Philippe Leroy¹, Matthias Bücker², Johannes Lützenkirchen³, Aida Lorena Mendieta⁴, Damien Jougnot⁴ and Alexis Maineult⁴, (1)French Geological Survey, Water, Environment and Ecotechnologies department, Orleans, France, (2)Braunschweig Technical University, Institute for Geophysics and Extraterrestrial Physics, Braunschweig, Germany, (3)Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal, Karlsruhe, Germany, (4)Sorbonne University, UMR 7619 METIS, Paris, France