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Title: Comparing results of X-ray diffraction, µ-Raman spectroscopy and neutron diffraction when identifying chemical phases in seized nuclear material, during a comparative nuclear forensics exercise

This work presents the results for identification of chemical phases obtained by several laboratories as a part of an international nuclear forensic round-robin exercise. In this work powder X-ray diffraction (p-XRD) is regarded as the reference technique. Neutron diffraction produced a superior high-angle diffraction pattern relative to p-XRD. Requiring only small amounts of sample, µ-Raman spectroscopy was used for the first time in this context as a potentially complementary technique to p-XRD. The chemical phases were identified as pure UO 2 in two materials, and as a mixture of UO 2, U 3O 8 and an intermediate species U 3O 7 in the third material.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [2] ;  [4] ;  [4] ;  [5] ;  [5] ;  [5] ;  [5] ;  [6] ;  [6] ;  [7] ;  [7]
  1. Swedish Defence Research Agency (FOI), Umea (Sweden). CBRN Defence and Security
  2. DAM, DIF, French Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France)
  3. Swedish Defence Research Agency (FOI), Umea (Sweden). CBRN Defence and Security ; Chalmers University of Technology, Goteborg (Sweden). Department of Chemistry and Chemical Engineering, Nuclear Chemistr
  4. French Alternative Energies and Atomic Energy Commission (CEA), CEA-Centre de Valduc, Is-Sur-Tille (France)
  5. Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights (Australia)
  6. South Africa Nuclear Energy Corporation (NECSA) Pelindaba, Pretoria (South Africa)
  7. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-679185
Journal ID: ISSN 0236-5731
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Journal of Radioanalytical and Nuclear Chemistry
Additional Journal Information:
Journal Volume: 315; Journal Issue: 2; Journal ID: ISSN 0236-5731
Publisher:
Springer
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; 36 MATERIALS SCIENCE; XRD; µ-Raman Spectroscopy; Neutron diffraction; Phase identification; Nuclear forensics; Uranium oxide
OSTI Identifier:
1424108