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Influence of DC Supply Systems on Unplanned Reactor Trips in Nuclear Power Plants
作者姓名:李君利  童节娟  茆定远
作者单位:LI Junli,TONG Jiejuan,MAO DingyuanInstitute of Nuclear Energy Technology,Tsinghua University,Beijing 100084,China
摘    要:IntroductionMany factors influence the economics ofnuclear power plants.Unplanned reactor trips arethe most important factors,so it has beeninvestigated from various aspects because oftheirinfluence on the operating capacity factor inNuclear Power Plants ( NPPs ) .Operationalexperience has shown thatsome components in theNPPs are so importantthattheir failure may causethe entire plantto shutdown.Such shutdowns haveoften occurred in the pastin the NPPs.So,nuclearpowerplantauthorities have…


Influence of DC Supply Systems on Unplanned Reactor Trips in Nuclear Power Plants
LI Junli,TONG Jiejuan,MAO DingyuanInstitute of Nuclear Energy Technology,Tsinghua University,Beijing ,China.Influence of DC Supply Systems on Unplanned Reactor Trips in Nuclear Power Plants[J].Tsinghua Science and Technology,2001(1).
Authors:LI Junli  TONG Jiejuan  MAO DingyuanInstitute of Nuclear Energy Technology  Tsinghua University  Beijing  China
Institution:LI Junli,TONG Jiejuan,MAO DingyuanInstitute of Nuclear Energy Technology,Tsinghua University,Beijing 100084,China
Abstract:Operational experience has shown that some components in nuclear power plants are so important that their failures, which would be a single failure, may cause the entire plant to shutdown. Such shutdowns have often occurred in the past in commercial nuclear power plants. Nuclear power plant authorities try to avoid such unplanned plant shutdowns because of the large economic loss. Unfortunately, it is difficult to identify all the important components from the numerous components in each complex nuclear power plant system. FMEA and FTA methods, which are often applied to probabilistic risk assessments, are used in this paper to identify the key components that may cause unplanned reactor trips. As an example, the 48V DC power supply system in a typical Chinese nuclear power plant, which is a major cause of many unplanned reactor trips, was analyzed to show how to identify these key components and the causes for nuclear power plant trips.
Keywords:Nuclear Power Plant (NPP)  Probabilistic Risk Assessment (PRA)  Failure Mode Effect Analysis (FMEA)  Fault Tree Analysis (FTA)
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