TRIDYN; A COMPUTER CODE FOR THE 2-D ANALYSIS OF THE HEAD AND MASS TRANSFER TRANSIENT OF A BREEDER PIN

The Computer code, TRIDYN, has been developed to study the mass and energy transient of a PIN blanket concept under pulsed load (burn/off-burn). In the model the tritium release is controlled by means of two mechanisms: diffusion within the bulk and desorption at the surface of the grain. The model includes the thermal profile evaluations in the breeder and, by taking into account the thermal transient, evaluates the tritium inventory, permeation, and purge concentration evolution.