Chloride content of Rocky Flats scrub alloy twelfth campaign solution following head end treatment

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Description

A single batch of dissolver solution from the twelfth Rocky Flats Scrub Alloy (RFSA) campaign has been analyzed for chloride content following head end treatment to reduce its concentration. Scrub alloy buttons were dissolved in Tank 6.4D during July. In subsequent head end processing, chloride was precipitated with mercurous ion added as the nitrate. The precipitate, Hg{sub 2}Cl{sub 2}, was co-removed with the gelatin floc via centrifugation. Duplicate samples from Tank 11.2, containing the head end product, produced excellent agreement between their density measurements and acid analyses, indicating them to be truly representative of the tank`s contents. Duplicate aliquots from ... continued below

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5 p.

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Holcomb, H. P. August 8, 1988.

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Description

A single batch of dissolver solution from the twelfth Rocky Flats Scrub Alloy (RFSA) campaign has been analyzed for chloride content following head end treatment to reduce its concentration. Scrub alloy buttons were dissolved in Tank 6.4D during July. In subsequent head end processing, chloride was precipitated with mercurous ion added as the nitrate. The precipitate, Hg{sub 2}Cl{sub 2}, was co-removed with the gelatin floc via centrifugation. Duplicate samples from Tank 11.2, containing the head end product, produced excellent agreement between their density measurements and acid analyses, indicating them to be truly representative of the tank`s contents. Duplicate aliquots from each of these solutions were analyzed using the turbidimetric chloride method developed in the Separations Technology Laboratory. These resulted in an average chloride value of 53 ppm ({micro}g/mL) chloride for the head end product. Relative standard deviation of the measurement was {+-}6 ppm (n = 4), a precision of {+-}11%. Such a variance is normal at this low chloride level. Since initial chloride values prior to head end averaged 1365 ppm (0.0385M), as analyzed by Laboratories Department, a chloride DF of approximately 26 was obtained. Such a reduced chloride level (to less than 100 ppm) in the treated solution will permit further canyon processing with minimal corrosion.

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5 p.

Notes

OSTI as DE99002880

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  • Other Information: PBD: 8 Aug 1988

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  • Other: DE99002880
  • Report No.: DPSP--88-272-85
  • Grant Number: AC09-89SR18035;AC09-76SR00001
  • DOI: 10.2172/353208 | External Link
  • Office of Scientific & Technical Information Report Number: 353208
  • Archival Resource Key: ark:/67531/metadc678732

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  • August 8, 1988

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • March 23, 2016, 11:05 a.m.

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Holcomb, H. P. Chloride content of Rocky Flats scrub alloy twelfth campaign solution following head end treatment, report, August 8, 1988; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc678732/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.