No, there is a problem. But the problem is political, not economic. A uranium fuel cycle makes it relatively easy to breed plutonium or explain why you're bui

No, there is a problem. But the problem is political, not economic. A uranium fuel cycle makes it relatively easy to breed plutonium or explain why you're building enrichment plants which can be used to make weapons-grade HEU. Ergo, bombs. Ergo, proliferation-policing issues. To move the planet onto nuclear power (as a zero-carbon solution) is therefore politically unpalatable to those who enforce the current nuclear weapons oligopoly. A Thorium economy might be manageable without making proliferation too easy, if the fuel is converted to U-233 and burned in situ. (Certainly U-233 isn't used in weapons at present as far as I know ...)