NSUF 19-1674: Radiation tolerance of Ln3TaO7 weberite-type nuclear waste matrix materials
In this project, 1 MeV Kr ions will be used to irradiate La3TaO7, Sm3TaO7, Gd3TaO7, Dy3TaO7 and Lu3TaO7 (up to 30 dpa) at 200 K, RT, 450 K, and 600 K to study the radiation tolerance and structural evolution in these nuclear waste form matrix materials. DF/BF images and SAED patterns will be collected at various fluences to observe the structural modifications induced, as well as the specific temperatures and ion fluences at which these modifications occur. In addition, ion irradiation-induced microstructural evolution, including defect evolution and phase transformations, will be compared among these weberite-type compounds. This project needs one-week of observation time at the IVEM facility. We anticipate observing the formation and evolution of defects, including point defects, dislocation loops, and stack faults, as well as phase transformation processes, as a function of fluence and temperature. By comparing the radiation responses of these compounds, we will obtain insight into the manner in which temperature and composition affect the radiation tolerance of weberite-type phases, thus helping to design radiation tolerant materials in this system for next generation nuclear waste matrices.
추가 정보
| 필드 | 값 |
|---|---|
| Abstract | In this project, 1 MeV Kr ions will be used to irradiate La3TaO7, Sm3TaO7, Gd3TaO7, Dy3TaO7 and Lu3TaO7 (up to 30 dpa) at 200 K, RT, 450 K, and 600 K to study the radiation tolerance and structural evolution in these nuclear waste form matrix materials. DF/BF images and SAED patterns will be collected at various fluences to observe the structural modifications induced, as well as the specific temperatures and ion fluences at which these modifications occur. In addition, ion irradiation-induced microstructural evolution, including defect evolution and phase transformations, will be compared among these weberite-type compounds. This project needs one-week of observation time at the IVEM facility. We anticipate observing the formation and evolution of defects, including point defects, dislocation loops, and stack faults, as well as phase transformation processes, as a function of fluence and temperature. By comparing the radiation responses of these compounds, we will obtain insight into the manner in which temperature and composition affect the radiation tolerance of weberite-type phases, thus helping to design radiation tolerant materials in this system for next generation nuclear waste matrices. |
| Award Announced Date | 2019-02-08T00:00:00 |
| Awarded Institution | None |
| Facility | None |
| Facility Tech Lead | Wei-Ying Chen |
| Irradiation Facility | None |
| PI | Rodney Ewing |
| PI Email | [email protected] |
| Project Type | RTE |
| RTE Number | 1674 |