[swixmix]

For extra clarity:

> Nuclear submarines and aircraft carriers are powered by onboard nuclear reactors. Atoms in the nuclear reactor split, which releases energy as heat. This heat is used to create high-pressured steam. The steam turns propulsion turbines that provide the power to turn the propeller. Additional turbines also make electricity for the ship. As the steam cools and condenses back into water, the water is directed back through the system, and the process starts again.

https://www.epa.gov/radtown/nuclear-submarines-and-aircraft-....