Uranium Process,Koverax & Recycle. Completely Self Regulating.
Have your raw uranium come in on the right belt, Iron plate in from the top. The Koverax and enrichment will stop automaticaly when full. Have your bots take the good cells to the reactor's and bring the depleted ones back to the recycler there at the top.
Only thing that could possibly go wrong is that your 238 Completely fills and the Processing stops, then u fill all the way up on depleted cells. But that would take a incredible amount of time.