压水堆核电厂再热汽温及影响因素分析

Analysis of Reheated Steam Temperature with Its Influencing Factors for PWR Nuclear Power Plant

根据基本的质量和能量平衡关系,运用机理分析方法建立了核电机组的传热简化模型,通过严密的数学推导,得到了核电机组再热汽温与其影响因素的微分关系式,该关系式全面反映了影响再热汽温变化的各种因素,根据该式可分析再热汽温变化特性。最后,对某1 000 MW核电机组进行了热力计算,比较了各因素对再热汽温变化的影响。研究结论可为核电机组的运行控制和仿真提供理论指导。

From the relationship of quality balance and energy balance, a simplified heat exchange model of nuclear power plant is suggested with mechanism analytical method. A differential equation for the reheated steam temperature and its influencing factors which may lead to the variation of the reheated steam temperature is established based on this model through refined mathematical deduction. All factors which may affect the change of the rehea- ted steam temperature are included in this differential equation, the fluctuating characteristic of reheated steam tem- perature can be analyzed clearly in this differential equation. According to the thermodynamic calculation results for 1 000 MW nuclear power plant, the effects of every influencing factor to the reheated steam temperature are ana- lyzed quantitatively. The study and conclusion of this paper can provide a theoretical guidance for the control and simulation of nuclear power plant.