S1W reactor

The S1W reactor is a type of research reactor that was specifically designed for the U.S. Navy's development of nuclear propulsion for submarines and other naval vessels. It was part of a series of reactors utilizing light water as both a moderator and coolant. The S1W reactor was notable for its role in the early experimentation and testing of nuclear propulsion systems, particularly for the Nautilus, the world's first operational nuclear-powered submarine.