Yep....”weapons grade” for that element is U232. Army fooled around with it for a while in the early 50’s. I think they did a few tests out in Nevada. Just didn’t work out.
U232 is a gamma emitter which required too many modifications and shielding....tended to screw up the bomb’s internal circuits and was too toxic to deal with.
In a LFTR reactor, U232 is screened out in the reactor’s waste separators (along with other waste materials). It’s then stored at a shielded waste center. As a side benefit, many of the waste materials can reprocessed into other items such as medical isotopes.
Could it be re-used as well as the “trigger” fuel for a thorium reactor?
U233 is the fuel.