| 求解中子输运SP3方程的半解析节块方法 |
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| 引用本文： | 李志勇.求解中子输运SP3方程的半解析节块方法[J].核科学与工程,2012,32(1):8-15. |
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| 作者姓名： | 李志勇 |
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| 作者单位： | 上海核工程研究设计院,上海,200233 |
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| 摘 要： | 中子输运简化P3 (SP3)方法是对中子输运方程PN的一种近似,可以转换为与中子扩散方法相似的形式.采用节块方法中有效的半解析方法求解中子输运SP3方程,同时也基于粗网有限差分(CMFD)方法采用细网有限差分(FMFD)形式同样求解该方程.通过对NEACRP-L-336基准题(修改)的数值计算,验证了通过Pin-By-Pin的节块计算能够获得与FMFD几乎相同的结果,而Pin-By-Pin的CMFD计算结果与FMFD计算结果有一定的偏差.
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| 关 键 词： | 中子输运 SP3 半解析节块方法 粗网有限差分 |
Semi-analytic nodal methods for neutron transport SP3 equation |
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| LI Zhi-yong.Semi-analytic nodal methods for neutron transport SP3 equation[J].Chinese Journal of Nuclear Science and Engineering,2012,32(1):8-15. |
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| Authors: | LI Zhi-yong |
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| Affiliation: | LI Zhi-yong(Shanghai Nuclear Engineering Research and Design Institute,Shanghai 200233,China) |
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| Abstract: | Neutron transport simplified P3(SP3) equation which is an approximation to the neutron transport PN equation,can be transferred to a format similar to the traditional neutron diffusion equation.Solving the SP3 equation is implemented by semi-analytic nodal method which is one of the effective nodal method,and also by coarse mesh finite difference(CMFD) method with fine mesh finite difference(FMFD) format.By numerical analysis of NEACRP L-336 benchmark(modified),it is demonstrated that pin-by-pin nodal calculation can obtain almost the same result as FMFD,but pin-by-pin CMFD result has some deviation to the FMFD result. |
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| Keywords: | neutron transport SP3 semi-analytic nodal method coarse mesh finite difference |
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