The term 'Producer of Nuclear Power' can be summarized as a REACTOR, which is a seven-letter word. A REACTOR is a device used to initiate and control a sustained nuclear chain reaction. Reactors are used in nuclear power plants to generate electricity, as well as in nuclear submarines and research facilities. Reactors are designed to maintain a controlled rate of fission, which releases energy in the form of heat. This heat is then used to produce steam, which is used to turn turbines and generate electricity.