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Study on the Mass Transfer and Isotope Separation Phenomena in a Gas Centrifuge by Using FEREON Mixtures as Model Compounds

Fard Kashani, Mohammad Reza | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46251 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Outokesh, Mohammad; Karimi-Sabet, Javad; Norouzi, Ali
  7. Abstract:
  8. In the nuclear industry, gas centrifuges are considered of high importance for the purpose of uranium enrichment. Today, with advances in science and technology, the use of gas centrifuges for separating isotopes other than uranium, is so common. With respect to the use of conventional methods such as Pancake equation in calculating the velocity profile in centrifuges, it is needed that A^2=(MV^2)/2RT≫1 (M: Feed molecular weight; V: Peripheral speed of centrifuge; T: Mean temperature of feed; R: The universal constant of gases). While the molecular weight of the feed mixture gets lower, the A2 parameter gets closer to one. So, other methods for modeling the behavior of the gas in the centrifuge are to be used. This research aims at developing a model which is not limited by A2 >> 1. Therefore, it is required to perform the preliminary tests to obtain the intended model parameters and then to predict other experimental results by the model. For this purpose, the experimental results obtained from the injection of the mixture of two gases, namely Freon-12 and Freon-22, as feed to centrifuge were used. To develop the model, using the long bowl model, the velocity profile in a centrifuge machine is computed. Then, in order to overcome the shortcomings of the long bowl model, the appropriate efficiency coefficients, particularly the experimental efficiency factor are used and a suitable model is achieved
  9. Keywords:
  10. Isotope Separation ; Mass Transfer ; Gas Centrifuge ; Long Bowl Model ; Efficiency Coefficients ; Freon Compounds

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