核电厂立式自然循环蒸汽发生器数学模型的建立

Mathematical modeling of vertical natural circulation type steam generators in nuclear power plants

建立了压水堆核电站立式自然循环式蒸汽发生器的数学模型 ,包括一次侧、二次侧下降区段、二次侧沸腾区段、二次侧汽水分离区段等 4个控制体。可以模拟 :从一次侧到二次侧的传热 ;一次侧和二次侧的质量、能量动态特性 ;水位动态等。列出了描述蒸汽发生器模型的质量、能量守恒方程以及流量方程和传热方程。利用此模型可以模拟蒸汽发生器的动态性能 ,或与其它核电站模型一起构建核电站系统模型以供仿真分析研究或开发核电站仿真机之用。

The mathematical model of vertical natural circulation type steam generators (SG) in pressurized water reactor (PWR) nuclear power plants is presented. There are four control nodes in the model, including primary side, downcomer region, boiling region and water separator region on secondary side. The mass conservation equation, energy conservation equation, flow equation and heat transfer equation are described in this paper. The model is useful to simulate the dynamic characteristics of SG, or to build engineering simulator and training simulator with other nuclear power models.