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A method for in-situ quantification of oxygen in oil using fast neutron activation analysis

  • F. Owrang , H. Mattsson and A. Nordlund
Published/Copyright: May 2, 2013
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Kerntechnik
From the journal Kerntechnik Volume 69 Issue 1-2

Abstract

The feasibility of an experimental methodology for in-situ quantification of oxygen in bulk oil using fast neutron activation analysis (FNAA) has been studied. The method was applied for determination of oxygen in 100 ml (∼ 90 g) rapeseed oil. The amount of oxygen in the rapeseed oil using the in-situ FNAA was estimated to 10.6 ± 2.6 weight %. Using cyclic fast neutron activation analysis (cFNAA), the amount of oxygen in the oil was determined in average 9.9 ± 0.4 weight %. Based on Monte Carlo calculations on water, the optimal radius and height of a cylindrical container where the activity is distributed through stirring of the water would be about 10 cm and 44 cm, respectively. These dimensions give a volume of about 14 liters, which is suitable for any type of oil. The accuracy in the in-situ FNAA can be increased by a more precise determination of oxygen in rapeseed oil in the beginning of a dynamic process using cFNAA or alternatively by a better background subtraction.

Kurzfassung

Die Machbarkeit einer experimentellen Methodik zur in-situ Quantifizierung des Sauerstoffgehalts in Öl mit Hilfe der schnellen Neutronenaktivierungsanalyse (FNAA) wurde untersucht. Die Methode wurde angewendet zur Bestimmung von Sauerstoff in 100 ml (∼ 90 g) Rapsöl. Der Sauerstoffanteil in Rapsöl wurde mit Hilfe der in-situ FNAA Methode zu 10.6 ± 2.6 Gewichtsprozente bestimmt. Verwendet man die zyklische schnelle Neutronenaktivierungsanalyse (cFNAA), so ergeben sich für den Sauerstoffanteil in Öl durchschnittlich 9.9 ± 0.4 Gewichtsprozente. Auf der Grundlage von Monte Carlo Berechnungen in Wasser liegt der optimale Radius bzw. die Höhe eines Zylinders, in dem die Aktivität durch Rühren des Wassers verteilt ist, bei 10 cm bzw. 44 cm. Diese Dimensionen ergeben ein Volumen von etwa 14 Litern, das für jede Ölart geeignet ist. Die Genauigkeit der in-situ FNAA Methode kann durch eine genauere Bestimmung des Sauerstoffanteils in Rapsöl zu Beginn eines dynamischen Prozesses mit Hilfe der cFNAA oder alternativ durch eine bessere Untergrundsubtraktion erhöht werden.

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Received: 2003-9-9
Published Online: 2013-05-02
Published in Print: 2004-02-01

© 2004, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Summaries/Kurzfassungen
  4. Summaries
  5. Technical Contributions/Fachbeiträge
  6. Sensitivity analysis of the Peach Bottom Turbine Trip 2 experiment
  7. Theoretical and experimental investigations into natural circulation behaviour in a simulated facility of the Indian PHWR under reduced inventory conditions
  8. A new data-condensation method based on multidimensional minimisation
  9. Current international activities to increase fire protection knowledge for nuclear power plants
  10. Simple formulas for conservatively calculating the fuel rod cladding strains due to RIA
  11. Accelerator driven systems for transmutation and energy production: challenges and dangers
  12. A method for in-situ quantification of oxygen in oil using fast neutron activation analysis
  13. The time-dependent effect of the biological component of 137Cs soil contamination
  14. Letter to the Editor
  15. Remarks on pulsed neutron activation
  16. On the critical radius of reflected spheres
https://doi.org/10.3139/124.100188

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Summaries/Kurzfassungen
  4. Summaries
  5. Technical Contributions/Fachbeiträge
  6. Sensitivity analysis of the Peach Bottom Turbine Trip 2 experiment
  7. Theoretical and experimental investigations into natural circulation behaviour in a simulated facility of the Indian PHWR under reduced inventory conditions
  8. A new data-condensation method based on multidimensional minimisation
  9. Current international activities to increase fire protection knowledge for nuclear power plants
  10. Simple formulas for conservatively calculating the fuel rod cladding strains due to RIA
  11. Accelerator driven systems for transmutation and energy production: challenges and dangers
  12. A method for in-situ quantification of oxygen in oil using fast neutron activation analysis
  13. The time-dependent effect of the biological component of 137Cs soil contamination
  14. Letter to the Editor
  15. Remarks on pulsed neutron activation
  16. On the critical radius of reflected spheres
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