Chemical Processing Department Monthly Report: July 1957 Page: 87 of 107
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Research and Engineering HW-51802-"
4. Accidental shorting of the pressure chamber probe caused ejection of
the resin from the exchange equipment. The same possibility exists
in the Purex equipment and suitable precautions should be taken. This
phenomenon could be made use of for column emptying, provided a suit-
able receiver and piping are provided. Nuclear safety of such a re-
ceiver would need investigation.
5. Gassing occurred in the XA column on several occasions due to inade-
quate temperature control. Gassing in the XC column occurred upon
heating to 80 C, with deposition of plutonium polymer on the resin. A
run at 70 C was satisfactory in all respects.
6. Low acidity of the feed (5 M HN3 or lower) seriously decreases IA
column capacity and increases waste losses. In event of lower acidity
feeds, the operating temperature should be increased to improve kinetics
of the absorption.
7. The product may be decontaminated from Zr-Nb activity (DF = 250 or
better) with moderate XAS flow (XAS/XAI = 2.5 or better). Ru-Rh
activity is less effectively removed (DF = 30 or better at above scrub
rates). Inadequate scrub flow lessens decontamination effectiveness.
8. Resin accumulates appreciable fission product activity on continued
usage. Scrubbing removes this activity only slowly. The available
data are as follows:
Approximate Activity, T/min/ml
Hours of Operation Zr-Nb Ru-Rh
26 2.2x105 1.6x105
38 1.0x106 9.0x105
After 8 hours
elution and scrubbing 4.hx105 5.6x105
9. Removal of metallic impurities was effective to the extent of
5 - 100-fold reduction. Improvement should be expected with more
Slip casting tests with calcium fluoride were continued. Ball milling periods
of 24, 18, 12, and 8 hours were tried using -48 mesh calcium fluoride calcined
at 1200 C, defloculated with Daxad. Twelve hours seems to be most satisfactory.
Tests to eliminate blister formation by adjusting the firing conditions are now
In support of continuous Task III, a pattern for a ceramic reduction cell was
designed, and plaster molds were being made at the end of the month. Earlier
in the month IS-5 magnesia thistle tubes (small bore diameter 0.3 inch) were
successfully made for use in the reduction cell.
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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/m1/87/: accessed May 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.