Study on Method of Characteristics Based on Cell Modular Ray Tracing
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摘要: 为解决复杂几何条件下中子输运方程的求解问题,分析了特征线法理论模型,探讨了以栅元为模块的高效特征线产生方法,以及与之相关的空间角度离散和边界条件处理问题。采用自行研制的特征线法数值计算软件——PEACH,对经济合作组织核能机构(OECD/NEA) UO2和MOX燃料混合装载的7群(C5G7MOX)基准问题的数值进行了检验。结果表明,无论是计算keff还是棒功率分布该方法都具有很高的精度。Abstract: To address the issue of accurately solving neutron transport problem in complex geometry, method of characteristics (MOC) is studied in this paper, and a quite effective and memory saving cell modular ray tracing (CMRT) method is developed and related angle discretization and boundary condition handling issues are discussed. A CMRT based MOC code-PEACH is developed and tested against C5G7 MOX benchmark problem. Numerical results demonstrate that PEACH can give excellent accuracy for both keff and pin power distribution for neutron transport problem.
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Key words:
- Method of characteristics /
- Tracing /
- Neutron transport equation
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