The Catawba Nuclear Station is a nuclear power plant located on a 391-acre peninsula, called "Concord Peninsula", that reaches out into Lake Wylie, in York, South Carolina. Catawba utilizes a pair of Westinghouse four-loop pressurized water reactors. As a part of the Megatons to Megawatts Program Catawba was one of the plants that received and tested 4 fuel assemblies containing MOX fuel with the plutonium supplied from old weapons programs.