Salzbure,-19??, reprintecl in IAEA, Nuclear Poner and its IueI CycLe, IAXA-CN-36/ 3C0,pp, Ut-182; w. L. crant, .r. .r. wanffi casead.e Technique for the South Africar Enrichment Process", Presentation to Meeting of the American Institute of Chernical- Engineers, Chicago, 1 Decernber .1976, reprinted in IAChE, Synpos ir:m Series, vo1. 73, no. 169, pp. 20-21+. ?9/ Ilanson Benedict, "Aerodynamic Processes , nineo; fNFCE, EnrichnentAvail ility, Report of Working Group 2, TNF1E/PC|2/2, p. 72. 'tyl lj.Orx ancl LiIanI, Ine Uouln Alrlcan Uranlum .tjnrlenment HrOJec! r pp, 4->. 30/ Newby-F"aser, ghain Reaction pp. y)-vo. f!/ Roux et al-., I'Developrnent and Progress of the South African En"ichment ProJ ect rr , p. 1?3. ?/ Araong the sal-ient operating characteristics of the UCOB-process are saidto be a separation fs.ctor of 1.025-1.03 ( cornpared to 1.00).r fo" gaseous diffusion, 1.2-1.5 for centrifuge, and 1.015 for nozz3-e), 1ow material i.nventory and consequently short equilibrium time, high energy consurnption (3,300 t*fr7St'tU/year ) and cperation at a very lolr cut, 0.05 (i.e,, the product stream of sJ-ightly nore enriched uranium consists of a very snall portion - I/?]th - of the feed stream Boux and Grant, rtThe Sorth African Uraniun Enriclment ProJect", pp, I'-?; Roux et al.,trDevelopment and Progress of the South African Enrichment ProJect'r, pp. 20-21,.t\/35/\c2 Eng1i sh .Annex lage 12 development of a new cascade tecbnique to link to€:ether the separatinE! elenents through which the rateriaL fLows in sequence. Called the "helikon" technique,it 3V was not applied, however, to the pilot plant begun in April f975. y 18. Construction of the pilot facility vas corc;rleted by March 197?. Initial estimates at the tine pfaced the capacity of this facility at 5 tons separative waak units (Slru)/year. 35/ Hor.rever, according to the official history ot SouttrAfrica's nuclear procrar.Jnc, f fthe- oeve.o!.ncrL r.orL: ha.r .nahLed l-lc .aoacit) of the
**Analysis**
The text appears to be discussing the South African uranium enrichment process, including its operating characteristics, a new cascade technique called "helikon", and the development of a pilot plant. The focus is on the technical aspects of the process and the progress made in its development. This suggests that the text is related to the field of science and technology.

**Category**
Science and technology