In addition, a theoretical study was conducted to aid in analyzing data and to provide scaling laws. Program supporting experiments were conducted in these laboratories, using a variety of gas combinations, to investigate those system parameters that were identified in our economics analysis as major capital and energy cost drivers. To aid in addressing the second objective two separate laboratory facilities were constructed. Isotopic enrichment of both more » SF/sub 6/ and UF/sub 6/ was successfully demonstrated in our laboratory using the jet membrane apparatus. To address the first objective a laboratory suitable for handling UF/sub 6/ was outfitted, a jet membrane apparatus compatible with UF/sub 6/ was constructed, and a mass spectrometer capable of providing the necessary precision for UF/sub 6/ isotope measurements was purchased. The project described in this report had two objectives: (1) to demonstrate experimentally that uranium isotopes can be separated using the jet membrane concept, and (2) to make an assessment of the economic viability of the jet membrane in relation to competing processes. The jet membrane is a new aerodynamic setaration concept for enriching uranium. The conduct of new studies was not considered to be appropriate for EPRI because of the changes in enrichment program management and security philosophy discussed in the text. Further, more detailed cost more » analysis would be required to resolve the uncertainties associated with the initial cost estimates. There are a number of uncertainties associated with these cost estimates, such that, in the extreme, the costs might be the same. The same cost structure indicated that the cost per separative work unit for the Jet Membrane process would be two to three times that for the Gas Centrifuge process. The independent results indicated that, based on the same costing ground rules, the Velocity Slip process would require 16 times the fixed capital costs and 12 times the cost per separative work unit as compared to the Jet Membrane Process. An independent contractor prepared detailed cost estimates of the process. Hence the Velocity Slip Process exhibited a larger power consumption than did the Jet Membrane Process. The Velocity Slip Studies demonstrated the predicted effects and did not identify a suitable condensable gas carrier. The Jet Membrane Process Studies demonstrated that the process was feasible and that a condensable gas carrier is available. Both analytical and laboratory studies were conducted to explore the technical feasibility of the subject processes. These techniques are known as the Jet Membrane and Velocity Slip Processes. Two aerodynamic separation techniques for uranium enrichment were investigated for technical feasibility and economic viability.