What device is used to generate electricity from a controlled nuclear fission chain reaction?

A nuclear reactor is the device designed to generate electricity from a controlled nuclear fission chain reaction. Within a nuclear reactor, atomic nuclei are split in a process known as fission, which releases a considerable amount of energy in the form of heat. This heat is used to produce steam from water, and the steam drives turbines connected to generators, ultimately converting the energy released during fission into electrical energy.

In contrast, solar panels convert sunlight directly into electricity using photovoltaic cells, wind turbines harness the kinetic energy of wind to produce electricity, and geothermal plants utilize heat from the Earth's interior to generate power. Each of these alternatives operates on different principles and energy sources than a nuclear reactor, which specifically focuses on nuclear fission to produce energy.