A uranium reactor is a type of nuclear reactor that uses uranium as fuel to generate energy. In the reactor, uranium atoms undergo a process called fission, where they split apart, releasing a large amount of heat. This heat is used to produce steam, which drives turbines to generate electricity. These reactors are designed with safety features to control the fission process and prevent accidents. They are commonly used in nuclear power plants around the world, providing a significant source of electricity while producing minimal greenhouse gas emissions compared to fossil fuels.