NRC Orders Owners of 31 U.S. Reactors to Toughen Vents
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Owners of almost a third of all U.S. nuclear reactors, including Exelon Corp. and Entergy Corp., were ordered to upgrade the units in the next four years to guard against pressure-induced explosions.
The Nuclear Regulatory Commission directed that operators of the 31 units, among the oldest of 104 U.S. reactors, overhaul vent systems to prevent a build-up of hydrogen and limit the rise of temperatures in containment buildings, according to a statement. The NRC’s decision adds to a 2012 order and makes fixes to the units potentially more expensive.