b'Disc Irradiation for Separate Effects Testing withControl of Temperature (DISECT)Principal Investigator: W.J. Williams and D.M. Wachs (INL)Team Members/ Collaborators: C. Hale, M. Sprenger, T. Maddock, F. Di Lemma and L. Sudderth (INL)Figure 1. Moderate magnification backscatter SEM images of the low enriched U-10wt.%Zr following a two hour anneal at 900C and a cooling rate of 60C/hr.T he Disc Irradiation for SeparateLaboratory (INL). The test vehicle Effects Testing with Controlallows for the decoupling of fission of Temperature (DISECT)rate, fission density, temperature, experiment is an Advanced Fuelsand composition, something not Campaign (AFC) guided separateachievable in integral fuel tests. Fresh effects study centered uponU-Zr foils have been characterized the characterization of variousand are awaiting irradiation in 2020 U-Xwt.%Zr alloys, (X=6, 10, 20, andin the BR2 reactor. Characterization 30). The experiment utilizes a novelincludes Scanning Electron instrumented test vehicle designed byMicroscopy (SEM), Transmission the United States (US) DepartmentElectron Microscopy (TEM), of Energy (DOE) Office of Nuclearchemistry, and neutron diffraction. Energy(NE) Nuclear Science UserThe separate effect testing is intended Facilities (NSUF) in conjunction withto provide a more comprehensive the Belgian Nuclear Research Centreunderstanding of in-pile behavior (Studiecentrum voor Kernenergieto facilitate the transition from (SCKCEN)) and Idaho Nationalempirical to mechanistic modeling and simulation. 208 2019|AFC ACCOMPLISHMENTS'