Determination of 135Cs in nuclear power plant wastes by ICP-MS and k0-NAA

P. Nagy, N. Vajda, I. Sziklai-László, É Kovács-Széles, A. Simonits

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Abstract

A radiochemical method for the determination of 135Cs in radioactive wastes has been adopted/developed. For the separation of cesium from other elements ammonium-molybdophosphate precipitation and cation exchange chromatography were used. The chemical yield of the method was about 60-100 %. 135Cs was measured by two methods. In neutron activation analysis (NAA), Cs was irradiated with reactor neutrons. 136Cs was detected by gamma spectrometry, wherefrom the activity/mass of 135Cs was calculated according to the k0-standardization technique. The Cs containing fractions were measured by inductive coupled plasma mass spectrometry, as well. NAA and ICP-MS techniques were comparatively evaluated and a good agreement between the results was found. The activity concentration of 135Cs in a couple of waste samples originating from VVER-440 type nuclear reactors was in the range of 1-5 Bq L-1 (20-120 ng L -1) while 137Cs activity concentrations varied between 0.1 and 1 MBq L-1.

Original languageEnglish
Pages (from-to)615-627
Number of pages13
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume300
Issue number2
DOIs
Publication statusPublished - May 2014

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Keywords

  • Ammonium molybdophosphate
  • Cation exchange
  • Cesium adsorption
  • Cs-135
  • Inductive coupled plasma mass spectrometry
  • Neutron activation analysis

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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