IFK Berlin, Institute for Solid-State Nuclear Physics Berlin, Institut fuer Festkoerper-Kernphysik Berlin: The Dual Fluid Reactor, DFR, is a novel nuclear reactor concept based on the Generation IV Molten-Salt Reactor (MSR) concept and the liquid-metal cooled reactors (SFR, LFR) with the major improvement that the molten-salt fuel is not used as coolant but the heat is removed in a separate liquid-lead loop.