A5062361067- Nuclear Materials and Properties
- Nuclear reactor physics and engineering
- Radioactive element chemistry and processing
- Fusion materials and technologies
- Nuclear Physics and Applications
- Radioactive contamination and transfer
- Mass Spectrometry Techniques and Applications
- Analytical chemistry methods development
- Nuclear materials and radiation effects
- Isotope Analysis in Ecology
- Nuclear and radioactivity studies
- Advanced Materials Characterization Techniques
- Aluminum Alloys Composites Properties
- Ion-surface interactions and analysis
- Atomic and Subatomic Physics Research
- Hydrogen embrittlement and corrosion behaviors in metals
- Thermodynamic and Structural Properties of Metals and Alloys
- Graphite, nuclear technology, radiation studies
- Radiation Detection and Scintillator Technologies
- Advanced NMR Techniques and Applications
- Laser-induced spectroscopy and plasma
- Molten salt chemistry and electrochemical processes
- Advanced Welding Techniques Analysis
- Nuclear Engineering Thermal-Hydraulics
- Concrete and Cement Materials Research
Idaho National Laboratory
2010-2024
Centro Uruguayo de Imagenología Molecular
2012
Argonne National Laboratory
1997-2003
University of Cincinnati
1995
Youngstown State University
1991-1992
Abstract A plate-type nuclear fuel consisting of a solid monolithic foil U-10 wt. %Mo is under development for use in the United States' high-performance research reactors. In support developing this fuel, has been fabricated first time by commercial vendor and subsequently irradiated test reactor. This provides an opportunity to evaluate postirradiation mechanical properties commercially fuel. Four-point bend testing was conducted on U-10Mo samples generate material properties, including...
The development of a head-end processing step for spent oxide fuel that applies to both aqueous and pyrometallurgical technologies is being performed by the Idaho National Laboratory, Oak Ridge Korean Atomic Energy Research Institute through joint International Nuclear Initiative. employs high temperatures oxidative gases promote oxidation UO2 U3O8. Potential benefits include removal or reduction fission products as well separation from cladding. effects temperature, pressure, gas, cladding...
Application of an isotope-dilution method for determining 90Zr and 90Sr in a source material spiked with 86Sr 92Zr is described. A miniature gas pressurized extraction chromatography (GPEC) system column containing Eichrom Sr Resin™ was used separating the elements so isobaric isotopes could be measured by mass spectrometry. Zirconium rinsed through 3 M HNO3/trace HF strontium eluted 1% acetic acid. Two spectrometric techniques, inductively coupled plasma spectrometry (ICP-MS) thermal...
In this study we compared the microstructure evolution of U-Mo fuel foils produced with and without heat treatment at low burn-up via advanced post-irradiation examination. The aim is to observe after irradiation ways in which fabrication processes have influenced behavior early-stage irradiation, as for very burn up microstructural studies are lacking. work it was observed that larger grain size detected heat-treated samples before led decreased refinement irradiation. Grain associated...
In this study, the effect of various scanning electron microscope (SEM) imaging parameters, including voltage, beam current, and magnification, on porosity analysis U-Mo fuel was investigated by varying one parameter at a time during back-scattered (BSE) micrograph acquisition. Among parameters assessed, is most sensitive to SEM voltage. range from 5 kV 30 kV, we reported relative differences as high 30%, 10%, 20% in total porosity, average diameter, pore density, respectively. Monte Carlo...
Interferences are a major consideration in all forms of plasma mass spectrometry. Investigations into the use He, Ne, N 2 , and Kr radio-frequence glow discharge spectrometry (rf GD-MS) have been undertaken to study their potential as alternative gases. All gases exhibited expected behavior with respect pressure power. Background species discussed for each gas, along effect gas on analyte intensities Standard Reference Material (SRM) copper 500. A helium yields highest analytes (Cr, Fe, Ni,...
A direct-injection nebulizer (DIN) has been evaluated for liquid sample introduction in helium microwave-induced plasma mass spectrometry (MIP-MS). short-term stability test with the was found to give less than 0.5% RSD twenty minutes. Isotope abundances K, Ca, Cr, and Se were determined 10% error on all isotopes. All elements have linear dynamic ranges of two three orders magnitude. Detection limits are low sub-ppb elements. Ion lens tuning plays an important role multielement...
An alternate ion source for mass spectrometry (MS) has been developed and tested its efficiency in ionizing gaseous samples. This work involves the use of a helium low-pressure inductively coupled plasma (ICP) MS system detection halogenated gas chromatographic effluents. Its performance evaluated terms sensitivity, limit, linear range reproducibility. Results show limits <10 pg with about 2–3 orders magnitude. Repeatability tests relative standard deviations between 2 5%. Solvent effects...