And my comment was about what happens if one of the proposed millions of megawatt reactors required for this to contribute meaningfully to decarbonisation gets

And my comment was about what happens if one of the proposed millions of megawatt reactors required for this to contribute meaningfully to decarbonisation gets under the control of someone powerful with motives to become a nuclear threat. If you can run it on thorium and U233, then it's much easier to run on U238 and Pu. Also you wouldn't need 'heaps' of depleted uranium, just the number of depleted uranium bullets lodged in the wall in the average afghani kindergarten