压水堆核电机组饱和蒸汽管道疏水量计算模型

Drain Flowrate Calculation for Saturated Steam Line in the PWR Nuclear Power Plant

蒸汽输送管道疏水系统对核电机组运行的经济性和安全性起着至关重要的作用,本文针对大型压水堆核电机组饱和蒸汽管道,建立饱和蒸汽输送管道疏水量计算的数学模型,以国内某引进型大型压水堆核电机组为例,计算出主要蒸汽管道的启动疏水量和经常疏水量,结果表明核电机组蒸汽输送管道经常疏水量不可忽略,须同时针对启动疏水和经常疏水拟定疏水系统。

The steam line drain system plays an important role in the economy and safety of the nuclear power unit.In view of the saturated steam line of the nuclear power plant,this paper sets up a mathematical model to calculate the saturated steam line drain flowrate,then an imported PWR nuclear power unit is taken as an example to calculate the startup and regular drain flowrate by using the model.The calculation result indicates that the regular drain flowrate of the saturated steam line cannot be ignored and the drain system should be designed based on start-up drain and normal drain.