| 六角形布置反应堆高保真物理计算方法研究与验证 |
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| 引用本文： | 陈俊辑,刘宙宇,曹璐,曹良志.六角形布置反应堆高保真物理计算方法研究与验证[J].核动力工程,2022,43(1):7-14. |
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| 作者姓名： | 陈俊辑 刘宙宇 曹璐 曹良志 |
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| 作者单位： | 西安交通大学核科学与技术学院，西安，710049 |
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| 基金项目： | 国家自然科学基金（11775169,11735011）； |
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| 摘 要： | 俄罗斯商用压水堆VVER和大多数实验堆均采用了六角形紧凑型栅格布置，为了实现VVER和六角形实验堆的高保真数值模拟分析，本文基于数值反应堆物理计算程序（NECP-X）开展了六角形堆芯高保真计算方法研究和程序开发。首先，将全局-局部耦合共振自屏计算方法拓展至六角形堆芯，实现六角形堆芯燃料棒的全堆芯高精度共振计算；其次，基于2D/1D耦合输运计算方法研究了六角形堆芯的高保真计算方法；最后，为了提高全堆芯计算的计算效率，研究了基于区域分解松耦合的非结构网格的粗网有限差分（CMFD）加速方法，可以实现以矩形、六角形和其他多边形栅元为基础的pin-by-pin CMFD 加速。为了验证六角形堆芯高保真计算方法的精度和效率，计算了六角形C5G7基准问题，并分析了六角形输运计算方法的计算精度和CMFD方法的加速效果；将NECP-X程序应用于西安脉冲堆的2D全堆芯计算，与蒙特卡罗程序的结果对比表明NECP-X程序计算得到的特征值和功率分布均具有较高精度。因此，本文建立的六角形堆芯高保真计算方法可以应用于六角形堆芯的分析计算。
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| 关 键 词： | 数值反应堆物理计算程序（NECP-X） 六角形堆芯 特征线方法（MOC） 粗网有限差分（CMFD）加速 2D/1D计算 |
| 收稿时间： | 2020-12-17 |
Research and Verification of High-Fidelity Physics Calculation Method for Hexagonal Reactor |
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| Chen Junji,Liu Zhouyu,Cao Lu,Cao Liangzhi.Research and Verification of High-Fidelity Physics Calculation Method for Hexagonal Reactor[J].Nuclear Power Engineering,2022,43(1):7-14. |
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| Authors: | Chen Junji Liu Zhouyu Cao Lu Cao Liangzhi |
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| Affiliation: | School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an, 710049, China |
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| Abstract: | Russian commercial pressurized water reactor VVER and most experimental reactors adopt hexagonal compact lattice arrangement. To realize the high-fidelity numerical simulation analysis of the VVER and the hexagonal experimental reactor, in this paper, the high-fidelity calculation method and program development of hexagonal core are carried out based on NECP-X. First, the global-local coupled resonance self-shielding calculation method is extended to the hexagonal core to realize the high-precision resonance calculation of hexagonal core fuel rods; Second, based on 2D/1D coupled transport calculation method, the high-fidelity calculation method of hexagonal core is studied; Finally, in order to improve the calculation efficiency of the full-core calculation, the coarse-mesh finite-difference (CMFD) acceleration method based on the loosely coupled unstructured grid of domain decomposition is studied, which can realize pin-by-pin coarse-mesh finite-difference acceleration based on rectangular, hexagonal and other polygonal cells. In order to verify the accuracy and efficiency of the hexagonal core high-fidelity calculation method, the hexagonal C5G7 benchmark problem is calculated, and the calculation accuracy of the hexagonal transport calculation method and the acceleration effect of the CMFD method are analyzed; NECP-X is applied to the two-dimensional full core calculation of a pulsed reactor in Xi’an. The comparison with the results of Monte Carlo program shows that the eigenvalues and power distribution calculated by NECP-X have high accuracy. Therefore, the high-fidelity calculation method of hexagonal core established in this paper can be applied to the analysis and calculation of hexagonal core. |
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| Keywords: | NECP-X Hexagonal core Method of characteristics(MOC) CMFD acceleration 2D/1D calculation |
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