Speaker
Description
The Joint Evaluated Fission and Fusion (JEFF) Nuclear Data Library is a collaboration among the OECD Nuclear Energy Agency (NEA) Data Bank participating countries with the aim to create a common set of evaluated nuclear data. This data is not only for fission and fusion applications but also for domains such as space and earth exploration, medical isotope production, and nuclear science. The latest JEFF nuclear data library, JEFF-4.0, was released in 2025, culminating 8 years of effort to create the most comprehensive dataset to date. This presentation provides a detailed overview on the advancements brought by JEFF-4.0 in comparison to former library versions as well as its performance in a broad range of application cases. Main priorities identified by the JEFF project towards the enhancement of the nuclear data library are described alongside the associated strategies for addressing them. The NEA Data Bank modernised infrastructure has strongly supported the JEFF‑4.0 release, and the presentation highlights how this updated environment — including the new processing pipeline — benefited its development.
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