Processing NPP Bottoms by Ferrocyanide Precipitation Page: 3 of 9
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WM'02 Conference, February 24-28, 2002, Tucson, AZ
Filtrate after ozonization and ferrocyanide precipitation was subjected to additional cleaning on
ferrocyanide sorbent Termoxid T-35. Filtrate was passed through two consequently connected
columns the volume of 20 ml and height of 22 cm each. The flow rate of filtration through
columns was 200 ml/hour.
Results and their discussion
The results of the analysis of chemical and radionuclide composition of the samples are presented
in Table I.
Table I. Chemical and radionuclide composition of bottoms.
Parameter Units of measurements Size
Density Kg/m3 1,34
Na+ g/l 116
K+ g/l 60
NO3 g/l 408
H3B03 g/l 9,9
Oxidability g 02/1 6
137Cs Bq/1 (Ci/1) 7,4.107 (2,0.10-3)
134Cs Bq/1 (Ci/1) 1,8.107 (4,8.10~4)
60Co Bq/1 (Ci/l) 1,1*106 (3,0.10~5)
54Mn Bq/1 (Ci/1) 5,64104 (1,5.10-6)
Three sets of ozonization (15 1) of the bottoms under following conditions were carried out:
1 and 2 - without the additives;
3 - with the additive Co(NO3) 2 0,5 g/1.
Ozonization was finished when optical density of sampling filtrate constant in time was achieved.
For definition of cleaning from Co60 the bottoms after ozonization and filtration were passed
through a column with ferrocianide sorbent and spectrometer analysis was carried out. Filtering of
samples from first two sets was carried out on the double paper filter blue tape , and samples
from the third set were filtered on the Millipore filter with the pore size 0,45 microns. The data on
the bottoms cleaning from Co60 are given in table II.
Table II. Results of the bottoms cleaning from radionuclides by using ozonization, filtration and
N set Df Specific activity, Bq/1 (Ci/l)
1 1100 1,0*103 (2,7.10-8)
2 750 1,54103 (4,0.10-8)
3 1800 6,3.102 (1,7.10-8)
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Savkin, A. E.; T., Slastennikov Y. & G., Sinyakin O. Processing NPP Bottoms by Ferrocyanide Precipitation, article, February 25, 2002; Tucson, Arizona. (digital.library.unt.edu/ark:/67531/metadc785551/m1/3/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.