DECONTAMINATION BY ULTRAFILTRATION OF LOW ACTIVITY URANIUM CONTAMINATED WASTE WATERS FROM FUEL ELEMENT PRODUCTION
It could be demonstrated that waste waters which contain uranium in a filterable form, such as laundry and floor cleaning waste, can be sufficiently decontaminated by means of ultrafiltration. In the case of process waste solutions, which contain uranium in a dissolved form, high decontamination factors could be achieved by means of flocculation or coprecipitation. The following methods were tested: + coprecipitation with CaHPO-4 + precipitation with K-4(Fe(CN)-6. The phosphate precipitation, whereby the uranium is probably coprecipitated as Ca(UO-2)-2(PO-4)-2, was found to be the most reliable method. Difficulties were encountered when complex forming anions, notably carbonate, oxalate and fluoride were present. These necessitate specific pretreatment steps. Whether ultrafiltration still remains an economical option must be judged in each individual case. The application of the methods so far developed on combined waste streams remains an object for further research. In combination with a phosphate precipitation, ultrafiltration is a suitable method for the decontamination of low activity, uranium contaminated waste waters.
Bibliographic Reference: EUR 9281 DE (1984) MF, 78 P., BFR 120, BLOW-UP COPY BFR 390, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989123043900 / Last updated on: 1987-01-01
Available languages: de