NSUF 13-409: Electron Backscatter Diffraction and Atom Probe Tomography to Study Krypton Segregation Behavior in Uranium Dioxide
It is widely known that microstructural changes influence the thermal performance of nuclear fuels. One mechanism that plays a pivotal role in the microstructural evolution of fuel is the segregation behavior of insoluble fission products, such as krypton (Kr) in uranium dioxide (UO2) towards specific grain boundaries. Changes in the microstructure, specifically the addition of Kr, lead to a change in the efficiency of the transport of phonons or lattice vibrations. Micro level experiments are needed to help explain the role grain boundary character play on segregation behavior of Kr, which alter fuel chemistry and thus the thermal transport properties in UO2. The objective of this proposed research is to study the effect of grain boundary character on the microstructure of nuclear fuel. The goal is to elucidate the fundamental material-physics underlying the connection between the fission products segregation and microstructural evolution. The proposed research utilizes electron backscatter diffraction (EBSD) and atom probe tomography (APT) to study grain boundary dependent Kr segregation in polycrystalline UO2. In order to characterize grain boundary character and changes in concentration across the grain boundary of interest in UO2, electron backscatter diffraction (EBSD) in conjunction with atom probe tomography available at CAES will be used. Samples will be prepared by conventional techniques for EBSD. [1] Samples will be studied in early Spring 2013. Final results will then be published in peer- reviewed journal articles. It is expected that these results will provide new insight into the grain boundary character dependence on insoluble fission products (Kr) segregation in UO2, allowing for the correlation with atomic-level simulations and/or the ability to link with mesoscale structure-property relationships. References [1] P. V. Nerikar, et. al. J. Am. Ceram. Soc. 94 [6] 1893-1900 (2011)
Informație Adițională
| Cîmp | Valoare |
|---|---|
| Awarded Institution | University of Florida |
| Embargo End Date | 2026-02-27 |
| Facility Tech Lead | Alina Montrose, Jason Hou, Mukesh Bachhav |
| NSUF Call | FY 2013 RTE Solicitation |
| PI | Michele Manuel |
| Project Member | Indrajit Charit, Associate Professor - University of Idaho (https://orcid.org/0000-0002-3854-2900) |
| Project Member | Dr. Jian Gan, Research Scientist - Idaho National Laboratory (https://orcid.org/0000-0002-9121-4164) |
| Project Member | Dr. Michele Manuel, Professor and Chair - University of Florida (https://orcid.org/0000-0002-3495-7826) |
| Project Member | Billy Valderrama - University of Florida |
| Project Member | Hunter Henderson - University of Florida |
| Project Type | RTE |
| Publication | Effect of Grain Boundaries on Krypton Segregation Behavior in Irradiated Uranium Dioxide Todd Allen, Darryl Butt, Jian Gan, Lingfeng He, Hunter Henderson, Brian Jaques, Michele Manuel, Janne Pakarinen, Billy Valderrama Journal of Metals 66 2014-11-01 http://link.springer.com/article/10.1007%2Fs11837-014-1182-x |
| Publication | Bubble formation and Kr distribution in Kr-irradiated UO2 Todd Allen, Anter EL-AZAB, Jian Gan, Mahima Gupta, Andrew Nelson, Janne Pakarinen, Billy Valderrama, Lingfeng He, Hunter Henderson, Michele Manuel Journal of Nuclear Materials 456 2015-01-15 https://www.sciencedirect.com/science/article/pii/S0022311514006163#ak005 |
| Publication | Influence of instrument conditions on the evaporation behavior of uranium dioxide with UV laser-assisted atom probe tomography Jian Gan, Billy Valderrama, Hunter Henderson, Michele Manuel Journal of Nuclear Materials 459 2015-04-01 http://dx.doi.org/10.1016/j.jnucmat.2014.12.119 |
| RTE Number | 409 |