文中把集总热容量法用于堆芯和一、二回路,导出了蒸汽发生器给水流量丧失时堆芯和一回路热工参数的动态响应方程及其解析解。该方程可用于核动力装置给水流量丧失时,运行现场的监督性快速计算与动态响应的分析与判断。 In this paper, the lumped heat capacity method is applied to the reactor core and the primary and secondary circuits. The dynamic response equation and its analytical solution of the thermal parameters of the core and the primary circuit are deduced when the feedwater flux of the steam generator is lost. This equation can be used to analyze and judge supervisory fast calculation and dynamic response of the nuclear power plant when the flow of feedwater is lost.