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 April 2021 Nuclear Data Week will host the JEFF Co-ordination Group meetings and a selection of JEFF technical sessions.
Register here for the April 27-30 2021 sessions : https://www.oecd-nea.org/confdb/confdb/conf?id=462
More information will be made available in due course.