核电站失去厂外交流电源后二回路重要系统的状态控制研究

Study on the state control of important system in secondary circuit of nuclear power station after loss of off-site AC power supply

失去厂外交流电源属于核电机组设计中的预期运行事件,在进行事故处理时,明确操纵员的关注点将对机组向安全稳定状态过渡起到积极作用。本文以田湾核电站二期工程为例,针对该事故工况下二回路相关的蒸汽发生器供水及汽轮发电机安全停运等重要关注点进行研究,通过分析系统在自动动作和操纵员手动干预过程中可能出现的问题,给出解决办法,以提高瞬态工况下的人员响应能力,保证系统设备安全。

The loss of off-site AC power supply is an expected operation event in the design of nuclear power units.It plays a positive role in the transition of the unit to a safe and stable state when the operator’s concerns are clearly defined during the accident handling.Taking Tianwan nuclear power station phase II project as an example,this paper discusses and studies the important concerns related to the steam generator water supply and the safety outage of the turbine generator in the secondary circuit under accident condition.Through the analysis on possible problems of the system during the process of automatic action and operator manual intervention,solution are put forward to improve personnel response ability under transient conditions and ensure the safety of the system equipment.