b'TABLE OF CONTENTSLDRD Overview Acronyms & Abbreviations13Collaboration14Periodic table of elements16Nuclear ReactorA combinatorial modeling and simulation and Sustainment andseparate effect test approach to investigate unknown expanded Deploymentmicrostructural evolution in metallic fuel pin 2019 Accelerated technology development through new extrapolation and validation methods 22Demonstrating fueled-salt irradiation capability to support reactor deployment 24Informative design of high temperature metal hydride moderators in microreactors 26Modeling and measurement of gas transport in nuclear fuels 28Accelerating pathways to actinide materials discovery through combinatorial deposition 30In situ positron annihilation spectroscopy for characterizing irradiation-induced defects 32Passive strain measurements for experiments in radiation environments 34Scalable framework of hybrid modeling with anticipatory control strategy for autonomous operation of modular and microreactors 36Machine learning interatomic potentials for radiation damage and physical properties in model fluorite systems 39An innovative approach for accelerated irradiation studies of materials 40Accelerating and improving the reliability of low failure probability computations to support the efficient safety evaluation and deployment of advanced reactor technologies 42Quantitative reliability analysis for unattended operation of fission batteries 48Development of multiphysics object oriented simulation environment based capabilities to model hydrogen migration in hydrides-moderated microreactors 50Characterizing corrosion mechanisms of structural alloys in actinide-based molten chloride salt 524'