Oxidation kinetics for conversion of U3O8 to ε-UO3 with NO2

J. A. Johnson; C. J. Rawn; B. B. Spencer; R. A. Meisner; G. D. Del Cul

doi:10.1016/j.jnucmat.2017.03.048

Oxidation kinetics for conversion of U₃O₈ to ε-UO₃ with NO₂

J. A. Johnson
, C. J. Rawn
, B. B. Spencer
, R. A. Meisner
, G. D. Del Cul

Nonproliferation Program Office

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The oxidation kinetics of U₃O₈ powder to ε-UO₃ in an NO₂ environment was measured by in situ x-ray diffraction (XRD). Experiments were performed at temperatures of 195, 210, 235, and 250 °C using a custom designed and fabricated sample isolation stage. Data were refined to quantify phase fractions using a newly proposed structure for the ε-UO₃ polymorph. The kinetics data were modeled using a shrinking core approach. A proposed two-step reaction process is presented based on the developed models.

Original language	English
Pages (from-to)	211-215
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	490
DOIs	https://doi.org/10.1016/j.jnucmat.2017.03.048
State	Published - Jul 1 2017

Keywords

Kinetics
Oxidation
Used nuclear fuel
Voloxidation

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10.1016/j.jnucmat.2017.03.048

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title = "Oxidation kinetics for conversion of U3O8 to ε-UO3 with NO2",

abstract = "The oxidation kinetics of U3O8 powder to ε-UO3 in an NO2 environment was measured by in situ x-ray diffraction (XRD). Experiments were performed at temperatures of 195, 210, 235, and 250 °C using a custom designed and fabricated sample isolation stage. Data were refined to quantify phase fractions using a newly proposed structure for the ε-UO3 polymorph. The kinetics data were modeled using a shrinking core approach. A proposed two-step reaction process is presented based on the developed models.",

keywords = "Kinetics, Oxidation, Used nuclear fuel, Voloxidation",

author = "Johnson, \{J. A.\} and Rawn, \{C. J.\} and Spencer, \{B. B.\} and Meisner, \{R. A.\} and \{Del Cul\}, \{G. D.\}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = jul,

day = "1",

doi = "10.1016/j.jnucmat.2017.03.048",

language = "English",

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journal = "Journal of Nuclear Materials",

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TY - JOUR

T1 - Oxidation kinetics for conversion of U3O8 to ε-UO3 with NO2

AU - Johnson, J. A.

AU - Rawn, C. J.

AU - Spencer, B. B.

AU - Meisner, R. A.

AU - Del Cul, G. D.

PY - 2017/7/1

Y1 - 2017/7/1

N2 - The oxidation kinetics of U3O8 powder to ε-UO3 in an NO2 environment was measured by in situ x-ray diffraction (XRD). Experiments were performed at temperatures of 195, 210, 235, and 250 °C using a custom designed and fabricated sample isolation stage. Data were refined to quantify phase fractions using a newly proposed structure for the ε-UO3 polymorph. The kinetics data were modeled using a shrinking core approach. A proposed two-step reaction process is presented based on the developed models.

AB - The oxidation kinetics of U3O8 powder to ε-UO3 in an NO2 environment was measured by in situ x-ray diffraction (XRD). Experiments were performed at temperatures of 195, 210, 235, and 250 °C using a custom designed and fabricated sample isolation stage. Data were refined to quantify phase fractions using a newly proposed structure for the ε-UO3 polymorph. The kinetics data were modeled using a shrinking core approach. A proposed two-step reaction process is presented based on the developed models.

KW - Kinetics

KW - Oxidation

KW - Used nuclear fuel

KW - Voloxidation

UR - https://www.scopus.com/pages/publications/85018743714

U2 - 10.1016/j.jnucmat.2017.03.048

DO - 10.1016/j.jnucmat.2017.03.048

M3 - Article

AN - SCOPUS:85018743714

SN - 0022-3115

VL - 490

SP - 211

EP - 215

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Oxidation kinetics for conversion of U₃O₈ to ε-UO₃ with NO₂

Abstract

Keywords

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