Design of a 150-miniature detectors 3D core-mapping system for the CROCUS reactor Fanny Vitullo, Vincent Lamirand, Klemen Ambrožič, Laurent Braun, Daniel Godat, Pavel Frajtag and Andreas Pautz EPJ Web Conf., 253 (2021) 04023 Published online: 19 November 2021 DOI: 10.1051/epjconf/202125304023