Journal of Radioanalytical and Nuclear Chemistry

, Volume 309, Issue 2, pp 563–573 | Cite as

Preferential removal of Sm by evaporation from Nd–Sm mixture and its application in direct burn-up determination of spent nuclear fuel

  • R. Sajimol
  • S. Bera
  • S. Nalini
  • N. Sivaraman
  • M. Joseph
  • T. Kumar


Rate of evaporation of Sm and Nd from their mixture was studied based on their ion intensities using thermal ionization mass spectrometry. Because of the comparatively larger evaporation rate of Sm, it was found possible to get the isotopic composition of Nd (fission product monitor) free from isobaric interference of Sm isotopes. The decrease in ion intensity of Sm was studied as a function of time and filament temperature. Based on this study, an easy and time effective method for the determination of burn-up of spent nuclear fuel was examined and the results are compared with that obtained by the conventional method. Typical burn-up value obtained for a pressurized heavy water reactor fuel dissolver solution using the direct method by preferential evaporation of Sm is: 0.84 at.%, whereas the one obtained by the use of conventional method is 0.82 at.%. In both the cases, Nd was employed as the fission product monitor.


Burn-up of spent nuclear fuel IDMS TIMS HPLC Nd Sm 



The authors are grateful to Dr. P. R. Vasudeva Rao and Dr. S. A. V. Sathyamurthy, former and present Directors of Chemistry Group, respectively of Indira Gandhi Centre for Atomic Research for their interest and encouragement in this work.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2015

Authors and Affiliations

  1. 1.Chemistry GroupIndira Gandhi Centre for Atomic ResearchKalpakkamIndia
  2. 2.Kalpakkam Reprocessing PlantBARC FacilitiesKalpakkamIndia

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