b'High-Temperature Steam Oxidation of IrradiatedFeCrAl in the Severe Accident Test StationPrincipal Investigator: Yong YanTeam Members/ Collaborators: Y. Yan, K. Linton, J. M. Harp, Z. Burns, T. Jordan, and B. JohnstonFigure 1. High-magnification imageT he first fueled irradiation exper- three rodlets of FeCrAl alloy C35MN of ATF-18 cross section showing aiments of Accident Tolerant(Fe-13Cr-5Al) cladding combined gap between the irradiated FeCrAlFuel (ATF) concepts, referredwith UO 2pellets fabricated at Oak cladding and UO 2fuelto as ATF-1, began in 2014 to evaluateRidge National Laboratory (ORNL) fuelcladding compatibility andtargeting a range of burn-up values. provide irradiated material for futureOne of the three rodlets, ATF-18, was ATF testing. The irradiation includedirradiated to 10 GWd/MT at approxi-50 2021|AFC ACCOMPLISHMENTS'