RRA模式下热阱完全丧失的事故处理策略优化研究

Study on the Optimization of Accident Handling Strategy for the Complete Loss of Heat Sink in the RRA Mode

为了解决RRA模式下(余热排出系统冷却正常停堆模式)热阱完全丧失的事故处理策略失效的问题,本文通过研究设备冷却水系统热负荷和事故处理进程,找出导致事故处理策略失效的原因,并提出相应的优化方案。经过测算,采用优化后的事故处理策略,能有效延缓设备冷却水系统温度上升速率,顺利将机组过渡到后备模式。本文提出的事故处理策略优化方案可用于压水堆核电机组的事故规程优化,提升核电机组应对热阱完全丧失事故的处理能力。

In order to solve the problem of the accident handling strategy failure for the complete loss of heat sink in the RRA mode,this paper finds out the reasons for the accident handling strategy failure,through study on the heat load of the RRI system and the process of accident treatment,and puts forward the corresponding optimization scheme.After calculation,the optimized accident handling strategy can effectively delay the temperature rise rate of the RRI system and smoothly transfer the unit to the backup mode.The accident handling strategy optimization scheme proposed in this paper can be used to optimize the accident procedures of PWR nuclear power plants,and improve the ability of nuclear power plants to deal with the total loss of heat sink accident.