论文部分内容阅读
非能动系统已广泛地应用于新一代堆的设计中,其可靠性分析成为新型反应堆概率安全评价(Probabilistic Safety Analysis,PSA)的重要内容。本文提出一种用于非能动系统可靠性分析的响应面拟合方法,并应用于中国铅基研究实验堆反应堆容器空气冷却系统(Reactor Vessel Air Cooling System,RVACS)的可靠性分析。采用流体计算软件Fluent模拟RVACS系统的输入输出作为求解响应面性能函数的输入样本,利用最小二乘法和bootstrap方法估计响应面性能函数的系数,以响应面模型代替Fluent模型分析RVACS系统的非能动失效概率。分析表明,在所有能动余热排除系统不可用的情况下,RVACS四组并联排热管中的两组也能够可靠地导出反应堆余热。RVACS系统可靠性高。
The passive system has been widely used in the design of the new generation reactor, and the reliability analysis has become an important part of the new Probabilistic Safety Analysis (PSA). In this paper, a response surface fitting method for the reliability analysis of passive systems is proposed and applied to the reliability analysis of China Reactor Vessel Air Cooling System (RVACS). Fluent is used to simulate the input and output of RVACS system as the input sample to solve the response surface performance function. The least square method and bootstrap method are used to estimate the coefficient of response surface function. Response surface model is used to analyze the passive failure of RVACS system instead of Fluent model Probability. The analysis shows that two of the RVACS four parallel heat extraction tubes can also reliably derive reactor waste heat with all active residual heat removal systems unavailable. RVACS system is highly reliable.