An Extension of the Non-negative Scattering Cross Section Generation Method for a Three Dimensional Geometry with Unstructured Tetrahedral Mesh

In this paper, the priority concept method to generate non-negative scattering cross section is extended to a three-dimensional geometry. The generated non-negative scattering cross sections are tested with an S_N solver which uses DFEM (Discontinuous Finite Element Method) with unstructured tetrahedral mesh. Two scalar uxes that are calculated with non-negative scattering cross sections and conventional P6 Legendre scattering cross sections are compared on an incident neutron beam problem and the results are shown. KCI Citation Count: 1