About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
High-Performance Ni Alloys for Molten Salt Reactor Applications |
| Author(s) |
Ryan Thier, Qinyun Chen, Jay Tiley, Kumar Sridharan, Ryan Gordon, Vijay Vasudevan, Vilupanur Ravi, Steven J. Zinkle |
| On-Site Speaker (Planned) |
Jay Tiley |
| Abstract Scope |
Molten salt reactors (MSRs) are a promising option for small-modular to gigawatt-scale reactors intended for electricity and/or industrial high temperature heat applications. Current structural alloys based on Type 316 stainless steel or Hastelloy N Ni-base alloy are restricted to upper operating temperatures near 600C in MSRs due to salt corrosion and thermal creep issues, respectively. High temperature helium embrittlement of the grain boundaries of in-core structural components is also of concern at temperatures above ~600C. This presentation will summarize recent results on a series of commercial Ni alloys (Haynes 214, 244, 282 and Hastelloy C-276) and carbide- or gamma prime-strengthened developmental Ni alloys. Mechanical properties (tensile, thermal creep), ion irradiation phase stability and nanoindentation changes, and molten salt chemical compatibility will be compared with 316 stainless steel and Hastelloy N. Several of the high-performance alloys could potentially increase the upper use temperature above 700C, with significant technoeconomic impact. |
| Proceedings Inclusion? |
Planned: |