b'PLS .Proportional Limit StressPSA Probability Safety AnalysisPTE .Post-transient ExaminationsPVD Physical Vapor DepositionPWR.Pressurized Water Reactor R&D .Research & DevelopmentRD&D Research, Development, and DemonstrationRIA .Reactivity-Initiated Accident RPI .Rensselaer Polytechnic InstituteRTT Ring Tension TestRUC Repeatable Unit CellRVE Representative Volume ElementSATS .Severe Accident Test StationSEH .Stored-energy Heat Up SEM .Scanning Electron MicroscopySERTTA .Static Environment Rodlet Transient Test Apparatus SFF Sodium Free Fuel SFR .Sodium Fast ReactorSI .Structural Integrity SiC .Silicon CarbideSMR .Small Modular ReactorSNC . Southern Nuclear Company SNM .Special Nuclear Materials STEM Scanning Transmission Electron MicroscopyTCM Thermal Conductivity MicroscopeTD .Theoretical DensityTEM .Transmission Electron MicroscopytFGR Transient Fission Gas ReleaseTHOR Temperature Heat Sink Overpower Response186 2022|AFC ACCOMPLISHMENTS'