2 lines of centrifuges to process uran ore, plus the addition of the kovarex enrichment. Upper line is uran ore input and bottom is a 2 lane input of uran-235 and uran-238(see screenshot).
The kovarex centrifuges balance themself at 200 uranium-235 (80 per each centrifuge and 40 in the middle chest as refill bufffer) and will output the 1 uranium-235 produced.
The kovarex design is from @kathrineofsky. Thank you for the video on the nuclear power ratios!