U.S. orders new safety upgrades at nuclear plants

U.S. orders new safety upgrades at nuclear plants
http://www.cnn.com/2013/06/06/us/nuclear-reactors-upgrades/

"U.S. regulators are directing 31 nuclear reactors similar in design to the Fukushima Daiichi plant in Japan, where an earthquake and tsunami caused a meltdown two years ago, to take additional steps to help contain radiation and other damage from any accident that is not quickly halted."