Flooding Brings Worries Over Two U.S. Nuclear Plants

 Much of the attention has been focused on the Fort Calhoun plant because of recent concerns about its preparedness and the dramatic images of the structures surrounded in all direction by water, as if rising out of a lake. Earlier this month, the plant briefly lost power needed to cool the spent fuel pool after a fire that remains under investigation. 

Last year, the Nuclear Regulatory Commission cited the Fort Calhoun plant for not being adequately prepared for floods and rated the safety violation in the “yellow” category, the second most serious. The agency ordered changes because it said that under the plan in place at the time, a major flood could cause core damage.

http://www.nytimes.com/2011/06/21/us/21flood.html