On the Influence of Spatial Discretization on Cross Section Preparation with HELIOS 1.9

An analysis of the influence of the spatial discretization strategy for cell- and lattice calculations on the neutron flux distribution and the kinf value in a single cell is performed. The analysis shows a significantly different neutron flux distribution and kinf value for different discretizations. In addtion the preparation of few group cross sections for 3D nodal full core simulators is analyzed. Especially these cross sections are very sensitive on an appropriate spatial discretization.