|About this Abstract
|MS&T21: Materials Science & Technology
|Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments
|Unraveling Solute-solvent Interactions in Molten Salt Environments Using X-ray Absorption Spectroscopy
|On-Site Speaker (Planned)
Understanding the factors that control solubility and speciation of metal ions in molten salts is key for their successful deployment in molten salt reactors (MSR). We investigate the speciation and radiation-induced nanoparticle formation for metal ions in molten salts using X-ray absorption spectroscopy (XAS). XAS is an element specific technique that allows studying the local coordination environment and chemical structure of metal species (Ni, Co) in molten salt systems. XAS studies are combined with optical absorption spectroscopy and molecular dynamics simulations to investigate the coordination environment of metals in molten salt systems. The evolution of local structure of metal ions as function of temperature, metal ion concentration, and radiation dose in various molten salt systems will be discussed. Such knowledge of speciation of metals and radiation-induced nanoparticles in molten salt environments provides a critical understanding needed to predict and control physical and chemical properties of molten salts for MSR applications.