不同算法的复杂燃耗链求解对比分析  

Analysis of Complex Nuclide Chain Equation Calculation Based on Different Method

作　　者：唐松乾[1] 肖锋[1] 谭怡[1] 魏述平 

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213

出　　处：《核动力工程》2016年第1期8-12,共5页Nuclear Power Engineering

摘　　要：复杂燃耗链的求解在许多方面都有重要的应用。ORIGEN-S程序是广泛使用的复杂燃耗链求解工具,本文将介绍其基本原理,并通过导出ORIGEN-S随燃耗变化的燃耗矩阵,使用切比雪夫有理近似的方法进行求解,对比不同算法在复杂燃耗链求解中的差异。结果证明,对于大部分核素,2种算法的偏差非常小,但由于ORIGEN-S假设长半衰期核素生成的短半衰期核素处于平衡状态,使得部分核素浓度的计数结果偏于保守,随着燃耗的加深这种偏差逐渐减小。Depletion calculation of a large number of isotopes plays a very important role in many fields, and ORIGEN-S is the most widely used complex nuclide chain equation calcula^ion code. In this paper, the theory of ORIGEN-S is presented, the time-dependent bumup matrix is explorted and solved using Chebyshev rational approximation method. Results comparing with ORIGEN-S show that, for most of the nuclides, the difference between two methods is quite small, but because ORIGEN-S assumes that the short-lived nuclide is in balance with its long-lived precursor, the result of some nuclides can be conservative, and the deeper the depletion the smaller the difference.

关 键 词：复杂燃耗链 ORIGEN—S CRAM方法 

分 类 号：TL277[核科学技术—核燃料循环与材料]