Effect of Precipitation Conditions on the Specific Surface Area of Neptunium Oxide

Hill, Benjamin C.

doi:10.2172/829838

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…CERMET targets have favorable neutron flux, heat capacity, and density [24]. Most large scale NpO2 production dating back to the 1960s, have utilized oxalate precipitation of Np (IV) in direct strike at 50 °C followed by calcination at 550-650 °C to get a dark green, free flowing NpO2 powder [24][25][26][27][28][29]. The addition of Al as metallic matrix material is necessary to increase the thermal conductivity of the target and to serve as a binder for the cermet [30], moreover the aluminum is transparent to neutrons and compatible with water.…”

Section: Irradiationmentioning

confidence: 99%

Feasibility Evaluation on European Capabilities for ²³⁸Pu Based Radioisotope Power Systems

Acevedo,

Romojaro,

Van Den Eynde

et al. 2023

2023 13th European Space Power Conference (ESPC)

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Section: Irradiationmentioning

confidence: 99%

Feasibility Evaluation on European Capabilities for ²³⁸Pu Based Radioisotope Power Systems

Acevedo,

Romojaro,

Van Den Eynde

et al. 2023

2023 13th European Space Power Conference (ESPC)

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Impact of Precipitation Parameters on the Specific Surface Area of PuO₂

2021

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Controlling the properties of PuO 2 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 PuO 2 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 PuO 2 product properties in a production scale environment for key environmental and nuclear applications.

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Effect of Precipitation Conditions on the Specific Surface Area of Neptunium Oxide

Cited by 2 publications

References 3 publications

Feasibility Evaluation on European Capabilities for ²³⁸Pu Based Radioisotope Power Systems

Feasibility Evaluation on European Capabilities for ²³⁸Pu Based Radioisotope Power Systems

Impact of Precipitation Parameters on the Specific Surface Area of PuO₂

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Effect of Precipitation Conditions on the Specific Surface Area of Neptunium Oxide

Cited by 2 publications

References 3 publications

Feasibility Evaluation on European Capabilities for 238Pu Based Radioisotope Power Systems

Feasibility Evaluation on European Capabilities for 238Pu Based Radioisotope Power Systems

Impact of Precipitation Parameters on the Specific Surface Area of PuO2

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Feasibility Evaluation on European Capabilities for ²³⁸Pu Based Radioisotope Power Systems

Feasibility Evaluation on European Capabilities for ²³⁸Pu Based Radioisotope Power Systems

Impact of Precipitation Parameters on the Specific Surface Area of PuO₂