APPLICATION OF LOCAL BASIS PSEUDO-HARMONICS METHOD

The alternative pseudo-harmonics method, in conjunction with local basis procedures, is applied to compute perturbed neutron flux shapes and eigenvalue in a two-group, seven region, I-D representation of a reactor core. Definition of a region of interest smaller than the core domain allows a significant reduction in the number of pseudo-harmonics employed, with corresponding reduction in computational effort, while preserving small relative error in flux shapes (maximum relative error of 0.04%) and no error at all in eigenvalue.