Journal of Radioanalytical and Nuclear Chemistry

, Volume 295, Issue 2, pp 1553–1560 | Cite as

Fluorescence and absorbance spectroscopy of the uranyl ion in nitric acid for process monitoring applications

  • Nicholas A. SmithEmail author
  • Gary S. Cerefice
  • Kenneth R. Czerwinski


Near real time process monitoring of the uranium content in an aqueous fuel recycling plant is a desired component of an advanced safeguards suite; Ultraviolet–Visible spectroscopy and Time Resolved Laser induced Fluorescence Spectroscopy can contribute to this technology gap. This work presents the observation of the spectroscopic parameters (molar absorptivities, fluorescent response) of the uranyl ion across the range of conditions expected in reprocessing chemistry. From this data, a monitor using the ratio of the absorbance of the uranyl ion at 403 and 426 nm has been developed. This technique can determine the nitrate solution concentration and can be coupled with a condition appropriate molar absorptivity to determine the uranyl concentration. This method provides a reliable technique for online, real time process monitoring of the uranyl and nitrate concentration under a wide range of solution compositions.


Ultraviolet–visible spectroscopy Time resolved laser induced fluorescence spectroscopy Uranyl nitrate Process monitoring 


  1. 1.
    World Nuclear Association (2010) Processing of Used Nuclear Fuel. Accessed May 3, 2010
  2. 2.
    Bostick DT (1978) Simultaneous analysis of uranium and nitrate. Oak Ridge National Laboratory, Oak RidgeCrossRefGoogle Scholar
  3. 3.
    Lascola R, Livingston RR, Sanders MA, McCarty JE, Dunning JL (2002) J Proc Anal Chem 7(1):14–20Google Scholar
  4. 4.
    Deniau H, Decambox P, Mauchien P, Moulin C (1993) Radiochim Acta 61(1):23–28Google Scholar
  5. 5.
    Klygin AE, Kolyada NS, Smirnova AE (1970) Russ J Inorg Chem 15:1719–1721Google Scholar
  6. 6.
    Nash K, Madic C, Mathur JN, Lacquement J (2006) In: Morss LR, Edelstein NM, Fuger J (eds) The chemistry of the actinide and transactinide elements. Springer Link, The NetherlandsGoogle Scholar
  7. 7.
    Vandegrift GF, Regalbuto MC, Aase S, Bakel A, Battisti TJ, Bowers D, Byrnes JP, Clark MA, Emery JW, Falkenberg JR, Guelis AV, Pereira C, Hafenrichter L, Tsai Y, Quigley KJ, Vader Pol MH (2004) Designing and demonstration of the UREX + process using spent nuclear fuel. Paper presented at the ATATLANTE 2004—Advances for future nuclear fuel cycles. Nimes, France, June 21–24Google Scholar
  8. 8.
    Bell JT, Biggers RE (1965) J Mol Spectrosc 18(3):247–275CrossRefGoogle Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2012

Authors and Affiliations

  • Nicholas A. Smith
    • 1
    Email author
  • Gary S. Cerefice
    • 1
  • Kenneth R. Czerwinski
    • 1
  1. 1.University of NevadaLas VegasUSA

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