The modelling work consists of computer simulations of the disposal system components and experiments. Modelling is above all a tool for learning and understanding more about the processes that occur in the disposal system. It makes it possible to optimise the experiments and is a precise tool for the interpretation of results. Modelling makes it possible to evaluate our knowledge in comparison to experimental and calculated results. Finally it may also be used as a forecasting tool, in the short and long term, for the behaviour of the components in the disposal system. The EIG EURIDICE places particular importance on creating a close link between the experimental and modelling sections. The EIG EURIDICE uses the calculation code made available by the SCK•CEN allowing for modelling in saturated and unsaturated porous environments: FLAC 2D/3D (complete differences code developed by ITASCA), LAGAMINE (complete elements code developed by ULG), CODE-BRIGHT (complete elements code developed by UPC). | 
