Fission reactors, also known as nuclear reactors, produce energy by splitting atoms of uranium or plutonium through a process called nuclear fission. Synonyms for fission reactors include nuclear power plants, atomic reactors, nuclear facilities, atomic power stations, and nuclear power stations. Fission reactors generate electricity by using nuclear fuel to heat water, creating steam that drives turbines to generate electrical power. The process of nuclear fission produces heat and radiation that must be carefully managed by safety systems and qualified personnel. Despite their controversial nature, fission reactors remain a vital source of electricity production worldwide due to their efficiency and reliability.