Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 296, Issue 1, Pages 105-110Publisher
SPRINGER
DOI: 10.1007/s10967-012-2063-9
Keywords
Uranium trioxide; Uranium oxide; X-ray diffraction; Raman spectroscopy; Fluorescence spectroscopy; Uranium oxide hydrolysis
Funding
- National Technical Nuclear Forensics Center (NFNFC, a department of the U.S. Department of Homeland Security)
- NA-22 in the National Nuclear Security Administration/Office of Nonproliferation & Verification Research and Development
- U.S. Department of Energy [DE-AC05-76RL01830]
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This work focuses on the polymorphic nature of the UO3 and UO3-H2O system, which are important materials associated with the nuclear fuel cycle. The UO3-water system is complex and has not been fully characterized, even though these species are key fuel cycle materials. Powder X-ray diffraction, and Raman and fluorescence spectroscopies were used to characterize both the several polymorphic forms of UO3 and the certain UO3-hydrolysis products for the purpose of developing predictive capabilities and estimating process history; for example, polymorphic phases of unknown origin. Specifically, we have investigated three industrially relevant production pathways of UO3 and discovered a previously unknown low temperature route to the production of beta-UO3. Several phases of UO3, its hydrolysis products, and key starting materials were synthesized and characterized as pure materials to establish optical spectroscopic signatures for these compounds for forensic analysis.
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