1) Geochemical and mineralogical characterization of rocks and fracture fillings of Boda Siltstone Formation and determination of chemical composition of ground water at the area;

2) Macroscopic (wet chemistry) investigations of key radionuclides in argillaceous rock systems (Opalinus Clay and Boda Siltstone systems) onsidered as potential host rocks for radioactive waste repositories;

3) Geochemical modelling of experimental sorption data (available codes: MINSORB, GEMS);

4) Bulk-XAS investigations on pure clay minerals to identify the surface sorbed species (inner sphere/outer sphere complexes);

5) X-ray microanalytical (microfluorescence/absorption/diffraction) and microtomography investigations on heterogeneous clay rich rock samples to identify the mineral responsible for the uptake of the radionuclides.