AbstractA safety analysis for the FER has been carried out along the framework of the GEMSAFE. First, the safety characteristics of the FER were investigated so that the RI and energy sources were identified and the General Descriptive Model (GDM) was defined to be consistent with the conceptual design of the FER. Second, the radioactive materials and the boundaries of subsystems were classified based on the definition of the proposed event categorization. Finally the Function-Based Safety Analysis (FBSA) has been performed to select 19 Design Basis Events (DBEs), i.e., seven Category-1 events, eight Category-2 events and four Category-3 events. These DBEs not only elucidate the safety requirements to be satisfied with the event categorization, but also suggest crucial items for the safety evaluation of the FER. It is noted that, for establishing the rational safety assurance for the FER, future studies should be performed upon (1) spectra of event propagations which may occur following plasma disruption and coolant inleakage into the vacuum area, and (2) technological feasibility of safety features which can prevent or mitigate these event propagations.