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Fabrication, defect chemistry and microstructure of Mn-doped UO2.
- Source :
- Scientific Reports; 1/18/2024, Vol. 13 Issue 1, p1-12, 12p
- Publication Year :
- 2024
-
Abstract
- Mn-doped UO<subscript>2</subscript> is under consideration for use as an accident tolerant nuclear fuel. We detail the synthesis of Mn-doped UO<subscript>2</subscript> prepared via a wet co-precipitation method, which was refined to improve the yield of incorporated Mn. To verify the Mn-doped UO<subscript>2</subscript> defect chemistry, X-ray absorption spectroscopy at the Mn K-edge was performed, in addition to X-ray diffraction, Raman spectroscopy and high-energy resolved fluorescence detection X-ray absorption near edge spectroscopy at the U M<subscript>4</subscript>-edge. It was established that Mn<superscript>2+</superscript> directly substitutes for U<superscript>4+</superscript> in the UO<subscript>2</subscript> lattice, accompanied by oxygen vacancy (O<subscript>v</subscript>) charge compensation. In contrast to other divalent-element doped UO<subscript>2</subscript> materials, compelling evidence for U<superscript>5+</superscript> in a charge compensating role was not found. This work furthers understanding of the structure and crystal chemistry of Mn-doped UO<subscript>2,</subscript> which could show potential advantages as a novel efficient advanced nuclear fuel. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20452322
- Volume :
- 13
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Scientific Reports
- Publication Type :
- Academic Journal
- Accession number :
- 174877702
- Full Text :
- https://doi.org/10.1038/s41598-023-50676-2