b'ODS Oxide Dispersion StrengthenedOFRAC . Oak Ridge Fast Reactor Advanced Fuel CladdingONE .Office of Nuclear EnergyOPOperation Procedure ORNL .Oak Ridge National LaboratoryPCI .Pellet Clad InteractionsPCS Primary Coolant SystemPCT .Peak Clad TemperaturePCT .Pressure Composition TemperaturePFIB .Plasma Focused Ion BeamPI Principal InvestigatorPIE .Postirradiation ExaminationPIRT .Phenomena Identification and Ranking TablesPNNL Pacific Northwest National LaboratoryPQD Post-Quench DuctilityPVD .Physical Vapor DepositedPWR Pressurized Water ReactorQA Quality AssuranceR&D Research & DevelopmentRCT .Ring Compression TestingRD&D Research, Development, and DemonstrationRIA .Reactivity-Initiated Accident RITA Resonance Inspection Techniques and AnalysisRPI.Rensselaer Polytechnic Institute RTE Rapid Turnaround ExperimentRUS.Resonant Ultrasound Spectroscopy2019|AFC ACCOMPLISHMENTS 255'