About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Qualification Methods for Nuclear Reactor Structural Materials
|
| Presentation Title |
Closing the Gap Between Neutron and Ion Irradiations |
| Author(s) |
Lin Shao |
| On-Site Speaker (Planned) |
Lin Shao |
| Abstract Scope |
Ion irradiation is widely used as a surrogate for simulating reactor neutron irradiation due to its lower cost and higher damage rates. However, accurately achieving damage equivalence requires a thorough understanding of dose rate effects. This demands an integrated approach combining damage simulations, rate theory, and void nucleation modeling. Current temperature shift models overlook spatial imbalances in defect distributions—ion irradiation produces excess vacancies near the surface and excess interstitials at deeper depths—necessitating additional temperature adjustments. Moreover, achieving flux equivalence during the void nucleation stage is more critical than during void growth, as it strongly influences the swelling incubation period. In this talk, we present recent progress toward an integrated modeling framework to bridge the gap between neutron and ion irradiation. The framework also considers artifacts such as surface void-denuded zones and defines safe analysis regions under various irradiation conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Modeling and Simulation, Characterization |