Adaptation and security validation of an irradiator suitable for use of cesium-137 sources Rogério M.V. Silva, Walmir Belinato, William S. Santos, Danilo O. Junot, Luiza F. Souza and Divanízia N. Souza EPJ Web of Conferences, 66 (2014) 10016 Published online: 20 March 2014 DOI: 10.1051/epjconf/20146610016