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Fluorapatite, fluorinated calcium phosphate, has been identified as a potential matrix for the entombment of the zirconium fluoride fission product waste stream from the proposed FLEX process. If the efficacy of fluorapatite based waste-storage can be demonstrated, then new and potentially more-efficient options for handling and separating high-level wastes, based on fluoride-salt extraction, will become feasible. This proposal is for renewal of the UNLV portion of a dual-path research project to develop a process to fabricate a synthetic fluorapatite waste form for the ZrF4, FP waste stream, characterize the waste form, examine its performance under environmental conditions, and correlate the behavior of the waste form with natural analogs. At UNLV, characterization of the material will be accomplished by probing molecular-scale electronic and geometric structure of the materials in order to relate them to macroscopic properties, with the goal of developing techniques to evaluate and predict the performances of different waste-form materials. Time and funding permitting, other waste forms for the zirconium fluoride, fission product salt waste stream will be examined and benchmarked against the fluorapatite matrix baseline.
Calcium phosphate; Fluorides; Fluorination; Radioactive wastes — Storage; Separation (Technology); Zirconium compounds
Radioactive wastes--Storage; Separation (Technology); Zirconium compounds
Chemistry | Oil, Gas, and Energy | Physical Chemistry
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Lindle, D. W.,
Perry, D. L.
Evaluation of Fluorapatite as a Waste-Form Material.
Available at: https://digitalscholarship.unlv.edu/hrc_trp_separations/51