Research on Thermal Neutron Scattering Data for Compounds

Abstract

ACE files applied by MCNP contain data only at several certain temperature points. It is necessary to process thermal ACE files at any interested temperature points including the high temperature for SCWR in order to make a more accurate calculation, especially for H2O and D2O which are very important in thermal neutron calculations. Based on the research on theory and process of thermal neutron scattering in compounds, ACE files for H2O, D2O, and some other important scattering kernels have been processed. We named this new ACE libaray SabDEP. Validation have been done by comparison of cross sections, neutron flux density spectrum, and the burnup calculation. Differences of D2O data between ENDF/B-VI and VII have been found.