Fundamental Thermodynamics of Actinide-Bearing Mineral Waste Forms - Final Report

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The end of the Cold War raised the need for the technical community to be concerned with the disposition of excess nuclear weapon material. The plutonium will either be converted into mixed-oxide fuel for use in nuclear reactors or immobilized in glass or ceramic waste forms and placed in a repository. The stability and behavior of plutonium in the ceramic materials as well as the phase behavior and stability of the ceramic material in the environment is not well established. In order to provide technically sound solutions to these issues, thermodynamic data are essential in developing an understanding of the ... continued below

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Williamson, Mark A.; Ebbinghaus, Bartley B. & Navrotsky, Alexandra March 1, 2001.

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Description

The end of the Cold War raised the need for the technical community to be concerned with the disposition of excess nuclear weapon material. The plutonium will either be converted into mixed-oxide fuel for use in nuclear reactors or immobilized in glass or ceramic waste forms and placed in a repository. The stability and behavior of plutonium in the ceramic materials as well as the phase behavior and stability of the ceramic material in the environment is not well established. In order to provide technically sound solutions to these issues, thermodynamic data are essential in developing an understanding of the chemistry and phase equilibria of the actinide-bearing mineral waste form materials proposed as immobilization matrices. Mineral materials of interest include zircon, zirconolite, and pyrochlore. High temperature solution calorimetry is one of the most powerful techniques, sometimes the only technique, for providing the fundamental thermodynamic data needed to establish optimum material fabrication parameters, and more importantly understand and predict the behavior of the mineral materials in the environment. The purpose of this project is to experimentally determine the enthalpy of formation of actinide orthosilicates, the enthalpies of formation of actinide substituted zirconolite and pyrochlore, and develop an understanding of the bonding characteristics and stabilities of these materials.

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INIS; OSTI as DE00781717

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  • Other Information: PBD: 1 Mar 2001

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  • Report No.: DOE/ER/45673
  • Report No.: Project Number: 60118
  • Grant Number: FG07-97ER45673
  • DOI: 10.2172/781717 | External Link
  • Office of Scientific & Technical Information Report Number: 781717
  • Archival Resource Key: ark:/67531/metadc724998

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  • March 1, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • Jan. 3, 2017, 12:33 p.m.

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Williamson, Mark A.; Ebbinghaus, Bartley B. & Navrotsky, Alexandra. Fundamental Thermodynamics of Actinide-Bearing Mineral Waste Forms - Final Report, report, March 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc724998/: accessed June 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.