In the context of the European programs for the future fusion reactors, the Process Chemistry Department of ENEA, Casaccia Center (Rome), has been involved in preparing ceramic blanket materials as tritium breeders; a special consideration has been addressed to the nuclear characterization of LiAlO2 and Li2ZrO3. In this paper are reported: (a) neutron irradiation of ceramic specimens in TRIGA reactor and gamma-spectrometric measurements for INAA purposes, and (b) isothermal annealing of the irradiated samples and tritium extraction, by using an "out of pile" system.