Radiation protection study for a reloading operation of cobalt 60 sources in the Moroccan ionisation station using the GEANT4 Monte-Carlo simulation codeAdil Aknouch, Youssef El-ouardi, Mohammed Mouhib, Rajaa Sebihi and Abdelmajid ChoukriE3S Web Conf., 234 (2021) 00007DOI: https://doi.org/10.1051/e3sconf/202123400007