Year
1989
Abstract
A model to calculate the extracting behavior of a sieve-plate column has been evaluated. It contains the chemical distribution of nitric acid and uranium in aqueous and organic phase as well as hydrodynamical effects. The model was used to approximate results of experimental measurements. These measurements have been performed in a test facility (TEKO/WAK) of the Nuclear Research Center Karlsruhe. Results of the calculation show that it is possible to point out some of the main observations of extraction. The stationary conditions are described satisfactorily. The time range necessary to reach stationary conditions again after an incident agrees well with experimental facts.