NSUF 19-1663: Ion irradiation of ThO2 and UO2 single crystals
The technical objective of this RTE is to generate dislocation loop dominated microstructure in two model oxide fuels, ThO2 and UO2 . Single crystals will be irradiated using 2 MeV protons at high temperature at Texas A&M University. These irradiation conditions provide relatively uniform damage profile over several micrometers depths suitable for subsequent thermal transport measurements. Following the ion irradiation, quantitative analysis of radiation induced dislocation loops including size and density will be performed using transmission electron microscope (TEM) at Idaho National Laboratory (INL). The TEM samples will be prepared using focused ion beam (FIB) system at INL. After completion of this RTE, the thermal transport of irradiated ThO2 and UO2 crystals will be measured using modulated thermoreflectance technique at either The Ohio State University (OSU) or INL. These results will be used to establish relationship between dislocation loops and thermal conductivity in ThO2 and UO2 crystals.
Additional Info
| Field | Value |
|---|---|
| Abstract | The technical objective of this RTE is to generate dislocation loop dominated microstructure in two model oxide fuels, ThO2 and UO2 . Single crystals will be irradiated using 2 MeV protons at high temperature at Texas A&M University. These irradiation conditions provide relatively uniform damage profile over several micrometers depths suitable for subsequent thermal transport measurements. Following the ion irradiation, quantitative analysis of radiation induced dislocation loops including size and density will be performed using transmission electron microscope (TEM) at Idaho National Laboratory (INL). The TEM samples will be prepared using focused ion beam (FIB) system at INL. After completion of this RTE, the thermal transport of irradiated ThO2 and UO2 crystals will be measured using modulated thermoreflectance technique at either The Ohio State University (OSU) or INL. These results will be used to establish relationship between dislocation loops and thermal conductivity in ThO2 and UO2 crystals. |
| Award Announced Date | 2019-02-08T00:00:00 |
| Awarded Institution | None |
| Facility | None |
| Facility Tech Lead | Alina Zackrone, Lin Shao |
| Irradiation Facility | None |
| PI | Marat Khafizov |
| PI Email | [email protected] |
| Project Type | RTE |
| RTE Number | 1663 |