Corrosion of a Pu-doped zirconolite-rich ceramic

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As part of a large Pu disposition program, a zirconolite-rich titanate ceramic is being developed at Lawrence Livermore National Laboratory (LLNL) as a possible immobilization material. This same material is being tested at Argonne National Laboratory (ANL). The goal of this study is to describe the corrosion behavior of this ceramic, particularly the release of Pu and Gd, using results from several static corrosion tests (MCC-1, PCT-A, and PCT-B). The release of relatively large amounts of Al, Ba, and Ca in short-term tests (3 day MCC-1 and 7 day PCT-A) indicates that these elements are released from grain boundaries or ... continued below

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10 p.

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Bakel, A.J.; Buck, E.C.; Wolf, S.F.; Chamberlain, D.B.; Bates, J.K. & Ebbinghaus, B.B. June 1, 1997.

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Description

As part of a large Pu disposition program, a zirconolite-rich titanate ceramic is being developed at Lawrence Livermore National Laboratory (LLNL) as a possible immobilization material. This same material is being tested at Argonne National Laboratory (ANL). The goal of this study is to describe the corrosion behavior of this ceramic, particularly the release of Pu and Gd, using results from several static corrosion tests (MCC-1, PCT-A, and PCT-B). The release of relatively large amounts of Al, Ba, and Ca in short-term tests (3 day MCC-1 and 7 day PCT-A) indicates that these elements are released from grain boundaries or from highly soluble phases. Results from long-term (28, 98, and 182 day) PCT-B show that the releases of Al, Ba, and Ca decrease with time, the releases of U and Zr increase with time, and that the releases of Cs, Gd, Mo, and Pu remain fairly constant. Formation of alteration phases may lead to the decrease of Ba and Ca in leachate solutions. Due to the heterogeneous nature of the material, the formation of alteration phases, and the inherently low solubility of several elements, no element(s) could be recommended as good markers for the overall corrosion of this ceramic. Data show that, due to the complex nature of this material, the release of each element should be considered separately.

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10 p.

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INIS; OSTI as DE97053065

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  • 99. annual meeting of the American Ceramic Society, Cincinnati, OH (United States), 4-7 May 1997

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  • Other: DE97053065
  • Report No.: ANL/CMT/CP--92098
  • Report No.: CONF-970568--4
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 495704
  • Archival Resource Key: ark:/67531/metadc687073

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  • June 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • Dec. 14, 2015, 6:49 p.m.

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Bakel, A.J.; Buck, E.C.; Wolf, S.F.; Chamberlain, D.B.; Bates, J.K. & Ebbinghaus, B.B. Corrosion of a Pu-doped zirconolite-rich ceramic, article, June 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc687073/: accessed August 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.