Dr. Weaver recently re-joined Idaho National Laboratory (INL) in the spring of this year (2018), and is currently the technical lead for reactor systems safety, where he leads the effort on advanced reactor fuel testing and safety. Previous to re-joining INL, Dr. Weaver worked at TerraPower from 2007 until this year (2018), holding various positions including technical fellow, director of technology integration, and director of technology development, among others. In these capacities he was responsible for identifying, developing and maintaining U.S. and international joint programs and relationships that supported TerraPower technology development. Before joining TerraPower, Dr. Weaver worked at INL for more than nine years (1998-2007) in various capacities, all related to the development and use of advanced nuclear reactor concepts. With much of his career in advanced reactor design and analysis, Dr. Weaver initiated and executed complex test programs within TerraPower, and collaborated with fellow researchers on Generation IV nuclear energy systems, the Generation IV International Forum, and the Advanced Fuel Cycle Initiative. His experience has allowed him to focus on some of the critical technical challenges facing advanced reactor concepts, such as the development and testing of advanced nuclear fuels and materials. His technical background includes reactor physics, reactor design, fuel cycle analysis, radiation spectroscopy, radioisotope production, and reactor operations. In addition, Dr. Weaver is the author/co-author of more than 90 publications and technical reports in nuclear science and engineering, and is a co-author of a textbook on fast spectrum reactors. Dr. Weaver received a BS degree in physics from Brigham Young University, and PhD degree in nuclear engineering from the University of Utah.