Imaging with muon tomography for nuclear energy applications

Since the beginning of their activities in 2015, the muography group of the Institute for Research on the Fundamental Laws of the Universe (IRFU-CEA-France) has been continuously evolving their muon telescopes (based on micromegas detectors) as well as their analysis methods. This allowed the performance of different experiments, going from civil engineering to archaeology, including the nuclear domain. It is on this last topic that activities have been more focused in the last years. Among them, the surveillance of nuclear reactors before its dismantling or the characterisation of nuclear waste containers stand up. A summary of IRFU’s muography activities related to nuclear domain is presented here. This includes the characterisation of a nuclear reactor before its dismantling, for which a validation of the inner structure with respect to the existing models has been done as well as the first 3D muon tomography ever made for such a big object.