Study on a HF Measurement Procedure at Chemical Traps Output of Uranium Enrichment Facilities, under Medium Vacuum

Karimpour, K; Safdari, S.J; Mousavian, M.A

Study on a HF Measurement Procedure at Chemical Traps Output of Uranium Enrichment Facilities, under Medium Vacuum

Document Type : Research Paper

Authors

K Karimpour

S.J Safdari

M.A Mousavian

Abstract

The flow passed chemical traps is a mixture of light gas, hydrogen fluoride and uranium hexafluoride. It is necessary to take samples from the chemical traps output flow, to assure the accurate operation, non-saturation of adsorbent, proper loading and to control the output concentration of hydrogen fluoride and uranium hexafluoride. The routine approach for sampling is impossible because of the process of continuity and vacuum conditions. A procedure for the chemical traps output sampling is introduced in this paper under the assumption of the lack of uranium hexafluoride at the output of the chemical trap, and its effective parameter was optimized. As a result, the sampling time and pressure which are considered as the most important parameter were evaluated and their optimized values were estimated.

Highlights

1. K. Karimpour, M.A. Mousavian, S.J. Safdari, O. Zadakbar, “Study on sodium fluoride dimensions in UF₆ & HF chemical traps,” The 5^th International Chemical Engineering Congress, Kish, I.R. Iran (ICHEC 2008).

2. R.M. Schultz, W.E. Hobbs, J.L. Norton, M.J. Stephenson, “Sorbent selection and design consideration for uranium trapping,” K/ET-5025 (1981).

3. M.J. Stephenson, “A design model for dynamic adsorption of uranium hexafluoride on fixed beds of sodium fluoride,” K-L-6195 (1968).

4. L.E. McNeese, “An experimental study of sorption of uranium hexafluoride by sodium fluoride pellets and mathematical analysis of diffusion with simultaneous reaction,” ORNL-3494 (1983).

5. L.E. Mc Neese and S.H. Jury, “Removal of uranium hexafluoride from gas streams by sodium fluoride pellets,” ORNL-1-281 (1964).

6. W.A. Johnston, “Designing fixed-bed adsorption columns,” Chemical Eng. Nov. 27 (1972).

7. E.B. Munday, “Preconceptual design of the gas-phase decontamination demonstration cart,” K/TCD-1076 (1993).

8. W. Umrath, “Fundumental of vacuum technology,” Leybold Vacuum Ind, Cologne, (1998).

9. L.N. Rozanov, “Vacuum technique,” 1st ed, Taylor & Francis, London (2002).

10. Perry’s Chemical Engineers Handbook, 7^th ed. McGraw Hill Co, New york (1999).

Keywords

Chemical Trap

Sampling

Vacuum

Hydrogen Fluoride

1. 1. K. Karimpour, M.A. Mousavian, S.J. Safdari, O. Zadakbar, “Study on sodium fluoride dimensions in UF₆ & HF chemical traps,” The 5^th International Chemical Engineering Congress, Kish, I.R. Iran (ICHEC 2008).
1. 2. R.M. Schultz, W.E. Hobbs, J.L. Norton, M.J. Stephenson, “Sorbent selection and design consideration for uranium trapping,” K/ET-5025 (1981).
1. 3. M.J. Stephenson, “A design model for dynamic adsorption of uranium hexafluoride on fixed beds of sodium fluoride,” K-L-6195 (1968).
1. 4. L.E. McNeese, “An experimental study of sorption of uranium hexafluoride by sodium fluoride pellets and mathematical analysis of diffusion with simultaneous reaction,” ORNL-3494 (1983).
1. 5. L.E. Mc Neese and S.H. Jury, “Removal of uranium hexafluoride from gas streams by sodium fluoride pellets,” ORNL-1-281 (1964).
1. 6. W.A. Johnston, “Designing fixed-bed adsorption columns,” Chemical Eng. Nov. 27 (1972).
1. 7. E.B. Munday, “Preconceptual design of the gas-phase decontamination demonstration cart,” K/TCD-1076 (1993).
1. 8. W. Umrath, “Fundumental of vacuum technology,” Leybold Vacuum Ind, Cologne, (1998).
1. 9. L.N. Rozanov, “Vacuum technique,” 1st ed, Taylor & Francis, London (2002).
10. Perry’s Chemical Engineers Handbook, 7^th ed. McGraw Hill Co, New york (1999).