宽脉冲中子注入下中子裂变链统计涨落的数值计算

计算物理 ›› 2005, Vol. 22 ›› Issue (2): 179-183.

宽脉冲中子注入下中子裂变链统计涨落的数值计算

徐乃新, 汤敏君

北京应用物理与计算数学研究所, 北京 100088

收稿日期:2003-10-16 修回日期:2004-06-23 出版日期:2005-03-25 发布日期:2005-03-25
作者简介:徐乃新(1936-),男,安徽,研究员,从事应用物理方面的研究,北京8009信箱100088.

A Numerical Calculation of Fission Chain Statistical Fluctuation with Wide-pulse Neutron Injection

XU Nai-xin, TANG Min-jun

Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

Received:2003-10-16 Revised:2004-06-23 Online:2005-03-25 Published:2005-03-25

摘要/Abstract

摘要： 研究了裂变系统在宽脉冲外中子源注入驱动下裂变链统计涨落问题.提出了概率分布W_n方程的分解-合成数值模拟计算方法,使裂变系统注入中子源数值模拟计算扩展到一般广义条件(具有任意时间分布、注入时间零点t₀概率分布函数P(t₀)和数概率分布S(n)等).同时讨论了应用物理模型的等效条件.将基本前提等效条件从单介质区模型扩展到多介质区模型.为解概率分布W_n方程必备参数提供了计算平均公式.

关键词: 宽脉冲外中子源, 统计涨落, 裂变链

Abstract: With wide-pulse neutron injection the fission chain fluctuates statistically.A calculation approach is presented, in which numerical solutions of the statistical distribution W_n equations are disassembled and then synthesized.It makes the computation suitable for generalized conditions (with arbitrary time distribution,zero time (t₀) injection probability distribution P(t₀) and number probability distribution S(n) etc.).The equivalent conditions in practical physical models are discussed and expanded from single-medium to multi-medium.In addition, the average computing formulae for required parameters in solving W_n equations are given as well.

Key words: wide pulse, outer neutron source, statistical fluctuation, fission chain

中图分类号:

徐乃新, 汤敏君. 宽脉冲中子注入下中子裂变链统计涨落的数值计算[J]. 计算物理, 2005, 22(2): 179-183.

XU Nai-xin, TANG Min-jun. A Numerical Calculation of Fission Chain Statistical Fluctuation with Wide-pulse Neutron Injection[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2005, 22(2): 179-183.

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