The PLA navy has more than 225,000 personnel and is thought to have as many as 70 submarines, 10 of them nuclear-powered
230
nearly 155
Reactors power submarines and many surface ships. Nuclear weapons.
Most submarines now have a single nuclear reactor. Some smaller, coastal submarines have a single diesel.
From Wikipedia: Today, six countries deploy some form of nuclear-powered strategic submarines: the United States, Russia, France, the United Kingdom, People's Republic of China, and India Several other countries, including Argentina and Brazil, have ongoing projects in different phases to build nuclear-powered submarines.
Nuclear energy is not gathered or created. There is a saying to go along with this: Energy cannot be created or destroyed, only changed in form. That saying is called the Law of the Conservation of Energy. Nuclear is a type of potential energy so this concept applies to it. There are many ways nuclear energy can be used. Lets say submarines. Most people have heard of the nuclear powered submarines. They can stay under water for a long time because they have basically unlimited energy. The submarines are powered by a nuclear reactor causing a series of nuclear reactions. The submarine uses the nuclear reactions as power. Generally it will get converted to mechanical or electrical energy (both types of Kinetic energy).
Nuclear power plants are very large fixed installations on land. There are many reactors however in the US navy ships and submarines
At times it sure seemed like a lot more than there actually were, but counting U.S. NATO, and Soviet submarines, around 300. That includes both attack and missile submarines, DE and Nuclear.
As of end of 2010, the Russian Navy included 12 strategic submarines of four different types. The submarines can carry 160 sea-launched ballistic missiles (SLBMs) that can carry 576 nuclear warheads.
Libya has 100 aircraft carrier, 300 destroyer and 50 nuclear powered submarines..
The Royal Navy Operates 6 Trafalgar class submarines and 1 Astute class. These submarines are called 'attack' or 'hunter-killer' submarines and have roles such as land attack using Tomahawk cruise missiles and anti-surface and anti-submarine roles using the Spearfish torpedo. They can also carry out surveillance and reconnaissanse. The Royal Navy also has 4 Vanguard class submarines. These submarines are ballistic missile submarines. These submarines are responsible for the UK's nuclear detterent and use the Trident missile system. There is always at least one of these boats at sea at any given time.