先进轻水反应堆核电厂取消运行基准地震的原因和措施
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摘要
在先进轻水反应堆业主文件(ALWR-URD)中提出对核电厂抗震设计取消运行基准地震(OBE)的要求,其观点是没有必要执行OBE和SSE两套完整的抗震分析方法。美国核管理委员会(NRC)有关部门也讨论了从安全停堆地震(SSE)如何消除OBE影响的问题,认为OBE不应当控制安全系统的设计,并根据过去核电厂抗震设计研究与经验编制了相应的备忘录,于1993年得到NRC批准。本文根据该备忘录内容整理了两大问题:取消OBE的背景和原因,取消OBE后所采用的措施和方法。并从核电厂构筑物、管道、支承件、设备以及电厂震后决策等几方面的抗震要求进行了论述。
The requirement to eliminate operating-basis earthquake(OBE) for nuclear power plant seismic design is put forward in advanced light water reactor(ALWR) utility requirement documents(URD),whose position is that it's unnecessary to perform two complete sets of seismic analyses: one for the OBE and one for the safe-shutdown earthquake(SSE).Relevant Nuclear Regulatory Commission(NRC) departments also discussed the question of how to decouple OBE from SSE.They proposed OBE shouldn't control the design of safety-related systems,and corresponding memorandums,which were approved by NRC in 1993,were complied according to past research and experience of seismic design of nuclear power plants.This paper deals with two problems according to the memorandums.One is the background and reasons to eliminate OBE,and the other is measures and methods adopted after elimination of OBE,both of which are discussed from seismic requirements of such aspects as structures,pipes,supports,equipments,and decision making after the earthquake.
The requirement to eliminate operating-basis earthquake(OBE) for nuclear power plant seismic design is put forward in advanced light water reactor(ALWR) utility requirement documents(URD),whose position is that it's unnecessary to perform two complete sets of seismic analyses: one for the OBE and one for the safe-shutdown earthquake(SSE).Relevant Nuclear Regulatory Commission(NRC) departments also discussed the question of how to decouple OBE from SSE.They proposed OBE shouldn't control the design of safety-related systems,and corresponding memorandums,which were approved by NRC in 1993,were complied according to past research and experience of seismic design of nuclear power plants.This paper deals with two problems according to the memorandums.One is the background and reasons to eliminate OBE,and the other is measures and methods adopted after elimination of OBE,both of which are discussed from seismic requirements of such aspects as structures,pipes,supports,equipments,and decision making after the earthquake.
引文
[1]The passive ALWR-NPP,ALWR-URD.Ⅲ[R].US:Electric Power Research Insititute,1995.
[2]JAMES M T.Elimination of operating-basisearthqure policy issue,NRC-SECY-93-087,Ⅰ-M[R].US:Nuclear Regulatory Commission,1993.
[2]JAMES M T.Elimination of operating-basisearthqure policy issue,NRC-SECY-93-087,Ⅰ-M[R].US:Nuclear Regulatory Commission,1993.
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