
Scientists at the Idaho National Laboratory have completed a rare overhaul of one of the world’s most powerful nuclear test reactors and normal operations are expected to resume later this spring, officials said Monday.
The 11-month outage at the U.S. Department of Energy's Advanced Test Reactor, or ATR, in eastern Idaho allowed a core overhaul that's done, on average, about every 10 years. The changeout was the sixth since the reactor started operating in 1967 and the first in 17 years.