Evaluation of the 80-group KAFAX library using JEFF3.0, ENDF/B-VI.8 and JENDL3.3 for minor actinide and fission product transmutation

Abstract

For a core design work of a nuclear transmutation reactor, nuclear data were added to the KAFAX-F22 library based on three master libraries, JEFF3.0, ENDF/B-VI.8 and JENDL3.3. Evaluation of the modified library was done by comparing criticality and the reaction ratio with experimental data. Evaluation of Cm-244 and Np-237 was calculated by TRANSX and DANTSYS for critical assemblies, JEZEBEL and FLATTOP. For the evaluation of minor actinide isotopes for which there was no experiment, calculation results of benchmark problems were compared with MCNP4c2 results. The geometry and composition of these problems are those of the reference model for the Pb–Bi cooled fast spectrum transmutation reactor. There were good agreements among the evaluation data for most of the isotopes except Am-241, Am-243, Cs-135 and Cs-137. In case of Cm-242, results of the KAFAX library from ENDF/B-VI.8 showed a large discrepancy in reactivity worth compared with other libraries.