Nuclear energy is the energy that is released during a nuclear reaction, either through fission (splitting of atomic nuclei) or fusion (combining of atomic nuclei). This energy can be used to generate electricity, power ships and submarines, and for other industrial purposes.
Nuclear energy is produced through nuclear reactions. In nuclear fission, the nucleus of an atom is split into two smaller nuclei, releasing a large amount of energy. In nuclear fusion, two atomic nuclei combine to form a larger nucleus, releasing energy in the process.