Vaporization of actinide oxides in thermal treatment processes for mixed waste

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The purpose of this study is to evaluate the volatilities of U, Pu, and Am in thermal treatment processes for mixed wastes. The thermodynamics of vaporization U and Pu oxides in the presence of oxygen and water vapor and of U oxide in the presence of oxygen and chlorine were studied. Experimental studies of U oxide volatilities by previous authors have also been reviewed. For species where data are unavailable estimation methods were used to obtain free energies of formation of the gaseous species, The data are applied to thermal treatment processes in general and then more specifically to conditions ... continued below

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26 p.

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Ebbinghaus, B. B.; Krikorian, O. H. & Adamson, M. G. October 4, 1994.

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Description

The purpose of this study is to evaluate the volatilities of U, Pu, and Am in thermal treatment processes for mixed wastes. The thermodynamics of vaporization U and Pu oxides in the presence of oxygen and water vapor and of U oxide in the presence of oxygen and chlorine were studied. Experimental studies of U oxide volatilities by previous authors have also been reviewed. For species where data are unavailable estimation methods were used to obtain free energies of formation of the gaseous species, The data are applied to thermal treatment processes in general and then more specifically to conditions representative of the Rocky Flats Plant Fluidized Bed Unit. (RFP FBU), molten salt oxidizer, and an incinerator. U volatilities are greatest ranging from 2.67 x 10{sup -7} gU/h in the RFP FBU to 4. 00 gU/h for typical incinerator conditions. Pu volatilities are almost 5 orders of magnitude less than U and Am volatilities are about 3 orders of magnitude less than Pu.

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26 p.

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INIS; OSTI as DE96050350

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  • Materials week `94, Rosemont, IL (United States), 3-7 Oct 1994

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  • Other: DE96050350
  • Report No.: UCRL-JC--116414
  • Report No.: CONF-941016--9
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 371419
  • Archival Resource Key: ark:/67531/metadc677332

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  • October 4, 1994

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  • July 25, 2015, 2:20 a.m.

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  • June 27, 2016, 12:29 p.m.

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Ebbinghaus, B. B.; Krikorian, O. H. & Adamson, M. G. Vaporization of actinide oxides in thermal treatment processes for mixed waste, article, October 4, 1994; California. (digital.library.unt.edu/ark:/67531/metadc677332/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.