6h13m54s27f 1 Fluid vs 2 Fluid Th-MSR - Chemical Reprocessing Complexity - TR2016a
Channel: Thorium Remix
Date: 20/05/2017

http://ThoriumRemix.com/ So this is the classic design for the Molten-Salt Reactor that came out of the Oak Ridge effort in the 1970s. It's what we call a single fluid reactor. It is a complex chemical undertaking in order to turn one of these reactors into a thorium breeder reactor. There had been Oak Ridge studies done on what's called the 2-fluid reactor, and the 2-fluid reactor is fundamentally different in that it separates the fuel, the uranium-233 fuel, in the FLiBe salt from a blanket FLiBe salt carrying thorium-tetrafluoride.

Kirk Sorensen of Flibe Energy:
The challenge of this 2-fluid reactor design though, is the internal geometry of the reactor. The advantage though, of keeping them separate, is- The simplification that can be realized in the reprocessing step. 

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