Electrodeposition of uranium and thorium onto small platinum electrodes

Reichenberger, Michael A.; Ito, Takashi; Ugorowski, Philip B.; Montag, Benjamin W.; Stevenson, Sarah R.; Nichols, Daniel M.; McGregor, Douglas S.

doi:10.1016/j.nima.2015.12.046

Cited by 12 publications

(14 citation statements)

References 5 publications

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“…Prototype detector dimensions were also too large for in-core deployment. Precise deposition and characterization of neutron conversion material is necessary in order to deploy MPFDs in test reactors [8].…”

Section: Figure 1 Here Figure 2 Herementioning

confidence: 99%

“…Shadow masks are used to evaporate electrodes of the desired shape onto the alumina substrate. Electrodes as small as 0.33 mm in diameter have been successfully evaporated and coated with neutron-conversion materials [8].…”

Section: Neutron-conversion Materials Electrodepositionmentioning

confidence: 99%

“…Numerous deposition methods have been reported, but apparently were not well characterized [6]. However, electrodeposition has been determined to be a reliable and repeatable method of deposition [8]. The cyclic potential sweep process utilizes a platinum working electrode and a silver/silver-chloride reference electrode and has been successfully used to coat small amounts of natural uranium (shown in Fig.…”

Section: Neutron-conversion Materials Electrodepositionmentioning

confidence: 99%

“…The cyclic potential sweep process utilizes a platinum working electrode and a silver/silver-chloride reference electrode and has been successfully used to coat small amounts of natural uranium (shown in Fig. 4) and thorium upon the conductive electrodes [8]. However, measurement of the natural radioactivity emitted from the samples has proven to be an effective method of estimating the deposition mass.…”

Section: Neutron-conversion Materials Electrodepositionmentioning

confidence: 99%

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Micro-Pocket Fission Detectors (MPFDs) for in-core neutron detection

Reichenberger

Unruh

Ugorowski

et al. 2016

Annals of Nuclear Energy

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Neutron sensors capable of real-time measurement of neutrons in high-flux environments are necessary for tests aimed at demonstrating the performance of experimental nuclear reactor fuels and materials in material test reactors (MTRs). In-core Micro-Pocket Fission Detectors (MPFDs) have been studied at Kansas State University for many years. Previous MPFD prototypes were successfully built and tested with promising results. Efforts are now underway to develop advanced MPFDs with radiation-resistant, high-temperature materials capable of withstanding irradiation test conditions in high performance material and test reactors. Stackable MPFDs have been designed, built, and successfully demonstrated as in-core neutron sensors. Advances in the electrodeposition and measurement of neutron reactive material, along with refinements to composition optimization simulations, have enhanced the capabilities of contemporary MPFDs.

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Section: Figure 1 Here Figure 2 Herementioning

confidence: 99%

Section: Neutron-conversion Materials Electrodepositionmentioning

confidence: 99%

Section: Neutron-conversion Materials Electrodepositionmentioning

confidence: 99%

Section: Neutron-conversion Materials Electrodepositionmentioning

confidence: 99%

See 2 more Smart Citations

Micro-Pocket Fission Detectors (MPFDs) for in-core neutron detection

Reichenberger

Unruh

Ugorowski

et al. 2016

Annals of Nuclear Energy

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“…A 1.5-mm diameter electrode was evaporated onto the bottom disk and electrodeposited with natural uranium [8]. X-ray fluorescence was used to confirm the presence of uranium on each sample.…”

Section: Sensor Fabricationmentioning

confidence: 99%

Fabrication and Testing of a Modular Micro-Pocket Fission Detector Instrumentation System for Test Nuclear Reactors

et al. 2018

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Abstract-Advancements in nuclear reactor core modeling and computational capability have encouraged further development of in-core neutron sensors. Measurement of the neutron-flux distribution within the reactor core provides a more complete understanding of the operating conditions in the reactor than typical ex-core sensors. Micro-Pocket Fission Detectors have been developed and tested previously but have been limited to singlenode operation and have utilized highly specialized designs. The development of a widely deployable, multi-node Micro-Pocket Fission Detector assembly will enhance nuclear research capabilities. A modular, four-node Micro-Pocket Fission Detector array was designed, fabricated, and tested at Kansas State University. The array was constructed from materials that do not significantly perturb the neutron flux in the reactor core. All four sensor nodes were equally spaced axially in the array to span the fuel-region of the reactor core. The array was filled with neon gas, serving as an ionization medium in the small cavities of the MicroPocket Fission Detectors. The modular design of the instrument facilitates the testing and deployment of numerous sensor arrays. The unified design drastically improved device ruggedness and simplified construction from previous designs. Five 8-mm penetrations in the upper grid plate of the Kansas State University TRIGA Mk. II research nuclear reactor were utilized to deploy the array between fuel elements in the core. The Micro-Pocket Fission Detector array was coupled to an electronic support system which has been specially developed to support pulse-mode operation. The Micro-Pocket Fission Detector array composed of four sensors was used to monitor local neutron flux at a constant reactor power of 100 kWth at different axial locations simultaneously. The array was positioned at five different radial locations within the core to emulate the deployment of multiple arrays and develop a 2-dimensional measurement of neutron flux in the reactor core.

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Uranium electrodeposition at boron-doped diamond electrodes

Acevedo-González,

Peña-Duarte,

Lagle

et al. 2024

J Appl Electrochem

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The uranium electrodeposition process on a boron-doped diamond electrode (BDD) surface at varying potentials as a means of environmental uranium remediation has been studied. The chronoamperometry technique was employed for the electrodeposition process, applying potentials ranging from − 0.60V to -2.00V vs. the reversible hydrogen electrode (RHE). A 2mM uranyl acetate dihydrate (UO 2 (C 2 H 3 O 2 ) 2 •2H 2 O) solution in 0.1M KClO 4 served as a model uranyl ion (UO 2 2+ ) source. Analysis using scanning electron microscopy, energy-dispersive X-ray uorescence spectroscopy, and atomic force microscopy (AFM) con rmed the presence of uranium and the formation of a thin layer on the electrode surface. Roughness measurements obtained through AFM analysis at different applied potentials vs. RHE were compared before and after uranium electrodeposition at BDD electrodes. Additionally, the identi cation of various uranium oxides resulting from the electrodeposition procedures was conducted using X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. These analyses revealed the presence of UO 2 , UO 3 , and U 3 O 8 on the BDD electrode surface due to the electrochemical deposition process, with a notable proportion of U 3 O 8 observed. Ultimately, the optimal potential for e cient U 6+ remediation from aqueous media and the formation of a uniform thin layer conducive to nuclear technology development was determined to be -1.75V vs. RHE.

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Electrodeposition of uranium and thorium onto small platinum electrodes

Cited by 12 publications

References 5 publications

Micro-Pocket Fission Detectors (MPFDs) for in-core neutron detection

Micro-Pocket Fission Detectors (MPFDs) for in-core neutron detection

Fabrication and Testing of a Modular Micro-Pocket Fission Detector Instrumentation System for Test Nuclear Reactors

Uranium electrodeposition at boron-doped diamond electrodes

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