Validation Comparison of SCALE-4.3 Using the 27 and 44 Group Cross-Section Libraries for Uranium Systems with Enrichments Between 0.72 and 10.0 wt% ~(235)U

摘要

This paper focuses on the differences noted in the validation of the SCALE-4.3 code for low enriched uranium (less than 10 wt%) systems. Emphasis is placed on the intermediate and fast neutron energy regions in addition to the commonly encountered thermal region for low enriched critical systems. To understand the impact and significance of the different validations the bias and bias uncertainty are determined for selected groups of experiments.