反应堆时空动力学蒙特卡罗改进准静态方法研究  

Research on Monte Carlo Improved Quasi-Static Method for Reactor Space-Time Dynamics

作　　者：徐琪[1] 王侃[1] 李世锐[1] 余纲林[1] 

机构地区：[1]清华大学工程物理系,北京100084

出　　处：《原子能科学技术》2013年第B06期275-279,共5页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(91126017)

摘　　要：改进准静态方法可采用大时间步,减少反应堆时空动力学问题的计算耗时。本文提出了蒙特卡罗改进准静态方法,将两种方法的优势结合,用于新型反应堆的时空动力学问题。基于改进准静态方法的理论框架,研究设计了伴随通量统计、动态参数统计和形状函数计算等相应的蒙特卡罗算法。针对一维两群问题,实现了相应的算法。与确定论程序计算结果的比较表明,蒙特卡罗改进准静态方法是可行的。With large time steps,improved quasi-static（IQS） method can improve the calculation speed for reactor dynamic simulations.The Monte Carlo IQS method was proposed in this paper,combining the advantages of both the IQS method and MC method.Thus,the Monte Carlo IQS method is beneficial for solving space-time dynamics problems of new concept reactors.Based on the theory of IQS,Monte Carlo algorithms for calculating adjoint neutron flux,reactor kinetic parameters and shape function were designed and realized.A simple Monte Carlo IQS code and a corresponding diffusion IQS code were developed,which were used for verification of the Monte Carlo IQS method.

关 键 词：时空动力学 改进准静态方法 蒙特卡罗方法 

分 类 号：TL327[核科学技术—核技术及应用]