Nuclear power is a form of energy generated by nuclear reactions, primarily through a process called nuclear fission. In nuclear fission, the nucleus of an atom, typically uranium-235 or plutonium-239, is split into smaller nuclei when it absorbs a neutron. This process releases a significant amount of energy in the form of heat.
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Useful power generated from nuclear energy release, usually controlled nuclear fission in a reactor supplying heat to a power cycle. Operational carbon emissions, full fuel-cycle impacts, accident risks, waste and decommissioning are distinct assessment dimensions. Replacing existing output requires comparison of both annual energy and dependable capacity.
