Intersubassembly Fuel Penetration into a Failed Primary Control Subassembly in an LMFBR

摘要

Early fuel removal from the active core of a liquid-metal-cooled fast breeder reactor (LMFBR) undergoing a core-disruptive accident may reduce the potential for large energetics resulting from recriticalities. A possible avenue for early fuel removal in heterogeneous-core LMFBRs is molten fuel and steel penetration into control subassemblies. This possibility was analyzed with the two-dimensional SIMMER-II code for two cases involving initial low- and high-pressure states in the disrupted core. In both cases the calculations indicated the potential for considerable fuel mass reduction in the active core. (ERA citation 09:013942)