Separation nozzle process

Enrichment of the Sy-isotope from the 0.711% in natural uranium to ca. 4% can proceed by gas diffusion, with a gas centrifuge and with separation nozzles. The separation nozzle process is no longer important. Pure uranium(VI) fluoride is utilized. 

Separation nozzle process Process demonstrated on large pilot-plant scale at Karlsruhe, Germany semiconunerdal plant being built in Brazil... 

Figure 12.5 Cross section of slit used in Becker separation nozzle process.

In some isotope separation processes it is impractical to operate a stage at a cut of for mechanical or hydraulic reasons, and in others the separative capacity of the stage is higher at a cut substantially different from In the Becker separation nozzle process described in Chap. 14, the separative capacity of a stage producing a heads stream at a given rate is substantially hi er at a cut of than at a cut of j. 

In the UCOR process, unlike the separation nozzle process, the depleted stream is recompressed through a smaller pressure ratio (1.12) than the enriched stream (1.5). Hence, to evaluate the energy used in compression it is necessary to know the hydrogen cut 8, the fraction of hydrogen fed that leaves in the enriched stream, and the composition of the enriched stream represented by the mole fraction /i of UF in it. A development analogous to the one that led to Eq. (14.271) for the Up6 cut results in Eq. (14.296) for the hydrogen cut ... 

Becker, E. W., et al. Physics and Technology of Separation Nozzle Process, in Nuclear Energy Maturity, Proceedings of the European Nuclear Conference, Paris, 21-25 April, 1975, Invited Sessions, Pergamon, New York, 1975, p. 172. 

Gl. Geppert, H., et al. The Industrial Implementation of the Separation Nozzle Process, Proceedings of the International Conference on Uranium Isotope Separation, British Nuclear Energy Society, London, Mar. 5-7, 1975. 

Figure 7.3.17. Cross section of the slit and curved nozzle in the separation nozzle process. (After Benedict et at (1981).)...

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