Fabrication, defect chemistry and microstructure of Mn-doped UO₂.

ABSTRACT: Mn-doped UO₂ is under consideration for use as an accident tolerant nuclear fuel. We detail the synthesis of Mn-doped UO₂ prepared via a wet co-precipitation method, which was refined to improve the yield of incorporated Mn. To verify the Mn-doped UO₂ 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 M₄-edge. It was established that Mn²⁺ directly substitutes for U⁴⁺ in the UO₂ lattice, accompanied by oxygen vacancy (O_v) charge compensation. In contrast to other divalent-element doped UO₂ materials, compelling eviden

SUBMITTER: Smith H 

PROVIDER: S-EPMC10796358 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature