Mar, 2027
ORNL Report
Publications
Feb, 2027
Journal
Raman spectroscopy and multivariate analysis for quantifying uranium(VI) under uranyl nitrate crystallization-relevant conditions
A fiber-optic Raman spectroscopy approach was developed for solution-phase, in situ quantification of U(VI) under uranyl nitrate crystallization-relevant conditions, where temperature fluctuations and chemically complex matrices can compromise calibration performance. A multivariate regression framework is presented that combines Raman spectroscopy, design of experiments,…
Jan, 2027
Journal
Selective Cr dissolution and redistribution in Fe-Cr during localized FLiNaK salt exposure
Understanding the atomic-scale origins of corrosion in molten fluoride salt environments is essential for developing resilient materials for advanced nuclear and energy systems. Here, we investigate the response of an epitaxially grown Fe-8Cr alloy film to localized FLiNaK salt exposure to elucidate early-stage degradation mechanisms. High-resolution scanning transmission…
Jan, 2027
Journal
SCALE validation for pebble bed reactor applications using the HTR-PROTEUS benchmark suite
Reliable simulation of graphite-moderated pebble bed reactors requires validation against integral experiments. This work validates the SCALE development version (SCALE 7.0 Beta 12) against the HTR-PROTEUS benchmark suite from the International Handbook of Evaluated Reactor Physics Benchmark Experiments (IRPhE). Eleven critical configurations were analyzed, including hexag…
Jan, 2027
Journal
Investigation of wire arc additive manufacturing for the fabrication of composite autoclave molds
Current manufacturing techniques for Invar composite autoclave molds are manual labor-intensive, and result in long lead times. With the emergent application of wire arc additive manufacturing (WAAM) to the manufacturing of composite molds, lead times can be shortened considerably. In this work, a design and fabrication framework for incorporating WAAM into the manufacturi…
Jan, 2027
Journal
Enabling spatial analysis of living cell/electrode interfaces
In bioelectronic devices, connectivity of bacterial layers to the electrode surface is of paramount importance, yet difficult to characterise. Here, we provide a multimodal characterisation of the interfacial structure between cyanobacteria and conductive surfaces by combining complementary analytical techniques including neutron reflectometry, quartz crystal microbalance…
Jan, 2027
Journal
Designing porous transport layers for optimal bubble transport in water electrolyzers
Optimizing the design of porous transport layers (PTLs) is essential for enhanced bubble transport in polymer electrolyte membrane (PEM) water electrolyzers. This study utilized operando neutron imaging to understand multiphase bubble transport behaviour in titanium-based PTLs and identified PTL characteristics that lead to lower mass transport resistance and superior perf…
Dec, 2026
Journal
Quantifying biases and limitations of two-dimensional DIC during LOCA burst testing of fuel cladding to support deployment in hot cell environments
Accurately characterizing nuclear fuel cladding deformation under postulated loss-of-coolant (LOCA) conditions is essential for refining reactor safety limits and qualifying accident tolerant fuel (ATF). Nondestructive hot-cell techniques are particularly valuable for providing real-time measurements of scarce irradiated specimens without compromising integrity. Digital im…
Dec, 2026
Journal
Effects of PFOS on the behavior, growth, emergence, and predation susceptibility of larval mosquitoes (Culex quinquefasciatus)
Per-/polyfluoroalkyl substances (PFAS) have been commonly used over several decades for a variety of products and are very persistent in the environment. However, not much is known about their direct effects on aquatic invertebrates and their ecosystems. We examined the survival, behavior, development, and predation susceptibility of mosquito larvae Culex quinquefasciatus…
Dec, 2026
Journal
Beam test performance of AstroPix sensor with 120 GeV protons
AstroPix is a High-Voltage CMOS Monolithic Active Pixel Sensor (HV-CMOS MAPS) developed for precision gamma-ray imaging and spectroscopy in the medium-energy regime, as well as for precise shower imaging and tracking in the Barrel Imaging Calorimeter (BIC) of the Electron Proton/Ion Collider (ePIC) detector at the future Electron–Ion Collider (EIC). We present beam test re…
Dec, 2026
Journal
Coupled heat and mass transfer in internally cooled silica gel-coated aluminum foam heat exchangers for dehumidification
Solid desiccant dehumidifiers offer significant potential to improve humidity control in buildings due to their ability to independently regulate latent (humidity) and sensible (temperature) loads. However, adsorption of water vapor by desiccants is an exothermic process; the resulting heat of adsorption increases both the desiccant bed temperature and the temperature of t…