b'Figure 2. Parts layout for capsuleFigure 2 shows one capsule partsmeasurement technique was effective assembly of tensile cladding layout for irradiation of tensile tubeat capturing tube deformation on the tube specimens specimens. Post-irradiation the speci- micron scale and determining the mens will be examined for coatingirradiation creep rate in the tube speci-integrity evaluation and mechani- mens. It was observed that the coating cally tested to evaluate the neutrondoes not impact irradiation creep in Zr irradiation effects on specimenstubes. Future PIE may include passive with representative PWR claddingthermometry analysis via dilatometry geometry. Longer cladding specimensand depressurized tube diameters (about 102 mm long) were alsomeasurements to evaluation the change inserted into HFIR irradiation targetsin Youngs modulus after irradiation.(see parts layout in Figure 3). FourReferences:longer cladding specimens can be[1.] C.M. Petrie, J.R. Burns, A.M. inserted in a single target. PIE on suchRaftery, A.T. Nelson, K.A. Terrani, specimens can provide information onSeparate Effects Irradiation Test-thermal and mechanical fatigue anding of Miniature Fuel Specimens, burst behavior. Journal of Nuclear Materials, 526 (2019).Creep tube irradiation testingTo quantify irradiation creep on ATF[2.] J.M. Harp, R.N. Morris, C.M. cladding concepts and the effect ofPetrie, J.R. Burns, K.A. Terrani, coatings on standard cladding creep,Postirradiation Examination pressurized FeCrAl and coated Zr tubesfrom Separate Effects Irradiation specimens were inserted in HFIR. TheTesting of Uranium Nitride Ker-specimens were internally pressurizednels and Coated Particles, Journal to generate a hoop stress up to 180of Nuclear Materials, 544 (2021).MPa and were irradiated to 2 or 8 dpa[3.] J.P. Gorton, Z.G. Wallen, C.M. at temperatures representative of PWRPetrie, Modifications to MiniFuel cladding temperatures. Au automatedVehicle to Enable Higher Tempera-profilometer measurement system wasture UO2 Irradiation Capabilities, developed to allow diameter measure- ORNL/SPR-2021/2096, Oak ments of the pressurized tubes in theRidge National Laboratory, Oak hot cells. This low-cost and customRidge, TN, August 2021.156 2021|AFC ACCOMPLISHMENTS'