Journal of Radioanalytical and Nuclear Chemistry

, Volume 314, Issue 2, pp 803–812 | Cite as

A fast-neutron coincidence collar using liquid scintillators for fresh fuel verification

  • Jonathan S. Beaumont
  • Tae Hoon Lee
  • Mikhail Mayorov
  • Carlo Tintori
  • Francesco Rogo
  • Bruno Angelucci
  • Matteo Corbo


The IAEA has developed a liquid scintillator-based system for the non-destructive assay of 235U in fresh fuel assemblies. The fast neutron coincidence collar (FNCL) addresses current limitations in existing neutron coincidence counting techniques when measuring fuel containing burnable neutron poisons. Detection of fast neutrons rather than thermal neutrons allows the minimisation of measurement time and biases (due to effects of burnable poisons). The FNCL hardware, software and instrument optimisation are discussed. Experimental results from measurements of mock-up uranium fuel assemblies at the institute for transuranium elements, Karlsruhe, Germany with varying 235U enrichment and burnable neutron poison content are presented.


Safeguards Non-destructive assay Uranium assay Neutron coincidence counting Fast-neutron detection Burnable neutron poisons 



This work could not be accomplished without the following support: The Netherlands Support Programme for contributing neutron detectors. The German Support Programme for provision of the mock-up fuel assembly for measurement at the Institute for Transuranium Elements, Germany. Dr. Ludwig Holzleitner (Institute for Transuranium Elements, Germany) for expertise in handling and configuration of the fuel assembly.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2017

Authors and Affiliations

  • Jonathan S. Beaumont
    • 1
  • Tae Hoon Lee
    • 1
  • Mikhail Mayorov
    • 1
  • Carlo Tintori
    • 2
  • Francesco Rogo
    • 2
  • Bruno Angelucci
    • 2
  • Matteo Corbo
    • 2
  1. 1.International Atomic Energy AgencyViennaAustria
  2. 2.CAEN S.p.AViareggioItaly

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