| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Radiation-decelerated Corrosion of Nuclear Structural Materials in Gen IV Reactor Environments |
| Author(s) |
Weiyue Zhou, Nouf Mousa AlMousa, Kevin B Woller, Guiqiu (Tony) Zheng, Yang Yang, Michael Lastovich, Ryan M Schoell, Peter W Stahle, Angus Wilkinson, Michael Moody, Andrew M Minor, Tom Mark Lapington, Felix Hofmann, Djamel Kaoumi, Michael Philip Short |
| On-Site Speaker (Planned) |
Michael Philip Short |
| Abstract Scope |
The effects of ionizing radiation on materials often reduce to “bad news.” Radiation damage usually leads to detrimental effects, including radiation-accelerated corrosion. However, we have discovered a subset of conditions, practically useful for nuclear structural materials, where radiation damage decelerates corrosion. For example, proton irradiation decelerates intergranular corrosion of Ni-Cr model alloys and Ni-rich commercial alloys in molten fluoride salt at 600-700°C. We demonstrate this by showing that the depth of intergranular voids resulting from Cr leaching into the salt is reduced by proton irradiation alone. Radiation enhanced diffusion more rapidly replenishes corrosion-injected vacancies with alloy constituents, playing the crucial role in decelerating corrosion. Analogous results for steels in molten lead will also be shown in this talk. Only such fully coupled experiments can show that irradiation can have a positive impact on materials performance, challenging our view that radiation damage always results in negative effects. |
| Proceedings Inclusion? |
Undecided |