Sodium tetraphenylborate solution stability: A long term study

Technical Report · Thu Jun 11 04:00:00 EDT 1992

DOI:https://doi.org/10.2172/6693528· OSTI ID:6693528

Barnes, M J

Sodium tetraphenylborata (NaTPB) is a specialty chemical required for the In Tank Precipitation Process (ITP). It precipitates cesium, aiding in the decontamination of high level radioactive waste solutions. Long term stability of aqueous alkaline solutions of NATPB has been investigated. The focus of the investigation is on the relative stabilities of NATPB solutions exposed to varying temperatures and copper concentrations over an extended period of time. Additionally, vendor-supplied samples, incubated at 40[degree]C, were stored for more than a year without decomposing. Collected data demonstrates that in the absence of elevated copper concentrations, NATPB solutions will remain stable for periods of 1 to 2 years (at a minimum) at maximum expected operating conditions (<40[degree]C). Additionally, biuret, (H[sub 2]NCO)[sub 2]NH, was tested as an additive to prevent copper-induced decomposition without success.

• Research Organization: Westinghouse Savannah River Co., Aiken, SC (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC09-89SR18035
• OSTI ID: 6693528
• Report Number(s): WSRC-RP-92-786; ON: DE93008504
• Country of Publication: United States
• Language: English

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ACID NEUTRALIZING CAPACITY
ALKALI METAL COMPOUNDS
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US DOE
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