INTERNATIONAL ATOMIC ENERGY AGENCY VIENNA ISBN 978 –92–0–101010–0 Considerable improvements have been made to the evaluated nuclear data files for 232Th, 231Pa and 233Pa, and these new data have been adopted, along with additional developments to existing evaluations for 232U, 233U, 234U and 236U for Th–U fuel cycle calculations. These evaluated data files are available on the IAEA web site in ENDF-6 format, as well as the equivalent processed libraries in ACE format for the MNCP family of Monte Carlo codes and in MATXS format for deterministic codes. The resulting evaluations for 232Th and for 231Pa and 233Pa have been adopted in the final version of the US ENDF/B-VII-0 nuclear applications library. This report represents the definitive documentation of this work by members of an IAEA coordinated research project.