| 全堆芯Pin by Pin中子扩散节块法CMFD加速 |
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| 引用本文： | 李志勇. 全堆芯Pin by Pin中子扩散节块法CMFD加速[J]. 计算物理, 2019, 36(3): 317-322. DOI: 10.19596/j.cnki.1001-246x.7867 |
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| 作者姓名： | 李志勇 |
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| 作者单位： | 中广核研究院有限公司, 深圳 518031 |
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| 摘 要： | 采用节块方法中有效的半解析方法求解中子扩散方程,在径向采用pin by pin的计算方式且中子通量基于两阶展开,在轴向采用基于4阶展开中子通量的节块法,并且进行全堆粗网有限差分(CMFD)加速,以达到计算精度与计算效率的平衡.通过IAEA 2D/3D基准问题和自定义3D pin by pin参考问题的数值计算,验证所提出的方法能够达到预期的精度,同时CMFD能够取得很好的加速效果.
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| 关 键 词： | 中子扩散 PIN by PIN 半解析节块方法 粗网有限差分 |
| 收稿时间： | 2018-03-26 |
| 修稿时间： | 2018-06-21 |
Full Core Pin by Pin Neutron Diffusion Nodal Method Based on CMFD Acceleration |
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| LI Zhiyong. Full Core Pin by Pin Neutron Diffusion Nodal Method Based on CMFD Acceleration[J]. Chinese Journal of Computational Physics, 2019, 36(3): 317-322. DOI: 10.19596/j.cnki.1001-246x.7867 |
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| Authors: | LI Zhiyong |
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| Affiliation: | China General Nuclear Research Institute Company, Shenzhen 518031, China |
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| Abstract: | A classical semi-analytical nodal method for neutron diffusion equation with second order neutron flux expansion in radial pin by pin level and 4th order expansion for axial neutron flux is used. A full core coarse mesh finite difference (CMFD) acceleration is adopted in order to achieve good calculation accuracy and efficiency. With IAEA 2D/3D benchmark problem and self-define 3D pin by pin reference problem numerical calculation, it is demonstrated that the proposed methodology achieve anticipated accuracy and with very good CMFD acceleration. |
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| Keywords: | neutron diffusion pin by pin semi-analytic nodal method coarse mesh finite difference |
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