Transmission electron microscopy investigation of UALx based MTR fuel

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High enriched, low density UAlx dispersion fuel has been successfully used in research and test reactors for several decades. However, publications of detailed post irradiation examinations are limited. In this paper, a sample of a high enriched uranium fuel plate (90% 235U enriched UAlx fuel dispersed in an Al matrix), irradiated to a burn-up of 21% 235U, is investigated with transmission electron microscopy. It is observed that the fuel became completely amorphous during irradiation. The Al matrix is found to remain crystalline and contains a large number of radiation induced defects. Neither in the fuel nor in the Al matrix, fission gas bubbles were observed.


Original languageEnglish
Title of host publicationTransactions RRFM
Place of PublicationBrussels, Belgium
Publication statusPublished - Mar 2010
EventRRFM 2010 - 14th ENS Topical Meeting on Research Reactor Fuel Management - European Nuclear Society, Marrakech, Morocco
Duration: 21 Mar 201025 Mar 2010


ConferenceRRFM 2010 - 14th ENS Topical Meeting on Research Reactor Fuel Management
Internet address


  • UAlx, dispersion fuel, transmission electron microscopy, amorphisation

ID: 352087