An XPS study on the impact of relative humidity on the aging of UO2 powders
Abstract
High resolution x-ray photoemission spectroscopy (XPS) was used to characterize the chemical speciation of high purity uranium dioxide (UO2) powder samples following aging for periods of up to one year under controlled conditions with relative humidity ranging from 34% to 98%. A systematic shift to higher uranium oxidation states, and thus an increase in the mean uranium valence, was found to directly correlate with the dose of water received (i.e. the product of exposure time and relative humidity). Exposure duration was found to have a greater impact on sample aging than relative humidity. Lastly, the sample aged at 98% relative humidity was found to have unique structural differences for exposure time beyond 180 days when observed by scanning electron microscopy (SEM).
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1347674
- Alternate Identifier(s):
- OSTI ID: 1411827
- Report Number(s):
- LLNL-JRNL-704464
Journal ID: ISSN 0022-3115; TRN: US1700867
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Nuclear Materials
- Additional Journal Information:
- Journal Volume: 487; Journal Issue: C; Journal ID: ISSN 0022-3115
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
Citation Formats
Donald, Scott B., Dai, Zurong R., Davisson, M. Lee, Jeffries, Jason R., and Nelson, Art J. An XPS study on the impact of relative humidity on the aging of UO2 powders. United States: N. p., 2017.
Web. doi:10.1016/j.jnucmat.2017.02.016.
Donald, Scott B., Dai, Zurong R., Davisson, M. Lee, Jeffries, Jason R., & Nelson, Art J. An XPS study on the impact of relative humidity on the aging of UO2 powders. United States. https://doi.org/10.1016/j.jnucmat.2017.02.016
Donald, Scott B., Dai, Zurong R., Davisson, M. Lee, Jeffries, Jason R., and Nelson, Art J. Fri .
"An XPS study on the impact of relative humidity on the aging of UO2 powders". United States. https://doi.org/10.1016/j.jnucmat.2017.02.016. https://www.osti.gov/servlets/purl/1347674.
@article{osti_1347674,
title = {An XPS study on the impact of relative humidity on the aging of UO2 powders},
author = {Donald, Scott B. and Dai, Zurong R. and Davisson, M. Lee and Jeffries, Jason R. and Nelson, Art J.},
abstractNote = {High resolution x-ray photoemission spectroscopy (XPS) was used to characterize the chemical speciation of high purity uranium dioxide (UO2) powder samples following aging for periods of up to one year under controlled conditions with relative humidity ranging from 34% to 98%. A systematic shift to higher uranium oxidation states, and thus an increase in the mean uranium valence, was found to directly correlate with the dose of water received (i.e. the product of exposure time and relative humidity). Exposure duration was found to have a greater impact on sample aging than relative humidity. Lastly, the sample aged at 98% relative humidity was found to have unique structural differences for exposure time beyond 180 days when observed by scanning electron microscopy (SEM).},
doi = {10.1016/j.jnucmat.2017.02.016},
journal = {Journal of Nuclear Materials},
number = C,
volume = 487,
place = {United States},
year = {Fri Feb 10 00:00:00 EST 2017},
month = {Fri Feb 10 00:00:00 EST 2017}
}
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Works referencing / citing this record:
Energetics of hydration on uranium oxide and peroxide surfaces
journal, June 2019
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