THE EFFECT OF IRRADIATION ON THE HYDROLYSIS OF URANIUM CARBIDES. I. PREPARATION OF URANIUM MONOCARBIDE PELLETS FOR IRRADIATION

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The effect of irradiation on the hydrolytic behavior of uranium monocarbide as related to the aqueous chemical processing of these reactor fuels is being investigated. The fabrication, evaluation, and encapsulation of the UC in niobium prior to irradiation is described. Uranium monocarbide buttons were prepared by arc-melting 1.51%enriched uranium metal with the stoichiometric quantity of spectroscopic-grade carbon. The buttons were then remelted and drop- cast into graphite thimbles 3/8 in. dia, and 3 in. long. The cylindrical castings were surface ground and cut into 0.17 in.-thick pellets, which were then polished. Preirradiation evaluation included metallography, chemical analysis, and hydrolysis studies. ... continued below

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Pages: 31

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Bradley, M.J.; Ferris, L.M.; Hikido, T. & Ullmann, J.W. April 1, 1963.

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Description

The effect of irradiation on the hydrolytic behavior of uranium monocarbide as related to the aqueous chemical processing of these reactor fuels is being investigated. The fabrication, evaluation, and encapsulation of the UC in niobium prior to irradiation is described. Uranium monocarbide buttons were prepared by arc-melting 1.51%enriched uranium metal with the stoichiometric quantity of spectroscopic-grade carbon. The buttons were then remelted and drop- cast into graphite thimbles 3/8 in. dia, and 3 in. long. The cylindrical castings were surface ground and cut into 0.17 in.-thick pellets, which were then polished. Preirradiation evaluation included metallography, chemical analysis, and hydrolysis studies. Microstructures of the final pellets indicated that the monocarbide was nearly stoichiometric; however, some alpha -uranium was present along with carbon contamination from the graphite thimbles. The use of tungsten- tipped electrodes in the arc-melting operation introduced about 0.3% of tungsten impurity. The composition of the pellets, as estimated from hydrolysis studies and chemical analyses was 92% UC, 3.5% UC/sub 2/, 4.0% uranium metal, and 0.3% WC. The UC pellets were encapsulated in niobium and subsequently shrunk-fit into a stainless steel cladding. The capsules were sealed by heliarc welding in a helium atmosphere chamber. (auth)

Physical Description

Pages: 31

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  • Other Information: Orig. Receipt Date: 31-DEC-63

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  • Report No.: ORNL-3403
  • Grant Number: W-7405-ENG-26
  • DOI: 10.2172/4730509 | External Link
  • Office of Scientific & Technical Information Report Number: 4730509
  • Archival Resource Key: ark:/67531/metadc1027788

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • April 1, 1963

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  • Oct. 18, 2017, 7:39 a.m.

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  • Oct. 23, 2017, 3:28 p.m.

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Bradley, M.J.; Ferris, L.M.; Hikido, T. & Ullmann, J.W. THE EFFECT OF IRRADIATION ON THE HYDROLYSIS OF URANIUM CARBIDES. I. PREPARATION OF URANIUM MONOCARBIDE PELLETS FOR IRRADIATION, report, April 1, 1963; Oak Ridge, Tennessee. (digital.library.unt.edu/ark:/67531/metadc1027788/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.