I've recently stumbled upon some videos where Kirk Sorensen describes LFTR reactors (Liquid fluoride thorium reactor) that his startup is working on, and he is

I've recently stumbled upon some videos where Kirk Sorensen describes LFTR reactors (Liquid fluoride thorium reactor) that his startup is working on, and he is claiming that their reactor can cover its costs simply by selling fission products like xenon, helium, and rare radioactive elements used in medicine.