EURAD-2 - D18.2 Documentation of exchange with the EURAD Community

The EURAD-2 Work Package (WP) "Development and Improvement of Thermodynamic Understanding for Use in Nuclear Waste Disposal Safety Case (DITUSC)" is a Strategic Study aiming to assess the current state of thermodynamic knowledge supporting the radioactive waste disposal Safety Case. DITUSC intends to identify knowledge gaps and evaluate strategies for improving the completeness of thermodynamic databases (TDB). It is foreseen to establish a common vision across the three EURAD-2 colleges for promoting future research and development initiatives to improve the application of thermodynamics in the Safety Case. The WP emphasises stakeholder engagement to understand their perspectives and needs regarding thermodynamic data and their use in relevant scenarios through various communication channels. To this end, DITUSC organized a series of virtual bilateral exchanges with key R&D Work Packages to identify, discuss, and align on critical thermodynamic knowledge gaps. This document presents both a high-level overview of cross-Work Package interactions and the resulting prioritized list of thermodynamic data gaps, forming part of the basis for the data gap prioritization evaluation conducted at the DITUSC Open Workshop in Nantes (19 to 20 November 2025).