by John Sullivan, Special to ProPublica June 9, 2011, 10:20 a.m.
Officials at Fort Calhoun plant in Omaha, Neb., said the situation at their plant came nowhere near to Japan's Fukushima Daiichi plant, where uncooled spent fuel released radiation.
With nuclear safety concerns in the forefront as Japan works to stave off a meltdown, here's a look at some potential vulnerabilties when what can go wrong does go wrong.