| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Radiation Effects in Metals and Ceramics
|
| Presentation Title |
Understanding the Effect of Gamma Radiation on the Corrosion of Zirconium Alloys |
| Author(s) |
Choen-May Chan, Paul Binks, Douglas Rishel, Aliaksandr Baidak |
| On-Site Speaker (Planned) |
Choen-May Chan |
| Abstract Scope |
Gamma radiation is suspected of playing a contributing role in accelerating the in-reactor post-transition corrosion kinetics of zirconium alloys such as Zircaloy-4. Previous work has shown that it is possible to infer the role of gamma radiation on corrosion by comparing instances where variations exist in gamma flux levels relative to neutron flux levels within different regions of a reactor or from one reactor to another reactor. To definitively determine whether gamma radiation plays a role in zirconium alloy corrosion, electrochemistry tests have been conducted using a mini-autoclave situated in the gamma irradiator at the Dalton Cumbrian Facility at dose rates ranging from 22 to 37 Gy/min under PWR water chemistry conditions using Zircaloy-4 working electrodes with pre-transition and post-transition thick oxide films. Data from open circuit potential measurements and electrochemical impedance spectroscopy will be presented that support the hypothesis that gamma radiation impacts corrosion under post-transition conditions. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |