b'This experiment will provide the first quantitative measurement of irradiation induced creep in coated zircaloy, a critical parameter for NRC licensure.conditions on a reduced scale,thin-walled tubes and endcaps were compatible with the dimensionalmachined and electron beam welded at constraints of standard HFIR irradiationORNL, and subsequently ARMOR coated capsules. Finite element analysis modelsby GNF. Several methods capable of using HFIR specific heat generationmeasuring precise (<1 m) diameters rates and boundary conditions werepre- and post- irradiation were solved to determine irradiation capsuleidentified and will be used to quantify component dimensions for designdimensional changes in the rodlets. and safety purposes. Safety calculationsMicrostructure, tensile strength, and have been documented and aretexture measurements were performed under review for HFIR irradiation.at Oak Ridge National Laboratory Nominally high and low circumferential(ORNL) on the Zircaloy-2 barstock used hoop stress states in the thin-walledto fabricate rodlets. A separate out-of-zirconium rodlets were calculated frompile thermal creep test assembly was these models and used to determinedesigned by ORNL and is being installed pre-irradiation rodlet fill pressures.to determine ARMOR coating impact on Resistive forces caused by the embossedthermal creep.foil surrounding the rodlets were analyzed and compensated by increasing the rodlet internal pressure. Zirconium 2019|AFC ACCOMPLISHMENTS 103'