Fuel Cycle Programs, Quarterly Progress Report: July-September 1981 Page: 15
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CEN Fused salt supernate alone
CEN Fused salt supernate +
~ 5% sludge
MSD Fused salt supernate +
10% sludge
MSD Fused salt supernate +
20 % sludge
I0 10 20 30 40
SURFACE AREA, cm250 60
Fig. 2. Dissolution/Disintegration Rates
vs. Surface Area for NFS Simu-
lated Waste Fused Salt
For the MSD results, this correlation is far from convincing. Exam-
ination of the data in Table 4 shows a large scatter for the measured density
(a reflection of the lack of homogeneity of the MSD-prepared material). For
CEN samples of similar material, the measured densities of the various samples
agreed within 2% in all cases. The MSD samples obviously dissolve more slowly
than the CEN samples do (Fig. 2). This difference may be due to the long
standing times of the MSD samples in ambient conditions and/or to a difference
in composition of the CEN and MSD fused salts. Although these differences
are real, insufficient time remains to resolve the issue.
The dissolution/disintegration rates in quiescent water of two other
silicate-agglomerated Fe203 pellets prepared by MSD were measured. These two
pellets, prepared as described previously [STEINDLER-1980], were composed of
2/1 and 6/1 weight ratios of SS-65 to Fe203. (SS-65 is a silicat powder
with a 3.22 weight ratio of Si02/Na20.) The SS-65 agglomerated pellets were
even more resistant to water attack than the SS--C pellets studied earlier.
(SS-C is a 2/1 weight ratio of S102/Na20 silicate powder.) The induction
period of ind al weight gain was two hours for these materials, compared with
20 min for the SS-C pellets. The results of these experiments and, for com-
parison, those reported previously on SS-C samples are presented in Table 5.
The SS-65 pellets were more resistant to attack by water, as might be expected
because of their higher silicon content./
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Steindler, M. J.; Bates, J. K.; Bowers, D. L.; Brock, R. E.; Cannon, T. F.; Castelli, D. L. et al. Fuel Cycle Programs, Quarterly Progress Report: July-September 1981, report, May 1982; Argonne, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc283345/m1/25/?q=technical+manual: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.