压水堆核电厂三回路停泵水锤数值模拟

应用停泵水锤的基本理论．建立了压水堆核电厂三回路水泵、泵出口阀、冷凝器和出水虹吸井等边界条件的数学模型．并采用特征线法进行求解结合工程实例计算说明．泵出口阀的关闭程序对水锤压力的影响较大．水泵出口采用两阶段关闭液控蝶阀可以有效减小停泵水锤压力．但其关闭程序应在水锤数值模拟分析的基础上优化确定。

Numerical Simulation of Pump-Stopping Water Hammer in Tertiary Circulating Water System of PWR Nuclear Power Plant

Based on the basic theory of water hammer, the mathematical models of boundary condition of each component of tertiary circulating water system of PWR nuclear power plant, including pump unit, pump discharge valve, condenser and siphon outlet sump, were developed in this paper. Also, the solving method for the functions, namely characteristic-line method, was introduced. Combining with the calculation example, the author pointed out that the close schedule of pump discharge valve had notable influence on the water hammer pressure, while the butterfly valve closed in two stages could reduce the water hammer pressure effectively, but its optimized closing schedule should be determined based on the numerical simulation of fluid transient.