|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors VII
||Examining the Effects of Neutron Irradiation on Zirconium-alloy Oxide Film Microstructure Using Focused Ion Beam Techniques
||Gene Lucadamo, John Seidensticker, Ram Bajaj, Arash Parsi, Jesse J. Carter
|On-Site Speaker (Planned)
Zirconium alloys are used extensively by the nuclear industry. It is well known that exposure of Zr-alloys to high-temperature water produces an oxide film with a complex microstructure containing cracks and porosity. We report results obtained from FIB serial-section tomography of oxide films grown on Zircaloy-4 in the Advanced Test Reactor (ATR) as a function of temperature, neutron flux and neutron fluence. The nature of these cracks and associated nanoscale porosity are important to understand the evolution of stresses in the oxide and the mechanisms related to the initiation of the kinetic transition. Furthermore, the evolving porosity in the oxide film can affect the transport of oxygen ions and electrons, in addition to film thermal conductivity and possible radiolysis effects that are present in-reactor. Data acquired from oxides that were formed in the ATR under irradiation are compared with previous results obtained from oxides grown in an autoclave environment.
||Planned: Supplemental Proceedings volume