压水堆核电厂燃料破损前后的供电可靠性研究

Study on Power Supply Reliability of PWR Nuclear Power Plant before and after Fuel Failure

为最大程度减少因燃料操作与贮存系统(PMC)燃料操作设备供电不可靠造成的核燃料元件破损事件,以及核燃料元件破损后快速切换到碘过滤通风系统而不向公众流出,分别从PMC燃料操作设备的供电结构及确保碘过滤通风系统可靠工作的辅助供电结构角度进行分析。通过推演电源逻辑关系,总结出2套供电方案的一次图。研究结果表明,通过供电可靠性的预测,可快速建立PMC燃料操作系统及其碘过滤通风辅助系统的供电模型,为及时干预运行及维修提供了指向性,可用于核电厂核燃料相关事故下快速恢复设备可用性的操作。

In order to minimize the damage of nuclear fuel elements caused by unreliable power supply of PMC fuel operating equipment,and to switch to iodine filtration ventilation system quickly after the nuclear fuel element is damaged without flowing out to the public,the paper analyzes the power supply structure of PMC fuel operation equipment and auxiliary power supply structure to ensure the reliable operation of the iodine filtration ventilation system.Through the deduction of power logic relationship,the primary diagram of two sets of power supply is summarized.The results show that the power supply model of PMC fuel operating system and its iodine filtration ventilation auxiliary system can be established quickly by the prediction of power supply reliability,which provides a guidance for timely intervention in operation and maintenance,and can be used for the operation of equipment availability recovery in nuclear fuel related accidents in nuclear power plants.