The C1W reactor is a nuclear reactor used by the United States Navy to provide electricity generation and propulsion on warships. C1W reactors, like all United States Naval reactors, are pressurized water reactors. The C1W designation stands for: * C = Cruiser platform * 1 = First generation core designed by the contractor * W = Westinghouse was the contracted designer The USS Long Beach (CGN-9), commissioned September 1961, was decommissioned May 1995.