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