Impact of Precipitation Parameters on the Specific Surface Area of PuO2

Hoar, Eric; Shehee, Thomas C.; Roy, Lindsay E.

doi:10.1021/acsomega.1c04964

Impact of Precipitation Parameters on the Specific Surface Area of PuO₂

Journal Article · Wed Dec 29 00:00:00 UTC 2021 · ACS Omega

DOI:https://doi.org/10.1021/acsomega.1c04964· OSTI ID:1844187

^[1]; Shehee, Thomas C. ^[1]; Roy, Lindsay E. ^[1]

Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

Controlling the properties of PuO₂ through processing is of vital importance to environmental transport and fate, production of nuclear fuels, nuclear forensic analyses, stockpile stewardship, and storage of nuclear wastes applications. A number of processing conditions have been identified to control final product properties, including specific surface area (SSA), residual carbon content, adsorption of volatile species, morphology, and particle size. In this paper, a novel approach is developed for the prediction of PuO₂ SSA via the synthetic route of Pu(IV) oxalate precipitation followed by calcination. The proposed model utilizes multivariate regression methodology and leave one out formalism to link Savannah River Site (SRS) precipitation and calcination production data to the SSA of the final product. A comparison among the models provides insight into the accuracy and ability to identify variations amongst the processing data. Additionally, the models may also be used to fit new data outside of the parameters explored in a production facility. Finally, the trained model was compared to a similarly trained conventional model form to illustrate the influence of precipitation parameters on the prediction of the final SSA. The models presented here attempt to provide new methods for more accurate prediction of the PuO₂ product properties in a production scale environment for key environmental and nuclear applications.

View Accepted Manuscript (DOE)

Research Organization:: Savannah River National Lab (SRNL), Aiken, SC (United States); Savannah River Site (SRS), Aiken, SC (United States)

Sponsoring Organization:: USDOE Office of Environmental Management (EM)

Grant/Contract Number:: 89303321CEM000080

OSTI ID:: 1844187

Report Number(s):: SRNL--STI-2021-00604; HSHQDN-16-X-00054

Journal Information:: ACS Omega, Journal Name: ACS Omega Journal Issue: 1 Vol. 7; ISSN 2470-1343

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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