Throium: What about the continuous reprocessing of liquid core thorium reactors? No one wants to shut down a Thorium reactor and take out the core (U-233 is amazingly nasty stuff) so all the ones I've seen are molten salt reactors that use a liquid core and they syphon off some, reprocess it and re-inject it in a continuous loop. Maybe an upgrade? Edit: That'll teach me to reply before finishing reading the thread.