Rapid measurements of 235U fission product isotope ratios using an online, high-pressure ion chromatography inductively coupled plasma mass spectrometry protocol with comparison to isotopic depletion models

  • Emilie K. Fenske
  • Benjamin D. RoachEmail author
  • David C. Glasgow
  • Ralph H. Ilgner
  • Joseph M. Giaquinto


An automated online separation–direct analysis method, RAPID (rapid analysis of post-irradiation debris), has been developed for the measurement of the concentration and isotopic composition of over 40 elements down to the low-picogram level. Here we discuss the application of RAPID to irradiated highly-enriched uranium, demonstrating that it has the sensitivity required to achieve precise, low-level analyses of non-natural isotopes, even in the presence of a bulk uranium matrix. Isotopic ratios have been successfully measured at the low-picogram level, and the accuracy of these ratios was confirmed using an isotopic depletion and decay modeling software to within 1–2%.


Ion chromatography Inductively coupled plasma mass spectrometry Irradiation Rapid isotope analysis Nuclear material 



This submission has been authored by a contractor of the U.S. Government under contract No. DE AC05-00OR22725. Accordingly, the U.S. Government retains a non-exclusive, royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for the U.S. Government purposes. This work was sponsored by the Defense Threat Reduction Agency (DTRA). This manuscript has been authored in part by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (


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© This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2019

Authors and Affiliations

  1. 1.Oak Ridge National LaboratoryOak RidgeUSA
  2. 2.Institute for Nuclear SecurityUniversity of TennesseeKnoxvilleUSA

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