The Joint Evaluated Fission and Fusion File (JEFF) Nuclear Data Library Project is a collaboration between NEA Data Bank participating countries. The JEFF library combines the efforts of its different working groups to produce a common set of evaluated nuclear data, mainly for fission and fusion applications. The JEFF project meets twice a year, in autumn and spring. This edition of the Nuclear Data Week took place on 14-18 April 2025, and hosted both the JEFF Co-ordination Group and the JEFF technical sessions.
Please note that the following draft schedule is still subject to minor changes depending on the number of contributions:

A. Jiménez-Carrascosa, C-A. Manga-Collard, H. Nahon