rated load condition.The optimization of the head selection reduces the operation cost.