The designed age for nuclear reactors in the U.S. is 40 years. The average age of the 104 working plants is 32 years, according to the Energy Information Administration (EIA), a part of the Department of Energy. With age is sure to come more maintenance and outages. Aging power plants are being re-fitted with new safety and maintenance procedures springing from NRC analysis of the Fukushima Daiichi nuclear power plant damage in Japan caused by the tsunami. Under a phased schedule, NRC is requiring new safety additions for 31 U.S. reactors that are similar in design to the three Japanese reactors that suffered a meltdown and released radioactive materials following the tsunami without causing any deaths in the population.