Abstract
A tritium transport model called BETTY has been developed to describe and predict the kinetics of T transport in beryllium in fusion blanket applications. The model incorporates surface processes and trapping in helium bubbles, in addition to bulk diffusion. A comparison of the results available for irradiated Be samples from the T release experiments SIBELIUS with those predicted by the model show reasonable agreement. In addition, a parametric sensitivity analysis for the variation of surface activation energies and diffusion coefficient is performed and the results of the analysis are presented and discussed.