Across America are more than 30 NPP - Nuclear Power Plants, that are under threat due to large reservoirs of water sitting upstream of the sites. These reservoirs are held up by aging dams, dams that could fail due to age and/or earthquakes.
Remember it is claimed that Fukushima NPP, in Japan, failed due in part to a flood of water which disabled most of the backup systems meant to keep the reactors and spent fuel polls from blowing sky-high like they did in the days after march, 11, 2011. And those reactors are still releasing to the atmosphere.
http://www.opednews.com/articles/An-American-Fukushima-Poss-by-William-Boardman-121126-403.html
And another article about Fukushima
http://www.opednews.com/articles/Nuclear-Perceptions-Fight-by-William-Boardman-121022-931.html