Kinetics of tritium release from irradiated Li2TiO3 pebbles in out-of-pile TPD tests

The rate of tritium release from Li2TiO3 pebbles was examined by post irradiation thermal desorption spectroscopy (the Temperature Programmed Desorption (TPD) method). Pre-treatments before and even after irradiation were found useful to gain insight on the behavior of these pebbles at different temperatures, as good spectrum de-convolution is achieved and kinetic parameters for the rate determining pseudo-first-order steps can be estimated. We show the results concerning Li2TiO3 pebbles bed specimens developed in the frame of the European fusion technology program.