NSUF 17-929: Radiation Stability Study on Nuclear Waste/Spent Fuel Materials
Since radiation damage and decay heat are significant issues for nuclear waste and spent fuel, the purpose of our study is to examine the long-term radiation stability of nuclear waste materials, as the material is subjected to self-radiation damage and elevated temperature due to decay heat. In this investigation, we propose to study radiation damage evolution in single phase nuclear waste materials including hollandite (A2+B3+2C4+6O16), powellite (A2+B6+O4), oxyapatite (A2Ln8Si6O26) phases. We are particularly interested in radiation-induced amorphous transformations as a function of temperature. During our previous IVEM experiments and bulk ion implantation experiments at LANL, we have previously found an ion implantation-induced amorphization in Cr-hollandite (BaCs0.3Cr2.3Ti5.7O16). The amorphization dose at room temperature is ~ 3×1014 ions/cm2 using 1 MeV Kr. The focus of the proposed work at the IVEM-Tandem Facility at Argonne National Laboratory, is to examine the irradiation-induced phase transformations described above via in-situ transmission electron microscopy (in-situ TEM using the Hitachi H-9000 TEM) and specifically by selected-area electron diffraction (SAED) while irradiating with 1.0 MeV Kr++ ions. Ion irradiations will be used to simulate self-radiation in nuclear wastes or spent fuels. The choice of ion mass and energy are based on convenience for the ion accelerator at the IVEM-Tandem facility, as well as to ensure that the majority of incident ions pass all the way through the TEM thin foil, so that any transformations observed can be attributed to radiation damage and not to an implanted ion effect. Transformations will be analyzed over the temperature range of 30 – 600 K, in order to determine the critical dose for amorphization as a function of temperature.
Additional Info
| Field | Value |
|---|---|
| Abstract | Since radiation damage and decay heat are significant issues for nuclear waste and spent fuel, the purpose of our study is to examine the long-term radiation stability of nuclear waste materials, as the material is subjected to self-radiation damage and elevated temperature due to decay heat. In this investigation, we propose to study radiation damage evolution in single phase nuclear waste materials including hollandite (A2+B3+2C4+6O16), powellite (A2+B6+O4), oxyapatite (A2Ln8Si6O26) phases. We are particularly interested in radiation-induced amorphous transformations as a function of temperature. During our previous IVEM experiments and bulk ion implantation experiments at LANL, we have previously found an ion implantation-induced amorphization in Cr-hollandite (BaCs0.3Cr2.3Ti5.7O16). The amorphization dose at room temperature is ~ 3×1014 ions/cm2 using 1 MeV Kr. The focus of the proposed work at the IVEM-Tandem Facility at Argonne National Laboratory, is to examine the irradiation-induced phase transformations described above via in-situ transmission electron microscopy (in-situ TEM using the Hitachi H-9000 TEM) and specifically by selected-area electron diffraction (SAED) while irradiating with 1.0 MeV Kr++ ions. Ion irradiations will be used to simulate self-radiation in nuclear wastes or spent fuels. The choice of ion mass and energy are based on convenience for the ion accelerator at the IVEM-Tandem facility, as well as to ensure that the majority of incident ions pass all the way through the TEM thin foil, so that any transformations observed can be attributed to radiation damage and not to an implanted ion effect. Transformations will be analyzed over the temperature range of 30 – 600 K, in order to determine the critical dose for amorphization as a function of temperature. |
| Award Announced Date | 2017-04-26T10:15:12.71 |
| Awarded Institution | None |
| Facility | None |
| Facility Tech Lead | Wei-Ying Chen |
| Irradiation Facility | None |
| PI | Ming Tang |
| PI Email | [email protected] |
| Project Type | RTE |
| RTE Number | 929 |