Chemical Processing Department Monthly Report: July 1957 Page: 20 of 107
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HW-5180 2 3
1. Process Tests and Revisions
The following program has been initiated to better define the
parameters of high activity waste self concentration and permit
optimal utilization of available waste tank storage space.
a) Carbonate wastes were routed to tank 241-A-102 on July 5.
b) Corrosion coupons and concrete specimens were placed in tank
241-A-103. (Coupons were removed on 7-26-57 for testing).
c) A temperature profile device was installed in tank 2h1-A-103
on July 26, 1957.
d) Routine waste tank liquid and vapor phase sampling for pH
and oxides of nitrogen was started.
e) The sodium molarity in tank 2h1-A-103 is being increased
incremently to determine its effect on sludge formation and
nitrogen oxide evolution.
f) Laboratory studies of the N02 and sludge formation problems
. are being accelerated.
g) A continuous NO-NO monitor is being fabricated and will be
installed in the tfnk farm condenser vent system.
Backcycling of the 2W waste stream to the HA column feed for
routine product recovery was tried for the third time. Three
consecutive batches of HA feed, containing a total of 35 units
of plutonium from the 2W stream,were processed. High HCW losses,
peaking at 0.93 percent, plus instability in several columns,
resulted. A total of approximately 70 units of plutonium were
lost in the HCW during this test.
After the desirability of sulfuric acid addition to the HCX stream
was established, the nitric acid concentration of the stream was
reduced from 0.1 M to the original 0.01 M flowsheet value and the
1AF nitric addition increased to maintain the lAF acidity. A
slight reduction in the HCW losses was noted.
The sulfuric acid concentration in the HCI stream was increased
to .005 M and decreased in the 2B1 stream to .0035 M. A slight
additional waste loss reduction in the HCW was observed. The
decrease of sulfuric acid to the 2HZ was made to reduce the sulfate
ion concentration in the final product and thus minimize the possi-
bility of plutonium sulfate precipitation in product containers.
Nitric acidity of the 2= was slowly increased from 0.01 M to 0.15 M
to reduce the possibility of a polymer formation in the column. Waste
losses were not affected.
At month end, adjustment of the 2AF acidity by nitric acid addition
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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/m1/20/: accessed May 22, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.