Complete Optimization of Space/Energy Cell Importances with the DSA Cell Importance Model

Abstract A complete procedure for calculating optimum importances in space/energy cells has been implemented. It is based on the DSA Cell Importance model and consists of two steps: generation of the second moment and time functions and minimization of their product. Two approaches to generating the second moment function are available: calculation of the exact function or of a function based on a point-surface approximation. Sample problems are treated using both approaches.