Constellation Energy Corp., the owner of New York’s nuclear power plants, announced today that it has filed applications to extend the operating licenses of the Nine Mile Point Unit 1 and R.E. Ginna reactors until 2049. They are the two oldest operating nuclear plants in the United States. Nine Mile 1, in Oswego County, began commercial operation in 1969. Ginna, in Wayne County, followed a few months later in 1970.