Plutonium VI solubility studies in Savannah River Site high level waste

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Pu(VI) was found to be stable in synthetic SRS waste supernate for periods of at least one month, and have a solubility of the order of 100 mg/l. Electromigration experiments found PU(VI) migrating toward the anode. Irradiation of synthetic waste tank supernate to 5 {times} 10{sup 6} R reduced Pu(VI) in solutions 6M NaOH and less, but had only a minor effect in higher NaOH concentrations. Irradiation did not affect Pu(VI) solubility in high-salt, high-NaOH solutions. Speciation studies found Pu(VI) the major valence of Pu in waste tank supernate solutions; some Pu(IV) is oxidized to Pu(VI) in strongly basic solutions ... continued below

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20 p.

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Karraker, D.G. October 1, 1995.

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Description

Pu(VI) was found to be stable in synthetic SRS waste supernate for periods of at least one month, and have a solubility of the order of 100 mg/l. Electromigration experiments found PU(VI) migrating toward the anode. Irradiation of synthetic waste tank supernate to 5 {times} 10{sup 6} R reduced Pu(VI) in solutions 6M NaOH and less, but had only a minor effect in higher NaOH concentrations. Irradiation did not affect Pu(VI) solubility in high-salt, high-NaOH solutions. Speciation studies found Pu(VI) the major valence of Pu in waste tank supernate solutions; some Pu(IV) is oxidized to Pu(VI) in strongly basic solutions to increase the Pu solubility. It is proposed that oxygen is the oxidizing agent for Pu(IV), with Pu(IV) disproportionation as a less likely possibility.

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20 p.

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INIS; OSTI as DE96001658

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  • Other Information: PBD: [1995]

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  • Other: DE96001658
  • Report No.: WSRC-TR--95-0244
  • Grant Number: AC09-89SR18035
  • DOI: 10.2172/119880 | External Link
  • Office of Scientific & Technical Information Report Number: 119880
  • Archival Resource Key: ark:/67531/metadc624094

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Office of Scientific & Technical Information Technical Reports

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  • October 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 9, 2016, 6:27 p.m.

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Karraker, D.G. Plutonium VI solubility studies in Savannah River Site high level waste, report, October 1, 1995; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc624094/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.