By only source I meant close to 90%. Maybe I wasn’t exact enough in my wording . I know 100% is not realistic. But at 80%-90% nuclear for electricity would free up a lot of coal for coal to oil liquefaction, and natural gas for cars. France is pretty close to 70% to 80% nuclear powered.
Today most of our uranium comes from foreign suppliers. Quintupling that demand needs a change in supply. And a gift from President Carter means we still will not reprocess our nuclear waste (like France, Japan, Russia and others) requiring an even larger supply of “new” uranium.
We don't have a lack of resources, but a lack of will to use them (or rather a lack of will to elect those who will let us).