Nuclear energy primarily generates electricity, serving as an alternative to fossil fuels for both domestic and industrial applications. While the discussion emphasizes electricity production, it also highlights other uses, such as generating steam for industrial processes and producing isotopes for medical applications. Additionally, nuclear energy contributes to the functionality of smoke detectors and other devices that rely on ionization. The conversation reflects a broader inquiry into the potential industrial applications of nuclear energy beyond electricity generation. Overall, nuclear energy has diverse uses, though electricity remains its most significant output.