Activating Uranium Dioxide

Bard, R.J.; Bertino, J.P.; Bunker, Don L.

doi:10.1021/ie50624a030

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…The first of these was studied at LASL by BARD, et al [9], and at ORGDP by ORRICK and others [10]. It was not put into production because it was determined that the savings due to changes in reactor sizing and increased conversion to uranium tetrafluoride did not justify the increased costs and operating complications due to the extra steps needed for this activation process as compared to the simpler method of adding sulfate in the denitration process.…”

Section: Reduction Of Uranium Trioxide To Uranium Dioxidementioning

confidence: 99%

Conversion of Uranium Trioxide to Uranium Hexafluoride

Pashley¹

1978

Radiochimica Acta

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Í70 3 / UF6 / Fuel cycle / U02 / UFt Summary Processes for conversion of U03 to UF6 for use in the isotopie enrichment part of the fuel cycle have been operated on a tons/day scale for decades. Thé basic route which involves reduction of U03 to U02 with Hj, followed by conversion to UF4 with HF, and then fluorination with elemental F2 to give UF6, is described with discussion of some of the key technology points. Limited comments on methods of purification of the UF, and on alternative conversion routes are presented.

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Section: Reduction Of Uranium Trioxide To Uranium Dioxidementioning

confidence: 99%

Conversion of Uranium Trioxide to Uranium Hexafluoride

Pashley¹

1978

Radiochimica Acta

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Mechanism of reactivity enhancement of thermal denitration route uranium oxide by employing reduction-oxidation–reduction cycle

Kumar

Gupta

Keskar

et al. 2022

Journal of Nuclear Materials

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Fluoride Interference Films on Uranium Dioxide. II. Kinetics of the Hydrofluorination Reaction

Ellis

Roberts

1963

The Journal of Chemical Physics

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In the temperature interval 200°—300°C optically isotropic uniformly colored interference films are formed on the flat, polished surfaces of fused uranium dioxide by reaction with anhydrous gaseous hydrogen fluoride. The kinetics were determined spectrophotometrically at eight temperatures for film thicknesses up to ¼ micron. In the pressure interval 20–53 cm Hg, the rate of film growth is diffusion controlled with the thickness proportional to the square root of both pressure of HF(g) and time. The proportionality constant is β=β0exp(−Q/RT)Å/(sec×cm Hg)12 in which β0=2.59×103 and Q=6930 cal/mole with a 90% confidence interval of ±140 cal/mole. From metallographic examinations it was concluded that the uranium tetrafluoride product is deposited at the film—UO2(s) interface.

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Activating Uranium Dioxide

Cited by 4 publications

References 2 publications

Conversion of Uranium Trioxide to Uranium Hexafluoride

Conversion of Uranium Trioxide to Uranium Hexafluoride

Mechanism of reactivity enhancement of thermal denitration route uranium oxide by employing reduction-oxidation–reduction cycle

Fluoride Interference Films on Uranium Dioxide. II. Kinetics of the Hydrofluorination Reaction

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