1951 Only two years after the U.S. Atomic Energy Commission selected Idaho as the location of the National ReactorTesting Station (now Idaho National Laboratory), engineers at Idaho’s Experimental Breeder Reactor-I (EBR-I) achieved one of the century’s most significant accomplishments. For the first time anywhere in the world, a usable amount of electricity was generated from nuclear fission. EBR-I later demonstrated that a“breeder”reactor can produce more fuel than it consumes. 1953 The USSNautilus prototype reactor started its initial power run at the Naval Reactors Facility, giving birth to America’s nuclear Navy.The prototype proved that atomic propulsion of ships is feasible. Prototypes of other Navy power systems were constructed later. 1955 BORAX III, a boiling water reactor, temporarily provided electricity to Arco, Idaho, making it the first community in the world to be powered by nuclear- generated electricity. More broadly, the BORAX experiments opened the door for commercialization of the boiling water reactor. 1963 High-level liquid radioactive waste from used nuclear fuel reprocessing was converted into a safe, dry granular form at a production scale for the first time in the nation at Idaho’sWaste Calcining Facility. 1976 The world’s first Loss-of-Fluid-Test (LOFT) reactor opened, repeatedly simulating loss of coolant accidents that might occur in commercial nuclear power plants. Many safety designs in reactors around the world are based on these tests. LOFT experiments helped accident recovery efforts after the Three Mile Island accident in 1979. 1966 In response to an NRC need for reactor safety analysis software, Idaho scientists began developing the Reactor Excursion and Leak Analysis Program (RELAP) to model reactor coolant and core behavior in a pressurized water reactor. 1964 Experimental Breeder Reactor-II and the co-located Fuel Conditioning Facility proved the concept of fuel recycling.