Nuclear Regulatory Commission requires changes at 31 plants . NRC wants enhancements to help contain damage from any accident . Reactors are similar in design to Fukushima plant in Japan . `` Strengthened vents will help these plants continue to protect the public and the environment even if emergency systems ca n't immediately stop an accident , '' NRC Chairman Allison Macfarlane said in a statement . ` Comment: The reactors were designed and built by the same company, Westinghouse Electric Company ( WEC).
Nuclear Regulatory Commission requires changes at 31 plants . NRC wants enhancements to help contain damage from any accident . Reactors are similar in design to Fukushima plant in Japan . Comment: The reactors were designed and built by the same company, Westinghouse Electric Company ( WEC).