NSUF 19-1693: EBSD characterization of neutron irradiated mineral concrete aggregates
The Radiation Induced Volumetric Expansion (RIVE) may produce cracking and damage on the radiological concrete shield of Light Water Reactors (LWRs). One of the primary goals of the DOE Light-Water Reactor Sustainability (LWRs) program is to develop robust simulations that predict the damage caused by the neutron irradiation in concrete. Concrete, aggregates and cement paste samples irradiated at the JEEP II reactor Norway’s Institute for Energy Technology (IFE) by the Japan Concrete Aging Management Program (JCAMP) are unique specimens because these are the only samples that have been irradiated to similar conditions found in a LWR power station. It is believed that the RIVE effect will cause cracking and debonding between the aggregate and cement paste phases due to the changes of microstructure in the aggregate phases and their grain structure. The work to be conducted under the proposed research will use state-of-the-art instruments that combine Electron Backscatter Diffraction (EBSD) microscopy and Energy-dispersive X-ray Spectroscopy (EDS) to characterize the neutron irradiation growth of different minerals. Furthermore, the combined effect of neutron irradiation and different orientation crystallites within the same mineral is un-known. This novel research will help to quantify these effects by comparing the mineral and grain size of unirradiated and irradiated minerals. The results obtained will further increase the knowledge of the formation of strain and stresses produced by complex microstructures in irradiated aggregates. This research will also provide the first experimental comparisons and validations for computation modelling of irradiation effects in concrete aggregates. This research is expected to be completed within 6 months from the start of the project, including sample preparation, data acquisition, and analysis.
추가 정보
| 필드 | 값 |
|---|---|
| Abstract | The Radiation Induced Volumetric Expansion (RIVE) may produce cracking and damage on the radiological concrete shield of Light Water Reactors (LWRs). One of the primary goals of the DOE Light-Water Reactor Sustainability (LWRs) program is to develop robust simulations that predict the damage caused by the neutron irradiation in concrete. Concrete, aggregates and cement paste samples irradiated at the JEEP II reactor Norway’s Institute for Energy Technology (IFE) by the Japan Concrete Aging Management Program (JCAMP) are unique specimens because these are the only samples that have been irradiated to similar conditions found in a LWR power station. It is believed that the RIVE effect will cause cracking and debonding between the aggregate and cement paste phases due to the changes of microstructure in the aggregate phases and their grain structure. The work to be conducted under the proposed research will use state-of-the-art instruments that combine Electron Backscatter Diffraction (EBSD) microscopy and Energy-dispersive X-ray Spectroscopy (EDS) to characterize the neutron irradiation growth of different minerals. Furthermore, the combined effect of neutron irradiation and different orientation crystallites within the same mineral is un-known. This novel research will help to quantify these effects by comparing the mineral and grain size of unirradiated and irradiated minerals. The results obtained will further increase the knowledge of the formation of strain and stresses produced by complex microstructures in irradiated aggregates. This research will also provide the first experimental comparisons and validations for computation modelling of irradiation effects in concrete aggregates. This research is expected to be completed within 6 months from the start of the project, including sample preparation, data acquisition, and analysis. |
| Award Announced Date | 2019-02-08T00:00:00 |
| Awarded Institution | None |
| Facility | None |
| Facility Tech Lead | Kory Linton |
| Irradiation Facility | None |
| PI | Thomas Rosseel |
| PI Email | [email protected] |
| Project Type | RTE |
| RTE Number | 1693 |