CPR1000型核电厂汽轮机旁路系统甩负荷控制器的性能研究

Research on the Load Rejection Controller Performance of Turbine Bypass System in CPR1000 Nuclear Power Plant

摘要: CPR1000型核电厂汽轮机旁路排放系统(GCTc)在高功率下使用温度控制模式(T模式)，使机组能够适应汽轮机负荷快速且大幅的变化，而不引起反应堆紧急停堆。但由于堆芯中子学参数的变化，通常在寿期末，机组应对汽轮机大幅甩负荷工况的能力会相对降低。本文基于GCTc的T模式通过新增甩负荷控制器，以提高应对甩负荷工况的性能，并利用系统分析程序GINKGO对其控制性能进行了数值模拟与分析。研究结果表明：新增甩负荷控制器后，GCTc控制性能得到了优化，有利于提高CPR1000型核电厂应对甩负荷工况的能力，降低触发紧急停堆风险。

Abstract: The GCTc in CPR1000 nuclear power plant uses temperature control mode (mode T) under high power, which enables nuclear power plant to adapt to rapid and large change of steam turbine load (load rejection condition). However, due to the change of neutronics parameters in the core, usually the capacity of the unit to deal with load rejection at the end of life period decreases. In this paper, a new load rejection control unit is added to improve the capability of load rejection, and its control capability is numerically simulated and analyzed by using the system analysis program GINKGO. The research result shows that the control capability is optimized after adding load rejection control unit, which is beneficial to improve the capacity of CPR1000 nuclear power plant against load rejection and reduce the risk of reactor trip.