SAFETY ANALYSIS OF ITER EDA DESIGN BY GEMSAFE

General Methodology of Safety Analysis and Evaluation for Fusion Syste ms (GEMSAFE) was applied to the International Thermonuclear Experiment al Reactor (ITER) design in the stage of Engineering Design Activities (EDA) to identify Design Basis Events (DBEs) and the related safety f eatures, which were compared with those of the ITER design in the stag e of Conceptual Design Activities (CDA). As a result, 18 DBEs for the EDA design were selected in comparison with 25 DBEs for the CDA design . DBEs related to the fuel area were categorized in higher event categ ory than those of the CDA design due to the increase of the mobile tri tium contained in some components. It was necessary to reduce the inve ntory of the tritium absorbed in the tokamak dust in the EDA design as well as in the CDA design. Some measures were recommended to reduce m obile tritium dissolved in the coolant in the single cooling loop due to the increase of this estimated inventory.