| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Surface Engineering VII
|
| Presentation Title |
Cold spray and peening surface treatment technologies for mitigating corrosion and SCC in stainless steel containments for used nuclear fuel storage |
| Author(s) |
Carson Lee Lukas, Evan Willing, JP Lacy, Nicholas Pocquette, Kasturi Sasidhar, Jonathon Tatman, Hwasung Yeom, Kumar Sridharan |
| On-Site Speaker (Planned) |
Carson Lee Lukas |
| Abstract Scope |
Used nuclear fuel (UNF) from light water reactors (LWR) is stored in dry cask storage systems (DCSS) consisting of arc-welded 300-series austenitic stainless-steel canisters placed in a concrete overpack. Material and environmental effects render the stainless-steel canister susceptible to corrosive attack. Chloride-induced stress corrosion cracking (CISCC) is a potential concern in the heat affected zone in the welds of canisters where environmental chlorine, sensitized microstructure, and corrosive pits combine to promote crack initiation. Surface modification by peening stands as a strong candidate for CISCC control. Peening technologies include waterjet and laser shock peening, and ultra-nanocrystalline surface modification (UNSM), while cold spray overlay coatings are based on nickel powders. We report the results of surface modification by peening technologies, overlay coatings by cold spray deposition, as well as hybrid treatments to improve corrosion resistance and mitigate CISCC initiation by introducing surface compressive stresses, influencing surface microstructure, and controlling galvanic material couples.
|
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Surface Modification and Coatings, Other |