Unit 1 of the Dresden nuclear power plant (PWR) installed a system utilizing a combination of ultrafiltration and reverse osmosis, followed by a deep bed demineralizer [97]. The plant needed to process two tanks containing a total of 1440 m3 (380 000 Gal (US)) of LRW that was also contaminated by TRU elements. The objective was to reduce the waste volume to a level that would be practical for further processing and conversion to a final waste form. The waste feed was directed to the ultrafiltration unit and the ultrafiltration permeate was fed to the reverse osmosis unit. Both the ultrafiltration and the reverse osmosis concentrate streams were returned to the feed tanks. The reverse osmosis permeate, after passing through deep bed demineralizing units, was collected in product water tanks and then, after confirmation that release criteria were met, discharged from the plant. By using an ultrafiltration/reverse osmosis system, the feed tank contents were reduced by a factor of 10, minimizing the residual volume requiring treatment for final disposal. The
đang được dịch, vui lòng đợi..
