Comparative Analysis of Homogeneous and Heterogeneous Core Critical Experiments

摘要

Comparative analyses of the homogeneous core critical assembly ZPPR-4 Phase 1 and the heterogeneous core critical assembly ZPPR-7 Phase A have been performed whereby the impact of identical data and data processing changes is assessed for both types of cores. The data changes reflect the differences between ENDF/B-III and ENDF/B-IV, and the changes in data processing reflect differences in the heterogeneity treatment and in the calculation of the elastic removal cross sections. These differences impact differently on the homogeneous and heterogeneous cores. Use of the ENDF/B-IV data and the more rigorous data processing techniques removes a large part of the C/E discrepancies noted in ZPPR-7 Phase A, and both types of cores are essentially predicted consistently. (ERA citation 03:028392)