Preliminary Probabilistic Safety Assessment of Chinese Dual Functional Lithium Lead Test Blanket Module System for ITER

Abstract

A dual functional lithium lead (DFLL) test blanket module (TBM) concept for testing in International Thermonuclear Experimental Reactor (ITER) has been proposed. The safety assessment of DFL-TBM has been carried out applying the Probabilistic Safety Assessment (PSA) approach. The accident sequences have been modeled and quantified through the event tree technique, which allows identifying all possible combinations of success or failure of the safety systems in responding to a selection of initiating events. The identification of Potential Initiator Events is provided by the Failure Mode and Effect Analysis (FMEA) procedure. The outcome of the analysis shows that DFLL-TBM is quite safe and presents no significant hazard to the environment. In addition, a sensitivity analysis of safety systems has been performed.