CPR1000机组核级止回阀的抗震分类和力学评估问题分析  

Analysis of about Seismic Classification and Mechanical Evaluation of the Nuclear Check Valve for CPR1000Unit

作　　者：杨腊腊 陈秋炀[1] 邵辉 YANG Lala;CHEN Qiuyang;SHAO Hui(Suzhou Nuclear Power Research Institute,Suzhou,Jiangsu Prov.215004,China)

机构地区：[1]苏州热工研究院有限公司,江苏苏州215004

出　　处：《中国核电》2024年第5期669-673,共5页China Nuclear Power

摘　　要：目前,CPR1000机组针对执行同样安全功能的止回阀的抗震分类存在差异,行业内针对核级止回阀的抗震分类也存在一定的争议。然而,核级止回阀的抗震分类将直接影响阀门力学评估中所采用的应力验收准则,进而影响阀门执行其安全功能的可靠性。本文以CPR1000机组辅助给水系统(ASG)中一典型核级旋启式止回阀为例,基于CPR1000机组设计中所依据的RCC系列标准及电厂执照文件中的抗震分类和力学评估要求,并结合阀门的安全功能,给出了阀门合理的抗震分类和力学评估建议,可为CPR1000机组及同类机组核级止回阀的抗震分类和力学评估提供针对性的指导。本文提出的结论和建议对于进一步提升机组的安全运行水平具有重要的意义。At present,there are differences in seismic classification of check valves with the same safety function in CPR1000,and there are some disputes on seismic classification of nuclear check valves in the industry.However,the seismic classification of nuclear check valve will directly affect the stress acceptance criteria used in the mechanical evaluation of the valve,and then affect the reliability of the valve to perform its safety function.In this paper,a typical nuclear swing check valve in the auxiliary feed water system(ASG)of CPR1000is taken as an example,based on the RCC series standards for CPR1000design and the requirements of seismic classification and mechanical evaluation in the license documents,and combined the safety function of the valve,the reasonable seismic classification and mechanical evaluation suggestions of the valve are given,which can provide targeted guidance for seismic classification and mechanical evaluation of the nuclear check valve for CPR1000and similar units.The conclusions and suggestions put forward in this paper are of great significance to further improve the safe operation level of nuclear power plant.

关 键 词：CPR1000机组 核级止回阀 抗震分类 力学评估 

分 类 号：TM623[电气工程—电力系统及自动化]