Sorry Joe, a lot of nuclear power units were started after Three Mile Island Incident.
http://www.eia.doe.gov/cneaf/nuclear/page/nuc_reactors/operational.xls
Even Watts Bar started construction prior to that date.
Many existing facilities have been refit, or their construction completed and come on line since then, but no construction sites are listed in the DOE spreadsheet after TMI (1979).
Note, too, the lag between construction starts and going on line. If we started tomorrow, it would take years for the first watt of electricity to come out of any new plant.