b'Design of Irradiation Creep Tests for Coated and Composite CladdingPrincipal Investigator: Padhraic Mulligan, ORNLTeam Members/ Collaborators: Patrick Champlin, Andrew Nelson, Scarlett Clark, Christian Petrie, Alan Frederick, Kory Linton (ORNL) Dan Lutz, Sarah DeSilva, Yang-Pi Lin, Francis Bolger (GNF)Figure1. Pressurized rodlet assemblyA of coatings of various thicknesses and RMOR coated fuel cladding has used for irradiation in HFIR. the potential to delay the onsetproperties on cladding creep has not of hydrogen generation in lossbeen quantified. To accomplish this of coolant accident (LOCA) scenarios,measurement, thin-walled zirconium enabling greater safety margins inrodlets were fabricated for placement existing nuclear reactors. This workinside standard HFIR irradiation seeks to experimentally determine thecapsules. Rodlets are coated with impact of ARMOR coating on irradiationvarious thicknesses of Global Nuclear induced creep in biaxially stressed,Fuels (GNFs) coated cladding concept Zircaloy-2 rodlets in the High Flux(ARMOR) and internally pressurized Isotope Reactor (HFIR). to generate a circumferential hoop Project Description: stress in the rodlet wall. An embossed, Irradiation induced creep is a criticalcompressible zirconium foil surrounds mechanical phenomenon for materialsthe pressurized rodlet in the irradiation in nuclear applications. While thecapsule, maintaining a constant heat creep rate of standard zirconium fueltransfer path, and therefore constant cladding is well known, the impacttemperature, as the rodlets creep radially 100 2019|AFC ACCOMPLISHMENTS'