Ordo can you look at uran rod recipe - it takes uran 235 but its removed from oregen so only way to get it is from centrifuge normal uran at 20% to get a tiny. That means you need way too much uran just to make 1 quad fuel rod - you need multiple veins just to get a reactor running for 2 hours with like 300 eu.
This way its so much easier just to spam farms and boilers instead of actually using the next tier of energy - if you can call it that - nuclear aint usable in this state.
1 stack of U238 Ore -> Macerator -> 2 stacks of crushed U238 ore -> Thermal centrifuge -> 2 stacks of tiny U235 -> ~40 fuel rods.