A5038420444- Metallurgical Processes and Thermodynamics
- Molten salt chemistry and electrochemical processes
- Laser-induced spectroscopy and plasma
- Analytical chemistry methods development
- Graphite, nuclear technology, radiation studies
- Nuclear Materials and Properties
- Thermodynamic and Structural Properties of Metals and Alloys
- Nuclear materials and radiation effects
- Crystallization and Solubility Studies
- High-Voltage Power Transmission Systems
- Iron and Steelmaking Processes
- Extraction and Separation Processes
- Metal Extraction and Bioleaching
- Peer-to-Peer Network Technologies
- Minerals Flotation and Separation Techniques
- Methane Hydrates and Related Phenomena
- Nuclear Physics and Applications
Idaho National Laboratory
2018-2025
Virginia Commonwealth University
2015-2018
University of Idaho
2012-2013
This paper introduces a novel optical cell design that integrates ultraviolet-visible (UV-vis) and laser-induced breakdown spectroscopy (LIBS) for comprehensive vapor phase chemical analysis at temperatures up to 450 °C.
In the pyrochemical separation of used nuclear fuel (UNF), fission product, rare earth, and actinide chlorides accumulate in molten salt electrolyte over time. Measuring this composition near real-time is advantageous for operational efficiency, material accountability, safeguards. Laser-induced breakdown spectroscopy (LIBS) has been proposed demonstrated as a potential analytical approach LiCl–KCl salts. However, all studies conducted to date have static surface which can lead issues with...
In this current study, the molten salt aerosol–laser-induced breakdown spectroscopy (LIBS) system was used to measure uranium (U) content in a ternary UCl 3 –LiCl–KCl investigate and assess near real-time analytical approach for material safeguards accountability. Experiments were conducted using five different U concentrations determine figures of merit with respect U. analysis, three lines develop univariate calibration curves at 367.01 nm, 385.96 387.10 nm lines. The line had lowest limit...
Pyroprocessing of used nuclear fuel (UNF) has many advantages—including that it is proliferation resistant. However, as part the process, special materials accumulate in electrolyte salt and present material accountability safeguards concerns. The main motivation this work was to explore a laser-induced breakdown spectroscopy (LIBS) approach an online monitoring technique enhance pyroprocessing. In work, vacuum extraction method draw molten (CeCl 3 -GdCl -LiCl-KCl) up into 4 mm diameter...
Laser-induced breakdown spectroscopy (LIBS) was used to detect and measure the concentrations of Ce Gd in aqueous aerosol solutions. A total 36 standards, with ranging from 100 parts per million (ppm) 10 000 ppm, were made explore relationship between them. In this study, a Collison nebulizer an argon carrier gas generate droplets. For each liquid sample, ten repetitions 200 laser shots recorded. The percent relative standard deviations (%RSD) on average 7.5% different sample repetitions....
Practical information is provided on electrochemical measurements in molten salt systems. The emphasis chloride and fluoride systems, but the principles are applicable to any high-temperature or oxide electrolyte system. Considerations given topics such as functionality of measurement equipment, reference electrodes, materials selection chemical compatibility, interpretation signals, properties, laboratory practices.
A triple bubbler sensor was tested in LiCl–KCl molten salt from 450 to 525 °C a transparent furnace validate thermal-expansion corrections and provide additional data sets for calibration validation of the sensor. In addition these tests, model identified further developed accurately determine density, surface tension, depth measured bubble pressures. unique feature is that constants can be estimated using independent measurements, which allow an electrorefiner where density tension are...
Separation of cesium chloride (CsCl) and strontium (SrCl2) from the lithium chloride-potassium (LiCl-KCl) salt was studied using a melt crystallization process similar to reverse vertical Bridgeman growth technique. A ternary SrCl2-LiCl-KCl explored at rates (1.8–5 mm/h) compared with CsCl results identify similarities. Quaternary experiments were also conducted cases trends possible limitations separations process. In case, as much 68% total could be recycled per batch quaternary...
Pyroprocessing of used nuclear fuel has shown potential as an alternative reprocessing technology to the traditional aqueous technology. Having a clear picture actinide, fission product, and rare-earth elements within salt in realtime is important from processes control, efficiency material safeguards perspectives. However, measuring molten electrolyte composition system challenging due high temperature radiation involved. Laser induced breakdown spectroscopy (LIBS) been proposed measure via...