|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accident Tolerant Fuels for Light Water Reactor
||ZrSiO4 as an Efficient Barrier Coating for Nuclear Applications
||sumit Bhattacharya, Michael Pellin, Abdellatif Yacout
|On-Site Speaker (Planned)
ZrSiO4 thin film coating via atomic layer deposition (ALD) is proposed as oxidation barrier for both cladding and fuel materials in LWR environment. Corrosion resistance of both zirconium based cladding during normal operations, and advanced LWR fuel, e.g. U3Si2, during accident conditions can be improved using this coating. Three critical design parameters are identified for achieving optimum barrier on those fuel and cladding materials. First, optimization of bonding between coating and substrate is required, followed by the optimum film thickness, and finally developing a stoichiometric coating with a crystalline structure. This study shows that an interlayer of alumina is essential for achieving ALD coating thickness >1 micron for better bonding. Two micrometers film thickness is found to be ideal based on recent autoclave test results. TEM and SEM studies established that coating has Zr: Si ratio close to the ideal chemistry, and confirmed film structure to be ultra nano crystalline.
||Planned: Supplemental Proceedings volume