CAJ | 학술논문

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。
림계수색재반응퇴물리분석，특별시연모분석、장시간척도물리분석등방면，유착중요적작용。수착계산궤기술적불단발전，몽특잡라림계수색이축점성위중요적림계수색방법。전통몽특잡라림계수색방법수다차림계계산과정，시간소모대，이차역피몽특잡라결과창락소영향。위료극복전통방법적불족，기우몽특잡라미우계산，제출료일충신적몽특잡라림계수색방법。해방법부수대초시계통진행1차림계계산，이용림계계산결과급미우계산결과，대유효증식인자변화곡선진행고계，병이차위기출득도림계수색적결과。계산결과표명，해방법가유효、준학지대림계수색문제진행계산，병유효지극복료전통방법적불족。
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 kef and differential coefficients of concerned parameter ,the polynomial estimator of kef changing function is solved to get the critical value of concerned parame-ter .The feasibility of this method was tested .The results show that the accuracy and efficiency of perturbation based criticality search method are quite inspiring and the method overcomes the disadvantages of traditional one .