I mean to say that making clean U-233 (with very little U-232 and daughters) is easy. Certainly assembling a bomb given pristene weapons material is particularl

I mean to say that making clean U-233 (with very little U-232 and daughters) is easy. Certainly assembling a bomb given pristene weapons material is particularly easy. I'm a reactor designer and study this kind of thing. It's really just a question of how fast you move your Th-232 through a neutron cloud. If you move it relatively quickly and then do your Pa separation you can get very nice U-233 from Thorium. The nice thing here about low-pressure fluid fuel reactors is that you can move material in and out fairly readily.