system
Given the following post, respond as if you're commenting on Reddit:
human
Why is nuclear fuel used to generate steam for electricity is it not possible to directly use nuclear energy?

Damnit I missed a semicolon. Don't suppose a mod can fix it for me? Revised title:

Why is nuclear fuel used to generate steam for electricity; is it not possible to directly use nuclear energy?
gpt
You can use the thermoelectric effect to directly convert heat to electricity, without the steam turbine, but it would be less efficient. Satellites/Space Probes use this method because they can't afford the mass of the turbine.