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Balart, S., Bruzzoni, P., Granovsky, M., Gribaudo, L., Hermida, J., Ovejero, J., Rubiolo, G. and Vicente, E. (2000) U-Mo Alloy Power Obtained by a Hydride-Dehydride Process. Proceedings of the International Meeting on Reduced Enrichment for Research and Test Reactors, Las Vegas, 1-6 October 2000, 6 p.

has been cited by the following article:

• TITLE: Relation between Gamma Decomposition and Powder Formation of γ-U8Mo Nuclear Fuel Alloys via Hydrogen Embrittlement and Thermal Shock

  AUTHORS: Fábio Branco Vaz de Oliveira, Delvonei Alves de Andrade

  KEYWORDS: Nuclear Fuel Alloys, Hydrogen Embrittlement, Thermal Shock

  JOURNAL NAME: World Journal of Nuclear Science and Technology, Vol.4 No.4, October 8, 2014

  ABSTRACT: Gamma uranium-molybdenum alloys have been considered as the fuel phase in plate type fuel elements for material and test reactors (MTR), due to their acceptable performance under irradiation. Regarding their usage as a dispersion phase in aluminum matrix, it is necessary to convert the as cast structure into powder, and one of the techniques considered for this purpose is the hydration-dehydration (HDH). This paper shows that, under specific conditions of heating and cooling, γ-UMo fragmentation occurs in a non-reactive predominant mechanism, as shown by the curves of hydrogen absorption/desorption as a function of time and temperature. Our focus was on the experimental results presented by the addition of 8% weight molybdenum. Following the production by induction melting, samples of the alloys were thermally treated under a constant flow of hydrogen for temperatures varying from 500°C to 600°C and for times of 0.5 to 4 h. It was observed that, even without a massive hydration-dehydration process, the alloys fragmented under specific conditions of thermal treatment during the thermal shock phase of the experiments. Also, it was observed that there was a relation between absorption and the rate of gamma decomposition or the gamma phase stability of the alloy.