Hydrolysis of late-washed, irradiated tetraphenylborate slurry simulants I: Phenylboric acid hydrolysis kinetics Page: 6 of 54
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Westinghouse Savannah River Company WSRC-TR-95-0099TL
Savannah River Technology Center Revision 0
Keywords: DWPF, Salt Process Cell,
Retention Period: 15 years
Reference: Activity No. DWPT-94-0013
TTR No.: HLW/DWPF/TTR-940021
August 21, 1996
D. B. AMERINE, MANAGER/DWPF
ATTENTION: S. F. PICCOLO, 704-S
Hydrolysis of Late-Washed, Irradiated Tetraphenylborate
Slurry Simulants I: Phenylboric Acid Hydrolysis Kinetics (U)
The attached report details the kinetics of phenylboric acid (PBA) reactions at 90 *C during
precipitate hydrolysis processing of late-washed, irradiated tetraphenylborate slurry simulants.
Hydrolysis rate constants and initial phenylboric acid concentrations are reported with 95%
confidence limits. Projected rates of benzene generation from residual phenylboric acid present
in the precipitate reactor immediately after the precipitate transfer is stopped are also reported.
The study covers a wide range of feed properties, including gamma irradiation doses of from 190
to 510 Mrads, mercury concentrations of 0 and 3150 mg/L, nitrite concentrations of from <14 to
> 900 mg/L, and layup irradiation doses of 0 and 46 Mrads. Hydrolysis operating conditions
covered a range of from 0.2 to 0.36 M acidity, copper catalyst concentrations of from 400 to
1200 ppm, and precipitate feedrates of 32 - 51 gpm (scaled to a 3600 gallon batch). The copper
and acidity ranges extend considerably beyond the recommended process operating parameters
(0.25 0.05 M acidity and 950 100 ppm copper) for the DWPF Salt Processing Cell.
Please refer any questions to J. C. Marek (7-7659).
E. W. Holtzscher, Manager
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Marek, J.C. Hydrolysis of late-washed, irradiated tetraphenylborate slurry simulants I: Phenylboric acid hydrolysis kinetics, report, February 10, 2000; South Carolina. (https://digital.library.unt.edu/ark:/67531/metadc705729/m1/6/: accessed April 23, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.