NSUF 22-4435: In-situ TEM Ion Implantation Characterization on Helium Bubble Formation in Iron-Phosphate Nuclear Waste Glass Immobilizing Salt Waste Streams
Technical Abstract: Radiation stability is one of the important concerns for nuclear waste materials development and management. During nuclear waste storage, helium (He) atoms will accumulate as a result of the capture of two electrons by alpha-particles, and He concentration will increase with cumulative dose from alpha-decay events. At increased concentrations, it may form bubbles, which can cause swelling, microcracking and affect many of the physical properties of the nuclear waste materials. However, very few studies have been done to evaluate the radiation-induced formation of defects and microscopic evolution in phosphate glasses and none of these studies have been directed at the types of compositions to be expected from treating or immobilizing salt streams from electrochemical reprocessing or molten salt reactors. The proposed work at the IVEM-Tandem Facility at Argonne National Laboratory, is to examine helium irradiation induced bubble formation and the synergistic effect of He and Kr irradiations in phosphate glass waste forms via in-situ transmission electron microscopy (in-situ TEM using the Hitachi H-9000 TEM) while irradiating with 1.0 MeV Kr++ and 5-20 keV He ions simultaneously or sequentially. The focus will be on helium irradiation-induced bubble nucleation and growth in iron-phosphate glass.
Additional Info
| Field | Value |
|---|---|
| Abstract | Technical Abstract: Radiation stability is one of the important concerns for nuclear waste materials development and management. During nuclear waste storage, helium (He) atoms will accumulate as a result of the capture of two electrons by alpha-particles, and He concentration will increase with cumulative dose from alpha-decay events. At increased concentrations, it may form bubbles, which can cause swelling, microcracking and affect many of the physical properties of the nuclear waste materials. However, very few studies have been done to evaluate the radiation-induced formation of defects and microscopic evolution in phosphate glasses and none of these studies have been directed at the types of compositions to be expected from treating or immobilizing salt streams from electrochemical reprocessing or molten salt reactors. The proposed work at the IVEM-Tandem Facility at Argonne National Laboratory, is to examine helium irradiation induced bubble formation and the synergistic effect of He and Kr irradiations in phosphate glass waste forms via in-situ transmission electron microscopy (in-situ TEM using the Hitachi H-9000 TEM) while irradiating with 1.0 MeV Kr++ and 5-20 keV He ions simultaneously or sequentially. The focus will be on helium irradiation-induced bubble nucleation and growth in iron-phosphate glass. |
| Award Announced Date | 2022-06-14T07:29:06.233 |
| Awarded Institution | None |
| Facility | None |
| Facility Tech Lead | Wei-Ying Chen |
| Irradiation Facility | Intermediate Voltage Electron Microscopy (IVEM)-Tandem Facility |
| PI | Ming Tang |
| PI Email | [email protected] |
| Project Type | RTE |
| RTE Number | 4435 |