压水堆机组二回路热力系统实时仿真研究

A STUDY ON A REAL-TIME SIMULATION FOR THE SECOND LOOP OF PWR NUCLEAR POWER UNIT

介绍了核电机组二回路主蒸汽与给水回热系统实时仿真。模型基于能量、质量、动量守恒方程和水蒸汽物性,考虑了蒸汽的可压缩性和表面式换热器的非平衡的动态热交换特性,以及PWR型机组主蒸汽参数低、容积流量大的特点,利用流体网络进行求解。仿真结果表明该模型具有准确的计算结果,动态趋势合理,适用于全工况范围正常运行和异常事故运行,为新一代仿真机的研制,提供了有效途径。

A real time model of simulation of secondary system for PWR nuclear power unit is presented. It is based on the energy balance equation, the conservation of mass andmomentum equations and mixture steam property. The effects of compressible steam flows, non-equilibrium two-phase heat exchange and the characteristic of initial steam parameters and volume flow rate for PWR unit are considered, and parameters are dynamically calculated by fluid flow network package.Simulation result shows that the model gets high accuracyand reasonable transient behavior of the secon-dary system and can be used for full scope, normal operating conditions and abnormal accident events in real-time simula-tion for PWRnuclear power unit. It provides a new way to develop the next generation full scope simulators.