 Rickover's work with the AEC led to the development of the Pressurized Water Reactor (PWR), the first naval model of which was installed in the submarine .This made the boat capable of operating under water full-time – demonstrating this ability by reaching the North Pole and surfacing through the Polar ice cap.From the successful naval reactor program, plans were quickly developed for the use of reactors to generate steam to drive turbines turning generators.