About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
UF₄/UF₃ Redox Control in NaF-KF-UF₄ Systems |
| Author(s) |
Amanda Leong, Jinsuo Zhang |
| On-Site Speaker (Planned) |
Amanda Leong |
| Abstract Scope |
Redox control is key to mitigating corrosion of structural materials in molten salt reactors (MSR). This work discusses the use of UF₄/UF₃ couple to control corrosion in MSR, where UF₃ is used to consume oxidant, thus inhibiting the dissolution of structural materials such as chromium. However, elevated UF₃ levels cause the formation of uranium carbides. Therefore, this work presents the upper and lower limits of UF₄/UF₃ in NaF-KF-UF₄ systems, dictated by the dissolution of chromium and the formation of uranium carbides. The UF₄/UF₃ concentrations are determined through a series of equilibrium tests at 600 - 750°C. The upper limit is determined based on the equilibrium quotient (Keq) with CrF₂, while the formation of UC₂ determines the lower limit. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, Other |