EURAD-2 - D18.1 DITUSC Green Paper

The DITUSC Green Paper, developed under EURAD-2, addresses the role of thermodynamic data in supporting Safety Cases for radioactive waste disposal. Thermodynamic modelling underpins key assessments of radionuclide behaviour, porewater chemistry, solubility limits, evolution/stability of materials and waste and sorption processes. These evaluations rely on high-quality, internally consistent thermodynamic databases (TDBs), such as, ThermoChimie, THEREDA, PSI/Nagra TDB, and others. Such thermodynamic databases form the basis of geochemical modelling knowledge and are incorporated into geochemical codes, enabling calculations to be performed according to (thermo)chemical principles (e.g., mass action law or Gibbs energy minimization).