Correlating nanoscale secondary ion mass spectrometry and atom probe tomography analysis of uranium enrichment in metallic nuclear fuel

Kautz, Elizabeth; Cliff, John; Lach, Timothy; Reilly, Dallas; Devaraj, Arun

doi:10.1039/d0an01831g

Title: Correlating nanoscale secondary ion mass spectrometry and atom probe tomography analysis of uranium enrichment in metallic nuclear fuel

Journal Article · Mon Nov 02 00:00:00 EST 2020 · Analyst

DOI:https://doi.org/10.1039/d0an01831g· OSTI ID:1763474

^[1]; Cliff, John ^[1];

^[2]; Reilly, Dallas ^[1]; Devaraj, Arun ^[1]

Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Accurate measurements of ²³⁵U enrichment within metallic nuclear fuels are essential for understanding material performance in a neutron irradiation environment, and the origin of secondary phases (e.g. uranium carbides). In this work, we analyse ²³⁵U enrichment in matrix and carbide phases in low enriched uranium alloyed with 10 wt% Mo via two chemical imaging modalities—nanoscale secondary ion mass spectrometry (NanoSIMS) and atom probe tomography (APT). Additionally, results from NanoSIMS and APT are compared to understand accuracy and utility of both approaches across length scales. NanoSIMS and APT provide consistent results, with no statistically significant difference between nominal enrichment (19.95 ± 0.14 at% ²³⁵U) and that measured for metal matrix and carbide inclusions.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC05-00OR22725; AC05-76RL01830

OSTI ID:: 1763474

Alternate ID(s):: OSTI ID: 1708915

Journal Information:: Analyst, Vol. 146, Issue 1; ISSN 0003-2654

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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