THEREDA – A thermodynamic reference database for nuclear waste disposal in Germany

The long-term safety of radioactive waste disposal in deep geological repositories with respective reliable predictions is an important fact in the disposal site selection process. To ensure the safety geochemical modeling calculations using comprehensive and consistent thermodynamic data are required.
The relational databank THEREDA will provide such thermodynamic datasets. It takes into account specific German requirements (high ionic strengths in salt host rocks) and temperatures up to 100°C. Available databases do not suffice these needs because of very restrictive data selection procedures or heterogeneous and inconsistent data. THEREDA mainly builds on data derived from solution experiments with a focus on ternary and higher systems.
The application of referential integrity, thermodynamic dependencies, alternative datasets and uncertainty estimates allows THEREDA to deliver tailor-made parameter files for use in geochemical modeling software like EQ3/6, GWB and ChemApp.
To enhance public use THEREDA is accessible via internet.