Transmission Probability Method based on Triangular-z Mesh
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摘要: 为了求解三维非结构几何中子输运方程,研究了基于三棱柱的穿透概率方法。三棱柱子区内部中子源采用平源分布近似,子区界面中子角注量率空间分布采用均匀分布近似,角度分布采用简化P1近似。在此基础上编制了适应于三维几何的中子输运问题求解的程序TPMTD,并对三维Takeda输运基准问题进行了校算,计算结果与参考值吻合良好。Abstract: This paper presents a transmission probability method（TPM） to solve the neutron transport equation in three-dimensional triangularz geometry.The source within the mesh is assumed to be spatially uniform and isotropic.At the mesh surface,the constant and the simplified P1 approximation are invoked for the anisotropic angular flux distribution.Based on this model,a code TPMTDT is encoded.It was verified by three 3D Takeda benchmark problems.The results of the present method agree well with those of Monte-Carlo calculation method and Spherical Harmonics method.
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