He is a senior nuclear reactor physicist and a fellow in the Nuclear Science and Technology Directorate at Idaho National Laboratory (INL). He has extensive experience in reactor physics, criticality safety, depletion and spent fuel characterization, cross-section processing, and computer code verification and validation. He joined INL in 2010 from Oak Ridge National Laboratory to assume a leadership role in reactor physics methods and applications, supporting both the INL Advanced Test Reactor (ATR) and Transient Reactor Test Facility (TREAT). He is currently the principal investigator and research director for development and validation of a modeling and simulation capability for TREAT under the U.S. Department of Energy (DOE) Nuclear Energy Advanced Modeling and Simulation program (NEAMS). He also served as a technical lead for design, methods development, and validation for the conversion of ATR to Low Enriched Uranium (LEU) under the DOE Office of Material Management and Minimization. He is the primary developer of the NEWT and TRITON reactor physics computer codes released within the SCALE code system for nuclear analysis. He holds degrees in nuclear engineering from Texas A&M University and is a fellow of the American Nuclear Society (ANS). He has served as session organizer and chair for numerous technical sessions at national conferences. He has more than 100 publications in journals, conference proceedings, and national laboratory reports related to computational methods and applications in reactor physics, radiation transport, criticality safety and depletion methods for spent nuclear fuel.
With 23 years of experience in engineering design, safety, and analysis of nuclear and energy systems, he has served as a principal member of the technical staff at Sandia National Laboratories since 1995, as well as a research associate professor at the University of New Mexico since 2012. His key areas of expertise include computational fluid dynamics, turbulence, dimpling, swirl, advanced manufacturing, and heat transfer. He is experienced with gas, water, molten salt, and heavy-water cooled reactors, including large, small, and miniature reactors. His primary technical achievements include right-sized dimpling, the LIKE algorithm, design of advanced fire sprinklers, isotropic turbulence decay model, development of five new vortices, a vortex unification theory, dynamic swirl modeling, and central recirculation zone modulation. He earned a doctorate in nuclear engineering from the University of New Mexico, as well as a doctorate in philosophy and apologetics from Trinity Seminary and College. He earned two master’s degrees in applied mathematics from the University of New Mexico and mechanical engineering from the University of Idaho, and a bachelor’s in nuclear engineering from the University of California - Santa Barbara. He is currently writing an engineering book for the Springer Publishing Company entitled, “Applied Computational Fluid Dynamics and Turbulence Modeling.”
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