b'DIC Developments for RHT and Coating Behavior AssessmentPrincipal Investigator: Robert HansenTeam Members/Collaborators: Prasenjit Dewanjee, Philip Petersen, Fabiola Cappia, Jake Stockwell, David KamermanPairing DIC with the ring hoop test at room and elevatedI n recent years, the Idaho National Laboratory (INL) Accident Tolerant Fuel (ATF) Post-irra-temperature enables advanced assessment of ATFdiation Examination program has cladding and coating thermomechanical behavior. developed techniques for accurate measurement of cladding material properties. Anisotropic ATF cladding concepts being pursued require assessment with methods like the Ring Hoop Test (RHT), which consumes only small amounts of irradiated cladding material and interfaces easily with existing infrastructure at INL hot cells. Historically, several configurations have been used, each with unique advantages and shortcomings. Importantly, the various configura-tions can produce significantly different measured material proper-ties, and the unique stress states of the configurations can interact with coated ATF claddings differently. To address these challenges and validate modeling studies of the test methods, digital image correlation (DIC) has been implemented for Figure 1. Diagrams of the two RTT configurations. The dogbone (left) with aout-of-cell RHT experiments with a double gauge supported by a central insert, and the hemi (right) with a single gauge supported by hemicylindrical inserts variety of ATF coated zircaloy clad-ding concepts. This work enables deployment and interpretation of robust in-cell testing on irradiated cladding samples.Project Description:Pairing DIC with RHT experiments offers two significant advancements in cladding mechanical testing. The first is experimental validation of computer modeling efforts. Previous RHT development utilized finite element modeling to understand the 84 2023|AFC ACCOMPLISHMENTS'