I did’nt know myself. And Fermi 2 is 25 miles away from me!
I found this searching....
http://www.freerepublic.com/focus/f-news/1935118/posts
The last US nuclear power unit that became operational in the US was the Watts Bar 1 nuclear reactor is located between Chattanooga and Knoxville, operated by TVA. It became operational in 1996.
http://www.eia.doe.gov/cneaf/nuclear/page/at_a_glance/reactors/wattsbar.html
http://www.tva.gov/power/nuclear/nuclear_fact_sheet.pdf