| 宽脉冲中子注入下中子裂变链统计涨落的数值计算 |
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| 引用本文： | 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. |
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| 作者姓名： | 徐乃新 汤敏君 |
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| 作者单位： | 北京应用物理与计算数学研究所,北京,100088;北京应用物理与计算数学研究所,北京,100088 |
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| 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Wn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Wn方程必备参数提供了计算平均公式.
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| 关 键 词： | 宽脉冲外中子源 统计涨落 裂变链 |
| 文章编号： | 1001-246X(2005)02-0179-05 |
| 收稿时间： | 2003-10-16 |
| 修稿时间： | 2003年10月16 |
A Numerical Calculation of Fission Chain Statistical Fluctuation with Wide-pulse Neutron Injection |
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| 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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| Authors: | XU Nai-xin TANG Min-jun |
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| Institution: | Institute of Applied Physics and Computational Mathematics, Beijing 100088, China |
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| 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 (t_0) injection probability distribution P(t_0) 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. |
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| Keywords: | wide pulse outer neutron source statistical fluctuation fission chain |
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