XPS Investigation on Changes in UO2 Speciation following Exposure to Humidity

Donald, Scott B.; Davisson, M. Lee; Nelson, Art J.

doi:10.1557/adv.2016.286

Title: XPS Investigation on Changes in UO₂ Speciation following Exposure to Humidity

Abstract

High purity UO₂powder samples were subjected to accelerated aging under controlled conditions with relative humidity ranging from 34% to 98%. Characterization of the chemical speciation of the products was accomplished using X-ray photoelectron spectroscopy (XPS). A shift to higher uranium oxidation states was found to be directly correlated to increased relative humidity exposure. In addition, the relative abundance of O^2-, OH^-, and H₂O was found to vary with exposure time. Therefore, it is expected that uranium oxide materials exposed to high relative humidity conditions during processing and storage would display a similar increase in average uranium valence.

Authors:

Donald, Scott B. ^[1]; Davisson, M. Lee ^[1]; Nelson, Art J. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Publication Date:: Wed Apr 27 00:00:00 EDT 2016

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1247285

Report Number(s):: LLNL-CONF-685861
Journal ID: ISSN 2059-8521; applab; PII: S2059852116002863

Grant/Contract Number:: AC52-07NA27344

Resource Type:: Accepted Manuscript

Journal Name:: MRS Advances

Additional Journal Information:: Journal Volume: 1; Journal Issue: 44; Conference: Presented at: 2016 MRS Spring Meeting & Exhibit, Phoenix, AZ, United States, Mar 28 - Apr 01, 2016; Journal ID: ISSN 2059-8521

Publisher:: Materials Research Society (MRS)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; actinide; x-ray photoelectron spectroscopy (XPS); surface chemistry

Citation Formats


                    Donald, Scott B., Davisson, M. Lee, and Nelson, Art J. XPS Investigation on Changes in UO2 Speciation following Exposure to Humidity.  United States: N. p., 2016. 
Web.  doi:10.1557/adv.2016.286.

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                    Donald, Scott B., Davisson, M. Lee, & Nelson, Art J. XPS Investigation on Changes in UO2 Speciation following Exposure to Humidity.  United States.  https://doi.org/10.1557/adv.2016.286

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                    Donald, Scott B., Davisson, M. Lee, and Nelson, Art J. Wed .  
"XPS Investigation on Changes in UO2 Speciation following Exposure to Humidity".  United States.  https://doi.org/10.1557/adv.2016.286.  https://www.osti.gov/servlets/purl/1247285.

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@article{osti_1247285,

  title        = {XPS Investigation on Changes in UO2 Speciation following Exposure to Humidity},

  author       = {Donald, Scott B. and Davisson, M. Lee and Nelson, Art J.},

  abstractNote = {High purity UO2powder samples were subjected to accelerated aging under controlled conditions with relative humidity ranging from 34% to 98%. Characterization of the chemical speciation of the products was accomplished using X-ray photoelectron spectroscopy (XPS). A shift to higher uranium oxidation states was found to be directly correlated to increased relative humidity exposure. In addition, the relative abundance of O2-, OH-, and H2O was found to vary with exposure time. Therefore, it is expected that uranium oxide materials exposed to high relative humidity conditions during processing and storage would display a similar increase in average uranium valence.},

  doi          = {10.1557/adv.2016.286},

  journal      = {MRS Advances},

  number       = 44,

  volume       = 1,

  place        = {United States},

  year         = {Wed Apr 27 00:00:00 EDT 2016},

  month        = {Wed Apr 27 00:00:00 EDT 2016}

}

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Works referenced in this record:

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Similar Records

Title: XPS Investigation on Changes in UO2 Speciation following Exposure to Humidity

Abstract

Citation Formats

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Title: XPS Investigation on Changes in UO₂ Speciation following Exposure to Humidity

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