On the comparison of uranium isotopes behavior in polycrase and betafite as natural analogues of actinides

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عنوان دوره: اولین دوره بین المللی و بیست و هشتمین دوره ملی (1400)
Knowing the behavior of uranium isotopes in metamict minerals carries predictive information about the state of solidified forms of HLW and the behavior of radionuclides under conditions of geological disposal. This work deals with the behavior of uranium isotopes in polycrase. Radiochemical and alpha-spectrometric analyzes show that the 238U in the metamict structure of polycrase preserves stronger binding with the mineral than its daughter product (234U) does, and unlike betafite, 32 percent of uranium atoms preserve the initial valence state, U(IV) in polycrase. It is the authors’ opinion that the results of our research demonstrate the need for more extensive studies of solidified waste forms based on polycrase for immobilization of actinides.
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