Characterization of the Microstructure of Irradiated U-Mo Dispersion Fuel with a Matrix that Contains Si

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RERTR U-Mo dispersion fuel plates are being developed for application in research reactors throughout the world. Of particular interest is the irradiation performance of U-Mo dispersion fuels with Si added to the Al matrix. Si is added to improve the performance of U-Mo dispersion fuels. Microstructural examinations have been performed on fuel plates with Al-2Si matrix after irradiation to around 50% LEU burnup. Si-rich layers were observed in many areas around the various U-7Mo fuel particles. In one local area of one of the samples, where the Si-rich layer had developed into a layer devoid of Si, relatively large fission ... continued below

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D. D. Keiser, Jr.; Robinson, A. B.; Jue, J. F.; Medvedev, P. & Finlay, M. R. March 1, 2009.

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RERTR U-Mo dispersion fuel plates are being developed for application in research reactors throughout the world. Of particular interest is the irradiation performance of U-Mo dispersion fuels with Si added to the Al matrix. Si is added to improve the performance of U-Mo dispersion fuels. Microstructural examinations have been performed on fuel plates with Al-2Si matrix after irradiation to around 50% LEU burnup. Si-rich layers were observed in many areas around the various U-7Mo fuel particles. In one local area of one of the samples, where the Si-rich layer had developed into a layer devoid of Si, relatively large fission gas bubbles were observed in the interaction phase. There may be a connection between the growth of these bubbles and the amount of Si present in the interaction layer. Overall, it was found that having Si-rich layers around the fuel particles after fuel plate fabrication positively impacted the overall performance of the fuel plate.

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  • Research Reactor Fuel Management Conference,Vienna, Austria,03/22/2009,03/25/2009

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  • Report No.: INL/CON-09-15489
  • Grant Number: DE-AC07-99ID-13727
  • Office of Scientific & Technical Information Report Number: 952017
  • Archival Resource Key: ark:/67531/metadc929102

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  • March 1, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • Jan. 4, 2017, 2:19 p.m.

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D. D. Keiser, Jr.; Robinson, A. B.; Jue, J. F.; Medvedev, P. & Finlay, M. R. Characterization of the Microstructure of Irradiated U-Mo Dispersion Fuel with a Matrix that Contains Si, article, March 1, 2009; [Idaho]. (digital.library.unt.edu/ark:/67531/metadc929102/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.