How much overlap is there between isotope separation technology? The article mentions using centrifuges to separate silicon-28 from -29. Could the same equipmen

How much overlap is there between isotope separation technology? The article mentions using centrifuges to separate silicon-28 from -29. Could the same equipment be used to separate uranium-235 from -238? Is this a question of difficulty? Of scale? Or does Intel become a nuclear proliferation risk?