NSUF 18-1177: Atom probe tomography of fission gas bubble superlattice in U-Mo fuel
It has been postulated that bubble superlattice is an effective mechanism to accommodate the production of insoluble Xe and Kr fission gaseous atoms in irradiated U-Mo fuels without instigation of severe swelling. Despite the work conducted to this date the chemical composition, number density and volume fraction of these fission gas bubbles have not been systematically investigated. In this project, we will conduct a detailed microstructural characterization of the low burnup U-Mo fuel using atom probe tomography and investigate the effects of operating conditions in local electrode atom probe (LEAP) instrument. The consistency of data obtained from different grains will be investigated to determine if there are any variations in fission gas bubble superlattice within and across grains. The data obtained through this proposal will provide valuable information about the influence of heating in laser mode on data quality. The project is going to take a critical step towards determining the fundamental fuel performance characteristics of metallic fuels.
Additional Info
| Field | Value |
|---|---|
| Abstract | It has been postulated that bubble superlattice is an effective mechanism to accommodate the production of insoluble Xe and Kr fission gaseous atoms in irradiated U-Mo fuels without instigation of severe swelling. Despite the work conducted to this date the chemical composition, number density and volume fraction of these fission gas bubbles have not been systematically investigated. In this project, we will conduct a detailed microstructural characterization of the low burnup U-Mo fuel using atom probe tomography and investigate the effects of operating conditions in local electrode atom probe (LEAP) instrument. The consistency of data obtained from different grains will be investigated to determine if there are any variations in fission gas bubble superlattice within and across grains. The data obtained through this proposal will provide valuable information about the influence of heating in laser mode on data quality. The project is going to take a critical step towards determining the fundamental fuel performance characteristics of metallic fuels. |
| Award Announced Date | 2018-02-01T14:12:44.413 |
| Awarded Institution | None |
| Facility | None |
| Facility Tech Lead | Yaqiao Wu |
| Irradiation Facility | None |
| PI | Charlyne Smith |
| PI Email | [email protected] |
| Project Type | RTE |
| RTE Number | 1177 |