Countries With Nuclear Submarines United States Some of the countries with nuclear submarines are the United Kingdom, Russia, India, United States, China, and France. The development in the nuclear sectors has enabled a lot of countries to build nuclear-powered submarines to defend their borders. Nuclear reactors run for years without the need for refueling like diesel-powered submarines. Nuclear submarines are more powerful than diesel-powered submarines because nuclear reactors power them.

The military capability of countries all over the world has grown from small naval ships to now nuclear-powered submarines which stay under the water for several weeks or even months. Countries With Nuclear Submarines Nuclear-powered submarines can stay underwater for several weeks or even months.