Core reactors are the heart of nuclear power plants. These reactors use nuclear fission to create heat that is then used to generate electricity. There are several synonyms that can be used to refer to core reactors. One common term is nuclear reactors. Other phrases that can be used to refer to core reactors include atomic reactors, nuclear power stations, and nuclear generators. These terms all describe the same thing: a complex system of machinery and equipment that generates electricity by harnessing the power of nuclear reactions. Despite the different names used to describe core reactors, their function and purpose remains the same.