The probabilistic safety analysis(PSA)technology,as a mature safety evaluation technology for nu-clear power plants,has been widely used in the design,operation,maintenance and technical alteration of nucle-ar power plants.The PSA work in China started in the 1980 s and has developed rapidly in recent years.In Chi-na,the regulatory body National Nuclear Safety Administration(NNSA)also encourages nuclear power plants to use the combination of PSA and deterministic approach to evaluate and optimize the safety of production,op-eration and maintenance activities of power plants.There are 9 units in operation at Qinshan site,which are technically supported by(China Nuclear Power Operation Management Co.,Ltd.(CNNO).The development of PSA by CNNO began in 2001.Since then,the PSA model of each unit has been continuously improved.All these lay a solid foundation for the application of PSA in CNNO.In addition,the PSA is introduced into the safety evaluation of power plants and corresponding management procedures are established.Thus,a set of risk-informed application systems have been formed for the use in plant maintenance,operation and other pro-duction activities.It plays an important role in ensuring the safe and stable operation of power plants and impro-ving the operation efficiency of power plants.
基于控制棒的保证停堆状态(RBGSS)为秦山重水堆堆型(CANDU6)提供了一种新的保证停堆方式.本文介绍了在秦山CANDU6机组首次成功应用RBGSS技术的实践过程,包括RBGSS实施前充分的技术论证、技术文件开发及实施沙盘推演,实施过程的有效控制.总结了实施的经验,为后续更好应用RBGSS技术提供了改进方向和建议.
本文简要介绍了应急柴油发电机调试程序与IEEE 387-2017中的对应章节,并通过对海外"华龙一号"应急柴油发电机试验模式中止测试失败的详细分析,发现"华龙一号"应急柴油发电机不具备试验模式中止测试功能,因此应急柴油发电机定期试验只进行不并网的低功率试验,相比并网试验操作复杂,建议后续"华龙一号"应急柴油发电机增加并网时通过应急启动信号进行切换操作的逻辑,实现月度试验通过并网来实施,同时满足IEEE 387-2017的各项要求.
长期运维方案的经济性分析通过对包含预防性维修成本、纠正性维修成本等内容的多个维修方案的费用计算,确定最佳的维修方案.介绍了长期运维方案的经济性分析方法,给出了 Comanche Peak电厂的算例和计算结果,还讨论了上述方法应用到我国核电厂应注意的问题,包括失效率计算、换料周期问题和净现值问题.为我国核电厂建立长期运维方案的经济性分析的通用方法提供了参考.
水利部对核电项目水土保持方案的批复是申请核电厂项目核准的必要文件之一.为了能够顺利获得水利部对核电厂项目水土保持方案的批复,从而具备申请项目核准条件,需要对申请核电厂水土保持方案批复工作的各个环节进行分析,明确各个环节存在的难点并且给出相应的应对措施.本文对水土保持方案编制、方案上报水利部、召开评审会等环节中存在的难点进行了分析,并给出了应对措施.对于核电工程水土保持方案取得水利部的批复有一定的指导性.
