ADVANCED TEST REACTOR 1 2 1970s 3 “As our nation’s leading nuclear energy research laboratory, Idaho National Lab is home to the Advanced Test Reactor—a true national treasure. For the last fifty years, the Advanced Test Reactor has ensured that nuclear power is a safe and effective source of energy, and has helped power the U.S. Navy. The dedicated research and operations personnel have been key to Advanced Test Reactor’s successes and they will continue to sustain its mission well into the future.” –Sen. James E. Risch