基于微扰的蒙特卡罗反应堆临界搜索研究  

Research on Perturbation Based Monte Carlo Reactor Criticality Search

作　　者：李泽光[1,2] 王侃[2] 邓景康[1] 李杨柳[2] 

机构地区：[1]清华大学物理系,北京100084 [2]清华大学工程物理系,北京100084

出　　处：《原子能科学技术》2013年第B12期645-649,共5页Atomic Energy Science and Technology

基　　金：压水堆重大专项资助项目(2011ZX06004-024);国家自然科学基金资助项目(91126017);973计划资助项目(2007CB209807)

摘　　要：临界搜索在反应堆物理分析,特别是燃耗分析、长时间尺度物理分析等方面,有着重要的作用。随着计算机技术的不断发展,蒙特卡罗临界搜索已逐渐成为重要的临界搜索方法。传统蒙特卡罗临界搜索方法需多次临界计算过程,时间消耗大,而且易被蒙特卡罗结果涨落所影响。为了克服传统方法的不足,基于蒙特卡罗微扰计算,提出了一种新的蒙特卡罗临界搜索方法。该方法仅需对初始系统进行1次临界计算,利用临界计算结果及微扰计算结果,对有效增殖因子变化曲线进行估计,并以此为基础得到临界搜索的结果。计算结果表明,该方法可有效、准确地对临界搜索问题进行计算,并有效地克服了传统方法的不足。Criticality search is a very important aspect in reactor physics analysis. Due to the advantages of Monte Carlo method and the development of computer technologies, Monte Carlo criticality search is becoming more and more necessary and feasible. Tradi- tional Monte Carlo criticality search method is suffered from large amount of individual criticality runs and uncertainty and fluctuation of Monte Carlo results. A new Monte Carlo criticality search method based on perturbation calculation is put forward in this paper to overcome the disadvantages of traditional method. By using only one criticality run to get initial keff and differential coefficients of concerned parameter, the polynomial estimator of keff changing function is solved to get the critical value of concerned parameter. The feasibility of this method was tested. The results show that the accuracy and efficiency of perturbation based criticality search method overcomes the disadvantages of traditional one,

关 键 词：反应堆临界搜索 蒙特卡罗方法 微扰计算 

分 类 号：TL329.2[核科学技术—核技术及应用]