|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Coatings and Surface Engineering for Environmental Protection II
||Surface Characterization of FeCrAl Accident Tolerant Fuel Cladding Material After Flow Boiling Testing Under Atmospheric Pressure
||Rajnikant Umretiya, Jessika Rojas, Mark Anderson, Barret Elward, Raul B. Rebak, Sama Bilbao y Leon
|On-Site Speaker (Planned)
Accident Tolerant Fuels are defined as nuclear fuels that can withstand the loss of active cooling in the core for a considerably longer period of time (and the higher resultant temperatures) than the current UO2/Zr-based cladding fuel system, offering improved coping time under accident conditions. The Critical Heat Flux (CHF) is an important aspect of the thermal hydraulic performance that needs to be investigated to establish safety and operational margins, where materials’ surface parameters have evidence to affect it. This work investigated the surface characteristics of several FeCrAl alloy ATF candidates before and after flow boiling experiments. Roughness parameters were measured by contact profilometry as well as AFM and SEM. After CHF tests the average static contact angle of the specimen dropped by 23% that was confirmed by the liquid spreading method. Furthermore, changes in surface characteristics after CHF testing were conducted through XPS, SEM and EDS, evidencing oxide formation.
||Planned: Supplemental Proceedings volume