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Czechoslovak Journal of Physics

, Volume 56, Issue 1, pp D659–D664 | Cite as

Determination of plutonium isotopes in low activity waste of NPP origin

  • A. Nikiforova
  • I. Taskaeva
  • B. Veleva
  • Tz. Valova
  • B. Slavchev
  • D. Dimitrova
Chemistry Of Nuclear Fuel Cycle, Radiochemical Problems In Nuclear Waste Management

Abstract

The inventory analysis of the alkaline low level liquid radioactive waste collected during more than 30 years of NPP “Kozloduy” operation requires determination of eighteen radioactive isotopes with different decay properties. Plutonium isotopes of interest are Pu-238, Pu-239/Pu-240, and Pu-242. The preliminary investigations of the supernatant phase of model and authentic waste samples showed essential challenges for determination of plutonium due to its various oxidation states and low concentration in the complex matrix. Plutonium concentration was determined in precipitate and supernatant after the calcium phosphate precipitation and in the different fractions of the anion exchange steps. The separation by anion exchange and final purification of plutonium fraction by extraction chromatography on TEVA resin (EiChroM Industries) was studied by variation of plutonium oxidation states. The sources were prepared by micro precipitation with NdF3 and counted by alpha spectrometry. As a result from the performed experiments, plutonium determination procedure was optimized and applied to real waste samples.

Keywords

Plutonium Alpha Spectrometry Waste Sample Chemical Recovery Plutonium Isotope 
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, Academy of Sciences of the Czech Republic 2006

Authors and Affiliations

  • A. Nikiforova
    • 1
  • I. Taskaeva
    • 1
  • B. Veleva
    • 2
  • Tz. Valova
    • 2
  • B. Slavchev
    • 1
  • D. Dimitrova
    • 1
  1. 1.Institute for Nuclear Research and Nuclear Energy - BASSofiaBulgaria
  2. 2.National Institute of Meteorology and Hydrology - BASSofiaBulgaria

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