THEREDA represents a web-based system of programs enabling access to thermodynamic reference data for the needs of the final disposal of radioactive waste in Germany. It is the only polythermal database worldwide that covers the entire system of oceanic salts, including acids, bases and carbonates. THEREDA aims at calculation of solubilities in high-saline solutions and uses the Pitzer approach.

The determination of flow parameters in a low-permeability clay was made possible by long-term observation pressure and flow rate data and the consideration of the precise experimental set-up composed of two parallel boreholes with three observation sections each. Using 3D modelling and properly specified geometry and conditions, it has been possible to determine the water flow properties of the Callovo–Oxfordian Clay at the decameter scale, which is a unique determination in tight clay.

This work presents a semi-analytical approach to modelling matrix diffusion in fractured media. It can readily be applied to assess potential radionuclide releases from a deep geological repository for radioactive waste without using a numerical code.

It has been recently recognized that the availability of liquid water may be a controlling factor for metal corrosion in a storage facility for radioactive waste. Since water is an educt for anaerobe corrosion, the reaction may be suspended or suppressed by the scarcity of water near the corroding surfaces. Gas pressure build-up through hydrogen generation may limit further water ingress. Our model focuses on the close coupling between gas generation through iron corrosion and water availability.