APPLICATION OF DYNAMIC CROSS-FLOW FILTRATION FOR SOLVING THE TECHNOLOGICAL PROBLEMS OF PROJECT BREAKTHROUGH

摘要

The results of experiments on the clarification of solution simulators obtainable by means of dynamic crossflow filtration during the reprocessing of mixed uranium-plutonium nitride spent fuel are presented. The experiments were performed using full-scale, dynamic, cross-fl ow filtration stands at the RT-1 radiochemical plant at the Mayak Production Association. It is shown that this method yields high-quality clarification of solutions without the use of flocculants - the obtained permeates were completely free of the solid phase and silicic acid in the gamma-form. In addition, the concentration of the solid phase can reach 100 g/cm3 without loss-of-clarification. It is shown that the method of dynamic cross-fl ow fi ltration is effective for clearing transuranium elements from liquid radwaste. After their co-precipitation with the carrier (trivalent iron) and clarification, the obtained permeates are low-level wastes according to the Basic Sanitary Rules for Radiation Safety (OSPORB-99/2010).