Fuel Cycle Programs, Quarterly Progress Report: July-September 1981 Page: 11
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11
Contrary to these results are the results obtained on
a sample of 20 wt % simulated NFS sludge/fused salt prepared by members of
ANL Materials Science Division (MSD); the composition of the simulated sludge
used in this preparation was reported earlier [STEINDLER-1980]. The differ-
ences in this preparation compared to the Chemical Engineering Division pre-
paration were: (1) FeP04*2H20 was used in conjunction with Fe203 to produce
the necessary iron content and (2) Cr203 was used instead of Cr03 to produce
the necessary chromium content.
Figure 1 shows the dramatic effect of cycling the MSD
sample between 150 and 400*C. Although the loss in weight tended to subside
after the eighth cycle, the changes in the freezing curve did not. The fairly
narrow melting range of the first cycle (9*C) had expanded to 72 C by the 15th
cycle. Because this sludge/salt had been stored for six months in the atmo-
sphere, these changes in melting range may be attributable to water loss
during this heat treatment. There is also a possibility that the melt com-
position changed due to the :eaction:0
-J
F-
WI0
10
8
6
4
2v0 2 4 6 8 10
FREEZING CYCLE12 14 16
Fig. 1. Freezing BFhavior of Materials
Science Division Sample during
Fifteen Freezing and Melting
Cycles'nn
270 '
260
250
L2
a 240
0c
W 230220
210- O
O
-Q -
- O Freezing begins
f Major peak(s) in the freezing curve
0 Complete solidification
- Q19
Ar
-kA
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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/m1/21/?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.