Extraction of Neptunium, Plutonium, Americium, Zirconium, and Technetium by Di-(2-Ethylhexyl)-Iso-Butyramide (DEHiBA) at High Metal Loadings

Hall, Gabriel B.; Bessen, Nathan P.; Zalupski, Peter R.; Campbell, Emily L.; Grimes, Travis S.; Peterman, Dean R.; Lumetta, Gregg J.

doi:10.1080/07366299.2023.2215833

Title: Extraction of Neptunium, Plutonium, Americium, Zirconium, and Technetium by Di-(2-Ethylhexyl)-Iso-Butyramide (DEHiBA) at High Metal Loadings

Journal Article · Fri May 26 00:00:00 EDT 2023 · Solvent Extraction and Ion Exchange

DOI:https://doi.org/10.1080/07366299.2023.2215833· OSTI ID:2208833

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Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Idaho National Laboratory (INL), Idaho Falls, ID (United States)

Increased focus on carbon neutral energy has generated a resurgence of interest in nuclear power, and in particular advanced reactors which are likely to utilize high assay low enriched uranium (HALEU). This in turn could increase the economic attractiveness of recovering still partially enriched uranium from used nuclear fuel. Concomitant to development of advanced reactors, advanced reprocessing schemes should be developed which address the disadvantages to well established reprocessing schemes. The present study focuses on using di-(2-ethylhexyl)-iso-butyramide (DEHiBA) under high metal loading conditions for the reprocessing of used nuclear fuel. The elements examined in the study include the dominant transuranic actinides (Np, Pu, Am) as well as the often-problematic Tc and Zr. Further, by increasing the concentration of the extractant from the more commonly reported 1.0 M – 1.5 M, the extraction of hexavalent actinides is substantially increased, while maintaining effective rejection of tri, tetra, and pentavalent actinides, particularly in the presence of high loadings of uranium. The extraction of Zr by 1.5 M DEHiBA is noted to be negligible by comparison to tributyl phosphate (TBP), however the coextraction of Tc with U is observed to be nominally twice the quantity that is extracted by TBP indicating a need for effective Tc management.

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Research Organization:: Idaho National Laboratory (INL), Idaho Falls, ID (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: AC07-05ID14517; AC05-76RL01830

OSTI ID:: 2208833

Report Number(s):: INL/JOU-23-74673-Rev000

Journal Information:: Solvent Extraction and Ion Exchange, Vol. 41, Issue 5; ISSN 0736-6299

Publisher:: Taylor and FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Extraction of Neptunium, Plutonium, Americium, Zirconium, and Technetium by Di-(2-Ethylhexyl)-Iso-Butyramide (DEHiBA) at High Metal Loadings

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