b"2020 - 2025NS&T: Connecting Science to DeploymentINTRODUCTIONQualification of high temperature gas-cooled reactor I NL (and its predecessors) has a proud history in performingtechnologies to enable commercialization of high engineering research to support the development andtemperature gas-cooled reactor systems (2000-today)deployment of nuclear energy systems. Over the past 70This proud history is part of the DNA of INLs people, years, INL has created an enduring legacy of nuclear energy- its facilities and how we approach our research missions related accomplishments and impacts that have shaped thetoday, and will be going forward into the future. We industry of today, including: are at our core an engineering research laboratory, one Establishment through extensive testing (e.g., Semiscale,that builds on science fundamentals to demonstrate Loss-of-Fluid Test Facility (LOFT), Power Burst Facilityand evaluate systems performance at scale in order to (PBF), Special Power Excursion Reactor Test (SPERT))establish regulatory bases for approval and minimize of the safety bases of light-water reactors ('60s and '70s) risk and the cost of nuclear systems deployment. And we have deployed this capability to impact broad Development and operation of aqueous fuel processingnational challenges involving security, competitiveness, environmental sustainability, health, and education.supporting national security missions ('60s, '70s, and '80s)Development of state-of-the-art computational codesGoing forward, we recognize that our challenges and (Reactor Excursion and Leak Analysis Programopportunities are substantially changed from those of (RELAP5) and Systems Analysis Program for Hands- our past. The economics of domestic nuclear energy are on Integrated Reliability Evaluation (SAPHIRE)) usednot as favorable, while global competition has eroded to calculate the safety behavior and risk, and establishU.S. leadership in growing international markets. Where regulatory bases, of light-water reactor systems around thein the past INL deployed engineering research to world ('70s, '80s, and '90s) establish the foundations of an entirely new industry, the Qualification of sodium-cooled fast reactor technologiesindustry today is mature yet evolving. What is the role of to enable commercialization of fast reactor and fuel cyclethe lead nuclear research directorate within the nations systems ('80s and '90s) nuclear energy laboratory in this context? 1949 1952 1964 1972 Current Current Current Future Future FutureExperimental BreederMaterials Test ReactorExperimental BreederPower Burst Facility (PBF)Advanced Test ReactorTransient Reactor Test FacilityNeutron Radiography ReactorMicroreactor Small Modular Reactor Versatile Test ReactorReactor-I (EBR-I)(MTR) 1952 -1970 Reactor-II (EBR-II) 1972 -1985 (ATR) 1967 - Current (TREAT) 1959-1994 (NRAD)2023 (SMR)(VTR) 1949 -1970 1964 -1994 2017 - Current 1975 - Current 2026 20262"