PROCESSING ALTERNATIVES FOR DESTRUCTION OF TETRAPHENYLBORATE

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Two processes were chosen in the 1980's at the Savannah River Site (SRS) to decontaminate the soluble High Level Waste (HLW). The In Tank Precipitation (ITP) process (1,2) was developed at SRS for the removal of radioactive cesium and actinides from the soluble HLW. Sodium tetraphenylborate was added to the waste to precipitate cesium and monosodium titanate (MST) was added to adsorb actinides, primarily uranium and plutonium. Two products of this process were a low activity waste stream and a concentrated organic stream containing cesium tetraphenylborate and actinides adsorbed on monosodium titanate (MST). A copper catalyzed acid hydrolysis process was ... continued below

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Lambert, D; Thomas Peters, T & Samuel Fink, S February 27, 2007.

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Two processes were chosen in the 1980's at the Savannah River Site (SRS) to decontaminate the soluble High Level Waste (HLW). The In Tank Precipitation (ITP) process (1,2) was developed at SRS for the removal of radioactive cesium and actinides from the soluble HLW. Sodium tetraphenylborate was added to the waste to precipitate cesium and monosodium titanate (MST) was added to adsorb actinides, primarily uranium and plutonium. Two products of this process were a low activity waste stream and a concentrated organic stream containing cesium tetraphenylborate and actinides adsorbed on monosodium titanate (MST). A copper catalyzed acid hydrolysis process was built to process (3, 4) the Tank 48H cesium tetraphenylborate waste in the SRS's Defense Waste Processing Facility (DWPF). Operation of the DWPF would have resulted in the production of benzene for incineration in SRS's Consolidated Incineration Facility. This process was abandoned together with the ITP process in 1998 due to high benzene in ITP caused by decomposition of excess sodium tetraphenylborate. Processing in ITP resulted in the production of approximately 1.0 million liters of HLW. SRS has chosen a solvent extraction process combined with adsorption of the actinides to decontaminate the soluble HLW stream (5). However, the waste in Tank 48H is incompatible with existing waste processing facilities. As a result, a processing facility is needed to disposition the HLW in Tank 48H. This paper will describe the process for searching for processing options by SRS task teams for the disposition of the waste in Tank 48H. In addition, attempts to develop a caustic hydrolysis process for in tank destruction of tetraphenylborate will be presented. Lastly, the development of both a caustic and acidic copper catalyzed peroxide oxidation process will be discussed.

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  • International Conference on Incineration and Thermal Treatment Technologies Conference, May 14-18, 2007, Phoenix, AZ

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  • Report No.: WSRC-STI-2007-00107
  • Grant Number: DE-AC09-96SR18500
  • Office of Scientific & Technical Information Report Number: 901917
  • Archival Resource Key: ark:/67531/metadc887847

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  • February 27, 2007

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 2, 2016, 1:02 p.m.

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Lambert, D; Thomas Peters, T & Samuel Fink, S. PROCESSING ALTERNATIVES FOR DESTRUCTION OF TETRAPHENYLBORATE, article, February 27, 2007; [Aiken, South Carolina]. (digital.library.unt.edu/ark:/67531/metadc887847/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.