Full scale 3D-modelling of the coupled gas migration and heat dissipation in a planned repository for radioactive waste in the Callovo-Oxfordian clay

► Modelling of gas migration and heat dissipation in repository for radioactive waste. ► Meshing approach: Subdivision - Multiplication - Connection. ► Finite volume code: TOUGH2-MP, EOS5. ► Two-phase (gas, liquid), advective/diffusive transport of water and hydrogen. ► Efficient method for large scale modelling considering small scale structures.