His experience at Idaho National Laboratory involves research, development, and engineering of processes and equipment, as well as managing projects and personnel in the treatment of various materials of interest for the U.S. Department of Energy, which includes spent nuclear fuel and associated high-level, transuranic and low-level wastes. The activities have primarily involved pyrochemical and electrochemical techniques and processes to separate and recover actinides from spent nuclear fuel, while directing fission and activation products into appropriate waste forms for disposal. He has a bachelor’s degree in chemical engineering from Brigham Young University and a master’s from Idaho State University. He is a professional engineer in chemical and nuclear engineering.
He is a research scientist from Idaho National Laboratory (INL) with extensive experience in the fields of materials electrochemistry as applied to reactive and refractory metals, process metallurgy, synthesis and characterization of high-temperature metals and materials, energy-efficient manufacturing processes, and materials recycling. While working at Bhabha Atomic Research Center, India, he developed an entirely new (molten salt based) process flow-sheet for the production of vanadium metal with a view to fabricate a self-powered beta detector. He also worked on the development of a new high-temperature process for the production of commercial-grade zirconia and silica powders from the indigenously available zircon mineral. His other projects have been aimed at recovering valuable materials from waste, secondary resources, and lean ore bodies. His team could successfully develop a technology for the conversion of Zr-2.5Nb alloy scrap to high purity zirconium crystal bar by van Arkel de Boer process. This technology can be adopted to successfully transform the alloy scrap into high purity zirconium crystal bar, a metal of significant importance to the nuclear energy program. At the University of Cambridge, he worked on the process optimization studies pertaining to the preparation of titanium metal and its alloys by a novel molten salt electrochemical process. He developed a preparative process for titanium-lanthanum alloy from their mixed oxides. At the Massachusetts Institute of Technology, he worked on a high-temperature electrochemical process to generate oxygen from the lunar regolith. This is one of the two technologies shortlisted by NASA for its eventual deployment to produce breathable oxygen from in situ (lunar) resources. At INL, the scientific underpinning of his research activities has been to study the behavior of metals and materials under a given set of conditions. His diverse research pursuits include materials electrochemistry, energy-efficient manufacturing processes, and materials recycling.
Dr. Brenda L. Garcia-Diaz is the manager of the Energy Materials Group in SRNL. She has a PhD in Chemical Engineering from the University of South Carolina with a specialization in electrochemical engineering. She has developed Nb-doped TiO2 electrocatalysts and developed models to better understand DMFC operation. Dr. Garcia-Diaz helped develop electrochemical synthesis methods for aluminum hydride. She has worked on novel electrochemical methods for nuclear fuel processing including the development of an electrochemical fluorination method for processing used nuclear fuel, direct LiT electrolysis for tritium recovery in fusion applications, and reduction of oxide nuclear fuels utilizing a solid oxide conducting anode. Dr. Garcia-Diaz is the principal investigator on a DOE SunShot program to investigate and mitigate corrosion in high temperature molten salt heat transfer systems for concentrating solar power (CSP) applications. She is the molten salt corrosion consultant to NREL for the development of a Gen 3 CSP system. Dr. Garcia-Diaz has also led research on the development of MAX phase coatings for accident tolerant nuclear fuel. She has led collaborations with multiple industrial partners, universities, and national laboratories.
Dr. Garcia-Diaz was awarded the ASM International Silver Award, the South Carolina Governor’s Young Researcher award, and the SRNL Early Career Award. In 2018, her project on electrochemical fluorination also won the inaugural SRNL award for LDRD return on investment. Dr. Garcia-Diaz serves as a Board Member for the American Institute of Chemical Engineers RAPID program for process intensification. She is an adjunct faculty member at the University of South Carolina in the Chemical Engineering Department. Dr. Garcia-Diaz is a member of the Hanford Tank Integrity Expert Panel.
He is senior staff scientist at Idaho National Laboratory. His experience covers a wide range of research topics related to nuclear reactor thermal-hydraulics, including two-phase flow modeling and simulation, numerical methods development in two-phase flow simulations, reactor safety analysis, system analysis code development, computational fluid dynamics in nuclear engineering, experimental two-phase flow, and experimental study on critical heat flux. His current work focuses on research and development of next-generation reactor system analysis code, modeling and simulation of two-phase flow, and thermal-hydraulics analysis to support advanced reactor designs (e.g., gas-cooled and molten salt-cooled high-temperature reactors). He has a doctorate in nuclear engineering from the University of Illinois at Urbana-Champaign, and earned a bachelor's degree from Tsinghua University, Beijing, China.
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