摘要
研究了弱中子源驱动下，裂变系统中子裂变链统计涨落问题的数值计算方法。进行了数值计算建模、数值方法分析、数值计算检验、一类问题概率分布函数的统计涨落特征量的数值计算示范。特例数值检验表明：只要数值解方程组阶数（ 截断） Ｎ足够大，数值解满足归一（守恒） 律、指数增长律，并与精确解析解一致。对于非定常裂变系统中子裂变链统计涨落问题提出了一维等效模型下数值模拟的方法。
A numerical method of the statistics fluctuation problem of fission chains is studied for fission system driven by a weak neutron source.Constructing model of numerical simulation,analysis of numerical method,examinations of numerical simulation,demonstrating of numerical simulation for a kind of problem have been done.Examinations of numerical simulation for special example indicated that so long as the order of the system of numerical siumlation ( N ) is large sufficiently,numerical solutions satisfy normalization(conservation)law、population growth exponential law,and approach to the exact analytic solution.An one diminsional equivalenly modelling numerical method is presented for statistics fluctuation problem of neutron fission chains in unsteady fission system.
出处
《计算物理》
CSCD
北大核心
1999年第6期580-586,共7页
Chinese Journal of Computational Physics
基金
国防科技预先研究跨行业项目可靠性共性技术基金
关键词
中子裂变链
统计涨落
概论分布函数
数值计算
neutron fission chain
statistics fluctuation
function of the probability distribution.
