The company I work for actually built a salt-cooled reactor as an experiment back in the ‘60s. It’s still there, near Winslow, Arkansas. It only ran once, just to see what would happen; then they shut it down, foisted it off on the University of Arkansas, and washed their hands of the whole matter!
Before she was tossed out on her fat a** by the voters of my fair state, our (thankfully) former U.S. Senator Blanche (Blank) Lincoln managed to secure some federal dollars for the site to be cleaned up.
Near Winslow? Is it still there?