Fission product iodine basis accident

Most fission products (including cesium and iodine) and all actinides escaping the solid AHTR fuel are soluble in the molten salt and will remain in the molten salt at very high temperatures. Fluoride salts were chosen for the liquid-fueled molten-salt reactor because actinides and fission products dissolve in the molten salt at very high temperatures. This same characteristic applies to the AHTR and provides the reactor with a second, independent beyond-design-basis-accident mitigation system to prevent radionuclide release to the environment. 

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