France – Research and experimental development services – Développement d’une méthode de projection d’argile destinée au remplissage des zones de dépose de revêtement dans les ouvrages de scellement de Cigéo

The contract concerns the study, development and validation of an innovative clay projection solution for filling the deposition zones of the sealing works of the horizontal galleries of Cigéo (French Centre for the geological disposal of radioactive waste). It aims to define a material formulation and a projection process that ensure the stability and durability of the filling in contact with the host rock of the Callovo-Oxfordian (Cox). The optimisation of this solution will be carried out through tests conducted at different scales, from the surface laboratory to the underground laboratory of the Centre de Meuse et Haute Marne of the Andra.