Saudi Arabia you read is thinking of doing it too. They won't be the only two ..
Untangling the global uranium value chain requires educated guesswork. Some databases capture uranium trade flows, but they are not sufficiently complete or detailed, when (say) ore can be mined in Kazakhstan, concentrated and enriched in Russia, made into fuel in France, made into fuel rods in Germany, then ultimately consumed in a Swiss nuclear reactor!
Nevertheless, the US imports two-thirds of its uranium, and c20-30% of its supplies still come from Russia, which equates to 4-5% of all US electricity. So, the US is not truly self-sufficient in energy.
One has to expect an increase in Western uranium enrichment, amidst adversarial relations with Russia and China. Australian-listed Silex Systems has been developing a laser-based enrichment technology at TRL6, in a 51/49 JV with Cameco called Global Laser Enrichment, working towards a 5M lbs pa facility in Kentucky.