Development and progress of the South African enrichment project

The earlier development of the project is briefly reviewed, and some of the salient features of the South African process are touched upon. Development of the separation element since April 1975 is discussed, as well as further work on the helikon cascade process. A brief description of the helikon cascade operation is given by means of diagrams. Some examples of helikon theory are shown. Experimental work done to verify the helikon concept, as well as theoretical treatment, is presented. A brief report of the progress made on the experimental module of 6t/a separative work capacity is given. This module, known as Mini-Z, is well advanced and details of its features and construction are shown. A short discussion of progress on the full-scale prototype module, known as Proto-Z, is next presented. The flexibility of such a design to fit a wide range of cascade sizes is considered, as well as cost implications of various approaches to design. Apart from progress on the development of the commercial plant, a brief review is given of the present state of the pilot plant at Valindaba. Some of the information obtained is mentioned. In conclusion, some information is given on further planning and other work on the commercial plant at present being undertaken. Projected operation of the plant and some nuclear fuel service aspects are touched on. (author)