High-Volume: Repository - Basis for Use

• Basis for use
• DUO₂ in or near cask should be a geochemical barrier
• Establish reducing conditions
• Inhibit spent fuel dissolution
• Keep radionuclides in less soluble oxidation state
• Reaction products should expand to seal water ingress
• Saturate incoming water with uranium to inhibit spent fuel dissolution
• DUO₂ inside cask reduces radiation at waste package surface
• Fewer radiation-induced reactions such as radiolysis
• Lower dose if movement or recovery is needed