The Failed Fuel Mockup (FFM) is an electrically heated, air-cooled sodium test facility in which a wide variety of out-of-pile testing can be performed with electric cartridge heaters that simulate the fuel pins in a portion of a liquid-metal fast breeder reactor (IMFBR) fuel assembly. In experiments carried out in the FFM, the behavior of the simulated partial subassembly under blockage and other test conditions of LMFBR interest can be studied, and information on thermal and hydraulic characteristics of various subassembly configurations may be obtained.nThe test section, which contains the electric heaters, is designed for 100 psi at 1300℉ . The FFM can supply 442 kW of power to the test section, which consists initially of 19 electric cartridge heaters. The test section is conveniently removable from the facility to change the type or location of the flow blockage and also the configuration of the test section or instrumentation.
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