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. The next edition of the Nuclear Data Week will take place on 22-26 April 2024, and will host both the JEFF Co-ordination Group and the JEFF technical sessions.
D. Foligno, C-A. Manga-Collard, H. Nahon