There are nuclear power plants in the states..but I honestly don't know how many or exactly where they all are. The one I know of sure is Three Mile Island.
There are 104 nuclear power plants in the U.S., providing 19.6% of our power needs. Of those, only two are in California. Interestingly, ground has not been broken for a new reactor in the U.S. since 1974 due to government restrictions and public sentiment.