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次临界系统α本征值计算

Calculate α eigenvalue in subcritical systems
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摘要 从α本征值(中子时间常数)的概念出发,使用与时间有关的扩散理论和本征函数展开方法,研究不同半径下的Li2O、氢系统及铀、含氢铀次临界系统能谱及α本征值随时间变化的规律。计算中使用了30群群截面数据,微观数据来自ENDF/B-Ⅵ。 In this paper, using the definition of α eigenvalue, a time dependent multigroup diffusion equation and eigenfunction expansion method has been introduced. For assemblies of different sizes, the effects on neutron spectrum and a eigenvalue with time in Li2O and multiplying systems are discussed. The 30 group library derived from ENDF/B-VI has been used in numerical calculations.
出处 《核科学与工程》 CSCD 北大核心 2007年第4期300-304,共5页 Nuclear Science and Engineering
基金 计算物理实验室基金资助项目(51479050105ZW0906)
关键词 α本征值 k本征值 中子能谱 α eigenvalue k eigenvalue neutron spectrum
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参考文献8

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