b'1967 1968 2000Advanced Test Reactor Semiscale Blowdown Tests Multi-Application Small LightATR first reached criticality on July 2, 1967,Blowdown tests and computer analysisWater Reactorand reached its full 250-megawatt powerof the simulated accidents led to theThe seed of NuScales eventual small level in August 1969, becoming the largestformulation of computer codes thatmodular reactor was this 45-megawatt test reactor in the world.could predict the performance of backupunit capable of generating electricity cooling systems during a loss-of-coolantbut also adaptable for process heat accident. applications such as water desalination or 1966 district heating. Reactor Excursion and 1969Leak Analysis Program Zero Power Physics Reactor 1986Idaho scientists began developing reactorThe ZPPR was a low-power physicsIntegral Fast Reactorsafety analysis software to model reactorreactor that provided physics data for anyDemonstrationcoolant and core behavior in a pressurizedtype of fast neutron spectrum reactor.IFR fuel was successfully tested in EBR-II. water reactor.When operators simulated failures that caused meltdowns at Chernobyl and Three Mile Island, 1972 the reactor shut itself down safely. Power Burst Facility ReactorThe PBF was part of reactor safety testing that started with the SPERT program.1966 1973EBR-I Becomes NationalLoss of Fluid Test Facility 1975Historic Landmark The LOFT reactor was a critical resource in EBR-I was dedicated as a National the safety testing program for commercialHot Fuel Examination FacilityHistoric Landmark on Aug. 26, 1966.power reactors.The flagship facility for conductingpost-irradiation examination of fuelsand materials began operations.'