[Pollard]

I don’t know much about nuclear power but I do know that every nuclear power plant is built next to a large body of water which is necessary to cool the reactors. Does nuclear power need oxygen?

[Larry Lucido]

https://www.quora.com/If-we-send-a-nuclear-reactor-probe-into-space-could-we-use-space-itself-as-a-cooling-source

[PIF]

These will be used in one of the coldest environments known - dark areas of the Moon which reach -250C/-410F) - is that cold enough to cool a nuclear reactor for you? No need for oxygen

Didn’t you cover this in HS?