Nuclear Chemical Effects in the Paragenetic Mineral Association Based on Polycrase

Khanmiri, Mohammad Hosseinpour; Bogdanov, R.V.

doi:10.1134/s1066362218010137

Cited by 4 publications

(1 citation statement)

References 33 publications

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“…The immobilization of high-level radioactive waste (HLW) materials is thought to be the most important step in the final phase of radioactive waste management technology ( Ewing et al, 2004 ; Weber et al, 2009 ; Ojovan and Lee, 2011 ; McCloy and Goel, 2017 ; Hosseinpour Khanmiri and Bogdanov, 2018 ; Hosseinpour Khanmiri et al, 2018 ; Rahman and Saleh, 2018 ; Hyatt and Ojovan, 2019 ; Ojovan and Yudintsev, 2023 ; Hosseinpour Khanmiri et al, 2024 ). Most of the available data is related to the development of materials for the long-term storage or disposal of high-level nuclear waste materials, either from the reprocessing of spent commercial reactor fuels or from a number of defense reprocessing operations.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the leaching behavior of Na and Si in simulated HLW borosilicate glass obtained from the waste of a 1000 MWe class PWR reactor: using the response surface method

Hosseinpour Khanmiri,

Yadollahi,

Samadfam

et al. 2024

Front. Chem.

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The immobilization of high-level nuclear waste (HLW) in glass waste matrices provides the key safety function of slowing down radionuclide emissions from an underground disposal site. This study examines the leaching behavior of two major elements, Na and Si, in HLW borosilicate glass simulated from waste of a 1000 MWe class pressurized water reactor (PWR) using response surface methodology and Box-Behnken Design. The design of the experiment was carried out considering three independent variables: the pH of the solution, the contact time, and the leaching temperature, leading to 17 leaching runs performed using the static product consistency test (PCT). The results of statistical analysis (ANOVA: analysis of variance) indicated that the effects of the individual variables and the interactions between them were statistically significant, and the relative consistency of the data further confirmed the model’s applicability. Data obtained from the PCT experiments revealed that the leaching behavior of Na and Si in the evaluated waste glass exhibited similar behavior to previously researched glasses for each condition tested.

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Section: Introductionmentioning

confidence: 99%

Investigation of the leaching behavior of Na and Si in simulated HLW borosilicate glass obtained from the waste of a 1000 MWe class PWR reactor: using the response surface method

Hosseinpour Khanmiri,

Yadollahi,

Samadfam

et al. 2024

Front. Chem.

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The tendency towards equalization of the 234U/238U isotopic activity ratios in fractions of U(IV) and U(VI) during thermal annealing of metamict polycrase

Hosseinpour Khanmiri,

Bogdanov,

Titov

et al. 2024

Applied Geochemistry

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On the issue of comparing the immobilization characteristics of matrix materials based on Nb–Ta–Ti-oxides of the types AB2O6 and A2B2O7

Hosseinpour Khanmiri,

Bogdanov,

Puchkova

et al. 2024

Sci Rep

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In the study presented here, the initial (that is, before the start of the process of natural hydrochemical influence) mineral formula of metamict polycrase in the composition of granite pegmatites of the Baltic Shield, applying an uranium natural half-leaching period, was calculated. To investigate the characteristics of immobilization of actinides in the studied polycrase, the absolute and relative uranium contents are compared with the corresponding uranium contents in the original betafite of the same deposit and age. It has been shown that over its geological history, betafite has lost up to 80% of its original uranium content. The proportion of uranium preserved in polycrase is twice as high. It is concluded that the difference in the relative content of uranium (27.3 wt% in polycrase and 31.6 wt% in betafite) cannot be the only reason for the complete oxidation of uranium in betafite, given that in polycrase 30% of uranium is preserved in the tetravalent state. It is more likely that the oxidation of uranium in betafite was primarily a result of the low ionicity of the chemical bonds compared to that in polycrase. This allows us to consider minerals of the euxenite group to be quite promising as matrix materials for the immobilization of actinides. At the same time, an opinion was expressed on the advisability of further comparative studies of Nb-Ta-Ti-oxides of the mineral groups AB 2 O 6 and A 2 B 2 O 7 for their use at the final stage of the nuclear fuel cycle. Keywords Isolation of actinides, Mineral-like matrices, Minerals of the euxenite and pyrochlore groups, Hydrochemical weathering processes, Uranium half-leaching period, Initial elemental composition of the mineral

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Nuclear Chemical Effects in the Paragenetic Mineral Association Based on Polycrase

Cited by 4 publications

References 33 publications

Investigation of the leaching behavior of Na and Si in simulated HLW borosilicate glass obtained from the waste of a 1000 MWe class PWR reactor: using the response surface method

Investigation of the leaching behavior of Na and Si in simulated HLW borosilicate glass obtained from the waste of a 1000 MWe class PWR reactor: using the response surface method

The tendency towards equalization of the 234U/238U isotopic activity ratios in fractions of U(IV) and U(VI) during thermal annealing of metamict polycrase

On the issue of comparing the immobilization characteristics of matrix materials based on Nb–Ta–Ti-oxides of the types AB2O6 and A2B2O7

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