Determination of 237Np, 93Zr and other long-lived radionuclides in medium and low level radioactive waste samples

Sz Osváth, N. Vajda, Zs Molnár, E. Széles, Zs Stefánka

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11 Citations (Scopus)

Abstract

The majority of long-lived radionuclides produced in the nuclear fuel cycle can be regarded as "difficult-to-measure" nuclides, hence chemical separation is needed before the nuclear measurement of them. A combined radiochemical procedure that enables the simultaneous determination of some "difficult-to-measure" nuclides in medium and low level radioactive wastes has been developed in our laboratory. Recently, this method has been extended for determination of 237Np and 93Zr. 237Np and 93Zr are pre-concentrated by co-precipitation on iron(II) hydroxide and zirconium oxide, separated by extraction chromatography using UTEVA, and measured by inductively coupled plasma mass spectrometry (ICP-MS). As even traces of polyatomic ions and isotopes at m/z 237 or 93 cause considerable interferences during ICP-MS detection, a purification step by extraction chromatography was needed. Analyzing real samples (evaporation concentrates of a nuclear power plant) 66-99% and 31-99% chemical yields were achieved for Np and Zr, respectively.

Original languageEnglish
Pages (from-to)675-680
Number of pages6
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume286
Issue number3
DOIs
Publication statusPublished - Dec 1 2010

Keywords

  • Extraction chromatography
  • ICP-MS
  • Np
  • UTEVA
  • Zr

ASJC Scopus subject areas

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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