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Title: Characterization of Uranium Ore Concentrate Chemical Composition via Raman Spectroscopy

Abstract

Uranium Ore Concentrate (UOC, often called yellowcake) is a generic term that describes the initial product resulting from the mining and subsequent milling of uranium ores en route to production of the U-compounds used in the fuel cycle. Depending on the mine, the ore, the chemical process, and the treatment parameters, UOC composition can vary greatly. With the recent advent of handheld spectrometers, we have chosen to investigate whether either commercial off-the-shelf (COTS) handheld devices or laboratory-grade Raman instruments might be able to i) identify UOC materials, and ii) differentiate UOC samples based on chemical composition and thus suggest the mining or milling process. Twenty-eight UOC samples were analyzed via FT-Raman spectroscopy using both 1064 nm and 785 nm excitation wavelengths. These data were also compared with results from a newly developed handheld COTS Raman spectrometer using a technique that lowers background fluorescence signal. Initial chemometric analysis was able to differentiate UOC samples based on mine location. Additional compositional information was obtained from the samples by performing XRD analysis on a subset of samples. The compositional information was integrated with chemometric analysis of the spectroscopic dataset allowing confirmation that class identification is possible based on compositional differences between the UOCmore » samples, typically involving species such as U3O8, α-UO2(OH)2, UO4•2H2O (metastudtite), K(UO2)2O3, etc. While there are clearly excitation λ sensitivities, especially for dark samples, Raman analysis coupled with chemometric data treatment can nicely differentiate UOC samples based on composition and even mine origin.« less

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1440626
Report Number(s):
PNNL-SA-133733
DN4001030
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: Proceedings of the SPIE: Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIX, April 15-19, 2018, Orlando, Flordia, 10629:Paper No. 106290G
Country of Publication:
United States
Language:
English

Citation Formats

Su, Yin-Fong, Tonkyn, Russell G., Sweet, Lucas E., Corbey, Jordan F., Bryan, Samuel A., and Johnson, Timothy J. Characterization of Uranium Ore Concentrate Chemical Composition via Raman Spectroscopy. United States: N. p., 2018. Web. doi:10.1117/12.2304304.
Su, Yin-Fong, Tonkyn, Russell G., Sweet, Lucas E., Corbey, Jordan F., Bryan, Samuel A., & Johnson, Timothy J. Characterization of Uranium Ore Concentrate Chemical Composition via Raman Spectroscopy. United States. doi:10.1117/12.2304304.
Su, Yin-Fong, Tonkyn, Russell G., Sweet, Lucas E., Corbey, Jordan F., Bryan, Samuel A., and Johnson, Timothy J. Wed . "Characterization of Uranium Ore Concentrate Chemical Composition via Raman Spectroscopy". United States. doi:10.1117/12.2304304.
@article{osti_1440626,
title = {Characterization of Uranium Ore Concentrate Chemical Composition via Raman Spectroscopy},
author = {Su, Yin-Fong and Tonkyn, Russell G. and Sweet, Lucas E. and Corbey, Jordan F. and Bryan, Samuel A. and Johnson, Timothy J.},
abstractNote = {Uranium Ore Concentrate (UOC, often called yellowcake) is a generic term that describes the initial product resulting from the mining and subsequent milling of uranium ores en route to production of the U-compounds used in the fuel cycle. Depending on the mine, the ore, the chemical process, and the treatment parameters, UOC composition can vary greatly. With the recent advent of handheld spectrometers, we have chosen to investigate whether either commercial off-the-shelf (COTS) handheld devices or laboratory-grade Raman instruments might be able to i) identify UOC materials, and ii) differentiate UOC samples based on chemical composition and thus suggest the mining or milling process. Twenty-eight UOC samples were analyzed via FT-Raman spectroscopy using both 1064 nm and 785 nm excitation wavelengths. These data were also compared with results from a newly developed handheld COTS Raman spectrometer using a technique that lowers background fluorescence signal. Initial chemometric analysis was able to differentiate UOC samples based on mine location. Additional compositional information was obtained from the samples by performing XRD analysis on a subset of samples. The compositional information was integrated with chemometric analysis of the spectroscopic dataset allowing confirmation that class identification is possible based on compositional differences between the UOC samples, typically involving species such as U3O8, α-UO2(OH)2, UO4•2H2O (metastudtite), K(UO2)2O3, etc. While there are clearly excitation λ sensitivities, especially for dark samples, Raman analysis coupled with chemometric data treatment can nicely differentiate UOC samples based on composition and even mine origin.},
doi = {10.1117/12.2304304},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {5}
}

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