Verification and Validation of the FENDL-3.2c Library

The Fusion Evaluated Nuclear Data Library (FENDL) provides essential nuclear data for fusion research and applications. The release of version FENDL3.2b underwent comprehensive verification and validation (V&V) for neutrons, which has been reported in the associated FENDL reference paper. Since this release, a few evaluated nuclear data (ENDF) files for tungsten isotopes and ²³²Th in the neutron sublibrary and ⁷Li in the proton sublibrary have been updated. Also, technical fixes were applied to several files in the deuteron sublibrary. The processing of ENDF files to application files in ACE format is a crucial step for applications. Several important patches have been incorporated into the NJOY2016 processing code for the generation of improved application files from the FENDL ENDF files, impacting damage cross sections, heating, treatment of the unresolved resonance range, and charged-particle processing. The updated ENDF and ACE files have been released as FENDL3.2c. This paper describes these developments and provides the results of limited V&V. Along with the development of the nuclear data library, also the data governance of the FENDL project has been improved so that all updates (including processing) are fully traceable and FENDL users can perfectly reproduce application files on their own computing infrastructure.