b'guided early stages of the develop-ment activities and identified the critical feasibility and performance issues. The 5-year plan prioritizes experimental and modeling activi-ties to address critical limitations of SiC-based cladding technologies. The demonstration of hermetic cladding and its end plug under normal operating environments has been identified as one of the most critical feasibility issues. Other related normal operation critical performance issues are hydrothermal corrosion and bowing of SiC/SiC composite cladding. Advanced materials testing under accident conditions is also required to obtain important but missing data needed to conduct accident analysis. Material property solutions will be delivered numerically and experimentally to mitigate the critical cladding perfor-mance issues. The various activities proposed in the document leverage unique capabilities and expertise available at the national laboratories, including the Advanced Test Reactor and Transient Reactor Test Facility at Idaho National Laboratory, and High Flux Isotope Reactor and Severe Accident Test Station at Oak Ridge National Laboratory.During the 5-year project period, a transition into a technology integra-Figure 2. SiC/SiC development strategy and 5-year execution plan document tion and implementation phase is anticipated, as illustrated in Figure 3. The technology integration phase 68 2023|AFC ACCOMPLISHMENTS'