Intra model of ITER-FEAT and accident analysis for GSSR

A number of analyses and calculations of ITER reference accident sequences in the first wall (FW) and divertor coolant systems of the 1998 ITER design have previously been carried out for the Non Site Specific Safety Report (NSSR) of the 1998 ITER design. Model updates with new calculations are now ongoing to comply with the new ITER-FEAT design and provide input to the Generic Site Safety Report (GSSR). A wet containment bypass calculation has been performed assuming an in-vessel small pipe break on a FW cooling loop. The result is a smooth scenario with no high over-pressures and in the long run slow system heat loss causing a continuous pressure decrease.