The Convair Model 23 was a 1950s design for an American nuclear-powered seaplane for the United States Navy.
Like the Air Force's WS-125, the Model 23 never left the drawing board due to risks posed by operations of nuclear-powered aircraft.
The USAAF/USAF began investigating nuclear power for warplanes in 1946 with NEPA and the ANP.
However, the Navy entered the nuclear-powered aircraft field in May 1953, awarding contracts to Convair-San Diego and Martin to explore the feasibility of a nuclear-propelled seaplane.
By early 1955, operational requirements and engineering contracts for a nuclear-powered seaplane had been awarded to the manufacturers.