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Czechoslovak Journal of Physics

, Volume 53, Supplement 1, pp A639–A648 | Cite as

Immobilisation of nuclear waste materials containing different alkali elements into single-phase NZP-based ceramics

  • V. I. Pet'kovEmail author
  • A. I. Orlova
  • I. G. Trubach
  • Y. A. Asabina
  • V. T. Demarin
  • V. S. Kurazhkovskaya
Part II Session 7: Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management

Abstract

A single-phase host matrix based upon the sodium zirconium phosphate (NZP) structure and designed to immobilise commercial nuclear waste was investigated. In comparison with other waste forms the important advantage of the NZP ceramics is its ability to incorporate, at crystallographic levels, alkali elements without significant deterioration of the physical and chemical matrix stability. Studies on the incorporation of different alkali elements into the NZP host structure were performed. Single-phase phosphates corresponding to crystalline solutions (continuous and limited) with a structure similar to NZP were found in the series of compounds with the general formula A1−x+4yA′xE2−y(PO4)3 (y=0, 0.5 and 1, and 0≤x≤1+4y), where A-A′ are different alkali elements (Li, Na, K, Rb, and Cs) and E are Ti or Zr. Leaching studies with alkali containing samples revealed reasonable resistance towards the release of the constituents.

Keywords

Alkali Cation Zirconium Phosphate Alkali Metal Salt Alkali Element Zirconium Oxychloride 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Institute of Physics, Acad. Sci. CR 2003

Authors and Affiliations

  • V. I. Pet'kov
    • 1
    Email author
  • A. I. Orlova
    • 1
  • I. G. Trubach
    • 1
  • Y. A. Asabina
    • 1
  • V. T. Demarin
    • 1
  • V. S. Kurazhkovskaya
    • 2
  1. 1.Department of ChemistryNizhni Novgorod State UniversityNizhni NovgorodRussia
  2. 2.Department of GeologyMoscow State UniversityMoscowRussia

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