Technical Papers and Presentations

The safety assessment of the deep geological repository for nuclear waste of Olkiluoto (Finland) requires the evaluation of the influence of the land uplift (ice withdrawal) in groundwater. With this objective in mind, we have developed a three dimensional reactive transport model of the Olkiluoto, simulating the most relevant deformation zones in a three-dimensional domain. The evolution in groundwater patterns has been reproduced by the model, which has been coupled to an existing hydrogeological model. The chemical interaction of the meteoric water with fracture filling was simulated. Specifically, the main geochemical processes considered are: mineral dissolution and precipitation and cation exchange. All the work has been carried out with the interface COMSOL Multiphysics®-Phreeqc (iCP) (Nardi et al., 2014) .