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(PDP/2) Verification of DBEs Selected for ITER EDA 1998 Design by GEMSAFE Methodology and Consideration for Siting Events

T. Sawada¹⁾, M. Saito^1)
 
1) RLNR, Tokyo Institute of Technology, Tokyo, Japan

Abstract.  General Methodology of Safety Analysis and Evaluation for Fusion Energy Systems (GEMSAFE) has been applied to the International Thermonuclear Experimental Reactor (ITER) design in the final stage of Engineering Design Activities (EDA) to select design basis events (DBEs) and to identify related safety features and requirements to ensure its safety. We have classified DBEs into three categories considering their occurrence probabilities and expected scales of their consequences. By the GEMSAFE methodology applied to the ITER final design, we have selected 21 DBEs: 8 in the category 1, 8 in the category 2 and 5 in the category 3. The selected DBEs were compared with the Reference Events which were addressed in the ITER non-site specific safety report (NSSR-2). As a result, it has been made clear that there is no significant differences between the GEMSAFE DBEs and NSSR-2 Reference Events. Furthermore, in the framework of the GEMSAFE methodology, we have proposed a concept of siting events selection with the suggestion for siting events as those that were beyond design basis events developed by using function-based safety analysis (FBSA) method.

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