b'University-Led Investigations of Thermal-HydraulicBehavior of Accident Tolerant Fuel Materials Technical Point of Contacts: Colby Jensen and Daniel WachsTeam Members/ Collaborators: See individual project reportsFour university-led projects including 7 universities, 1 national laboratory, and 5 industry collaborators provide first investigations of two-phase heat transfer and critical heat flux for ATF materials.I n 2017, the Nuclear EnergySelected Highlights: Pool boiling University Program (NEUP)experiments have been performed awarded 4 proposals to investigateat atmospheric pressure on accident two-phase heat transfer and Criticaltolerant fuel cladding materials Heat Flux (CHF) for Accident Tolerant(Zirlo, Cr coated Zirlo, FeCrAl Fuel (ATF) materials. The projectscoated Zirlo, and Chemical Vapor worked closely to ensure complemen- Deposition(CVD)Silicon Carbide tary work in a exemplary manner.(SiC)) to evaluate Critical Heat Flux. All four NEUP projects will finish atSelected results are presented in Figure the end of this year, after providing2. Corrosion resistant coatings of first-of-a-kind insights and importantCr and FeCrAl alloy were deposited data that will support ATF needson flat Zirlo samples using cold moving forward. A detailed summaryspray technology. The as-prepared report for the collection of works wassamples after surface polishing were published last year INL/EXT-19-56455subjected to autoclave tests at 360 C [1]. Figure 1 presents an overview ofwater and 18.6 MPa for 360 hours to the project participants. The followingsimulate prototypic corrosion of the provides a summary of the primaryATF clad materials in an a light water accomplishments of each project. reactor (LWR). Surface characteristics Project Description: potentially influencing CHF such as Project 17-12549 surface morphology, roughness, static contact angle, and surface chemistry Title: Pool Boiling CHF Studies ofwere characterized using a suite of ATF Cladding Materials with Highcharacterization methods including Temperature Water Corrosion scanning electron microscopy (SEM), Investigators: M. Corradini, H. Yeom,3D optical profilometry, optical E. Gutierrez, K. Mondry, K. Sridharan,contact angle measurements, and x-ray H. Jo (now Pohang University ofphotoelectron spectroscopy. Thermo-Science and Technology, University ofphysical properties of the samples Wisconsin-Madison), P. Xu (now Idahosuch as density, thermal conductivity, National Laboratory) andW. Byers and heat capacity were also measured. (Westinghouse Electric Company). Polished FeCrAl coatings showed 38 2020|AFC ACCOMPLISHMENTS'