|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Coatings and Surface Engineering for Environmental Protection II
||Evaluation of Surface Characteristics of Cr-coated Zr-4 Accident Tolerant Fuel Cladding Material after Critical Heat Flux Testing under Atmospheric Pressure
||Rajnikant Umretiya, Jessika Rojas, Mark Anderson, Barret Elward, Raul B Rebak, Sama Bilbao y Leon
|On-Site Speaker (Planned)
Fuels with enhanced accident tolerance are those that, in comparison with the current UO2 – zirconium alloy fuel system, can tolerate a loss of active cooling in the reactor core for a considerably longer amount of time, while maintaining, or improving the fuel performance during normal operations and operational transients. Preliminary studies for the proposed ATF concepts indicate their cladding surface characteristics may result in substantial impacts in their Critical Heat Flux (CHF) behavior. In this work, the surface characteristics of ATF cladding tubes of Cr-coated Zircaloy-4 before and after CHF testing were investigated. Before CHF test, surface of Cr-coated sample gives a rougher appearance with 10% of increase in average surface roughness (Ra) measured by contact profilometry and qualitatively confirmed using AFM and SEM. Static and dynamic contact angle were assessed using goniometer. Additionally, the surface chemistry was investigated before and after flow boiling test using X-Ray Photoelectron Spectroscopy.
||Planned: Supplemental Proceedings volume