Re: ... use up the waste plutonium ...
"Yes, but that applies to Plutonium-238, not the Plutonium-239 isotope that is much more commonly produced in reactors. The common Pu-239 is good for bombs and power plants, but its half-life is too long (and thus heat output too low) for NASA's favored radioscopic thermal generators."
On the other hand, the thorium MSR cycle produces LOTS of Pu239 (which is left in the system to cook down, or extracted for things like RTGs). Any Pu239 component makes plutonium almost useless for bomb making. (Yes, there's lot of U233 and you can make a bomb out of U233, but there are a bunch of other isotopes in there which have the same effect as trying to make a Pu bomb, and anyone who sucessfully extracted "general salts" then tried to make a dirty bomb out of it would probably be dead from the fierce gamma emissions long before they got as far out as the boundary fence.
Yes, LFTRs are fiercely radioactive. This is a good thing. It keeps bad guys at bay.
Biting the hand that feeds IT
