"Nuclear-powered" refers to the use of nuclear reactions to generate energy. This energy is typically harnessed through nuclear fission, where the nucleus of an atom, such as uranium, is split into smaller parts, releasing a significant amount of heat. This heat is then used to produce steam, which drives turbines to generate electricity. Nuclear power is commonly used in nuclear power plants to provide electricity to homes and industries. Additionally, it powers some naval vessels, like submarines and aircraft carriers, allowing them to operate for long periods without refueling.