Chemical Processing Department Monthly Report: July 1957 Page: 82 of 107
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Research and Engineering HW-51802
METAL FINISHING OPERATION
Task I and II
Equipment shakedown and acceptance testing of the new continuous processing
facility was completed. Shift coverage for the operation is being provided
during the start-up period.
A total of 39 runs were processed through the Slag and Crucible Hood,
including 14 Task III fragment runs, 4 cleanout runs, 2 Task IV crucible
runs and 19 combination Task ]II fragment and powder runs. Slurry losses
averaged 2.2 percent of the recovered plutonium (1.3 percent cribbed).
Eleven of the Task III fragment and eight of the combination Task III
fragment and powder runs contained ten crucibles per charge. These runs
were the first to test a new dissolver flowsheet using 2.5 mols of aluminum
(vice 3.5 mols) to complex each fluoride ion following dissolution. The
runs were processed without a coagulation period except for the length of
time provided by transfer and hold-up in the filter feed tank. Filter
operation and subsequent solvent extraction processing of this feed appears
to be normal. The test will be continued.
The solvent extraction hood averaged 1410 liters of feed per day to the
columns at an operating efficiency of 80 percent, giving an instantaneous
rate of 1760 liters per day. The waste losses averaged 0.0060 grams per
liter or 0.89 percent of the feed. The high waste losses and low volume
throughput were caused by the presence of large quantities of decomposed
solvent dissolved in the feed. A procedure was issued which provides for
solvent washing of these solutions to remove the decomposition products
MBP and DBP before reprocessing.
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Hanford Atomic Products Operation. Chemical Processing Department. Chemical Processing Department Monthly Report: July 1957, report, August 22, 1957; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1312193/m1/82/: accessed May 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.