中文摘要：

C5G7基准例题因其具有强烈非均匀性、组件能谱差异大等特点,常用来检验软件计算有效性。在对栅元进行不同的几何等效和对原有的栅元等效均匀化方法进行改进的情况下,采用二维离散纵标法输运计算程序SN2D对C5G7基准例题进行了分析计算,给出了各种计算条件下keff和功率分布的计算误差。结果表明,SN2D程序可应用于C5G7基准例题的求解。计算结果可为求解类似问题时计算程序及条件的选择提供直接参考。

英文摘要：

Because of its strong nonhomogeneity and large difference of spectrum between assemblies,C5G7 benchmark is usually used to test the efficiency of the computation code.When using different geometric equivalence methods for cells and an improved method for the cell homogenization,C5G7 benchmark was calculated by SN2D which was a two dimensional discrete ordinate transport code.The errors of the eigenvalue and pin power distributions were analyzed for various calculation conditions.The results show that the SN2D code can be used for the C5G7 benchmark.The calculation results can provide a direct reference to such problems as C5G7 benchmark.