| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability in Extreme Environments
|
| Presentation Title |
Effect of Dose Rate and Composition on the Precipitation Behavior of RPV Steels |
| Author(s) |
Anshul Kamboj, Nathan Almirall, Emmanuelle A Marquis, G. Robert Odette |
| On-Site Speaker (Planned) |
Anshul Kamboj |
| Abstract Scope |
Life extension of light water reactors require that reactor pressure vessels (RPVs) operate within the safety margins of embrittlement under long-term irradiation. The embrittlement results from nanoscale precipitate phases consisting of Cu, Mn, Ni, and Si. Studying the evolution of these phases under actual operating environment is time and cost intensive due to the low neutron dose rate. Therefore, relatively higher dose rate neutrons in test reactors and ion irradiation are often used to study irradiation effects. However, dose rates can significantly influence precipitate evolution and hence the understanding of microstructural evolution as alloy composition as a function of flux is required. Therefore, we studied two sets of six different RPV steel samples with varying Cu and Ni irradiated using medium flux ions (10^-5&10^-6dpa/s) and relatively low flux neutrons (10^-9dpa/s). Atom probe tomography characterization revealed a significant effect of dose rate on precipitate number density, size, volume fraction, and morphology. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, Iron and Steel |