Uncertainty of determination of 158Tb in the RBMK nuclear reactor waste

Research output: Contribution to journalArticle


The activity of 158Tb was measured in waste samples from the Ignalina NPP Unit I RBMK-1500 reactor using gamma-ray spectrometry. The origin of 158Tb and the other observed gamma-ray emitters has been studied by using SCALE 6.1 modeling and comparing radionuclide ratios in the RBMK-1500 radioactive waste. The results of the calculation of the massic activity of gamma-ray emitters were used for interpretation of the total gamma-ray spectrum and the determination of 158Tb massic activity uncertainty in the waste of RBMK-1500.


  • Artūras Plukis
  • Vytenis Barkauskas
  • Rūta Druteikienė
  • Grigorijus Duškesas
  • Darius Germanas
  • Arūnas Gudelis
  • Laurynas Juodis
  • Elena Lagzdina
  • Rita Plukienė
  • Vidmantas Remeikis
External organisations
  • Center for Physical Sciences and Technology, Lithuania
Research areas and keywords


  • Tb, Gamma-ray spectrometry, Radioactive waste, Radionuclide ratios, Scaling factors
Original languageEnglish
Pages (from-to)190-193
Number of pages4
JournalApplied Radiation and Isotopes
Publication statusPublished - 2018 Apr 1
Publication categoryResearch
Externally publishedYes