Sorption Modeling and Verification for Off-Gas Treatment

This project is focused on the development of modeling tools for off-gas capture from nuclearfuel recycling facilities. Target species include iodine, krypton, xenon, tritium, and carbon dioxide. This work will engage experts in adsorption and absorption to extend capabilities to develop open-source models that address goals of the Off-Gas Sigma Team and the Safeguarded Separations (SafeSeps) element of the Nuclear Energy Advanced Modeling and Simulation (NEAMS) program. The proposed effort will extend available models and algorithms developed for gas sorption, and the results will be used to provide recommendations on a path forward for the development of sorbents and sorption processes for off-gas treatment.Literature reports of iodine adsorption based on silver-exchanged inorganic sorbents will be initially used to guide model development efforts. Relevant data also exist for adsorption of noble gases, for tritium removal by adsorption, and for carbon removal by absorption due to the widespread applicability of industrial drying and caustic scrubbing processes. Additional experimental data for a wide range of temperature and gas partial pressures will be obtained in this project to complement existing data and aid in model development and verification. Experimental efforts in this project will be coordinated with those of the Off-Gas Sigma Team of the Fuel Cycle R&D Program's Separations and Waste Forms Campaign.