HFETR除气加压系统概率安全分析  

Probabilistic Safety Analysis of HFETR Degassing and Pressure System

作　　者：张江云[1] 周春林[1] 王文龙[1] 李海涛[1] 郑大吉 邹德光 李子彦[1] 陈启兵[1] 

机构地区：[1]中国核动力研究设计院,四川成都610005

出　　处：《核科学与工程》2017年第6期976-983,共8页Nuclear Science and Engineering

摘　　要：高通量工程试验堆(简称HFETR)除气加压系统给主冷系统提供静压,并除去一次水中辐射分解的气体,从而保证反应堆的运行安全。本工作应用RiskSpectrum软件,对HFETR运行期间除气加压系统开展概率安全评价(PSA)。通过整合部分法考虑共因故障,建立了以除气加压系统运行失效为顶事件的系统故障树模型,定量给出HFETR发生除气加压系统失效概率为2.013×10^(-4)。同时,以除气加压系统模型及运行可靠性数据为基础,进行了割集、重要度、灵敏度等分析,较全面地分析了该系统的风险水平,为系统升级和改造提供了重要参考。The Degassing and Pressure System of HFETR provide to pressure of the main cooling system, and removal of a water radiolysis gases, so as to ensure the safe operation of the reactor. Employing the RiskSpectrum software, HFETR Degassing and Pressure System is analyzed by using Probability Safety Assessment （ PSA ） methodology. Considering the Common Cause Failures （CCF）by employing Unified Partial Method（UPM）, the Degassing and Pressure System PSA model is built via constructing the fault trees with the running failure of Degassing and Pressure System as top event. Meanwhile,the consequentially quantity failure probability is presented as 2. 013 X 10-4. By input the reliability data from the HFETR operation,the unavailability of Degassing and Pressure System is presented. Furthermore,the analysis also involves in the Minimal Cut Set（MCS）analysis,importance measures and sensitivity calculations. Those analyses present an overview of the current Degassing and Pressure System risklevel,provide a considerable reference of the system change and update issues.

关 键 词：高通量工程试验堆 概率安全评价 除气加压系统 

分 类 号：O571.1[理学—粒子物理与原子核物理]