Vitrified magnesia dissolution and its impact on plutonium residue processing

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Description

Aqueous chloride operations at the Los Alamos Plutonium Facility cannot directly dispose of acidic waste solutions because of compatibility problems with existing disposal lines. Consequently, all hydrochloric acid must be neutralized and filtered prior to exiting the facility. From a waste minimization standpoint, the use of spent magnesia pyrochemical crucibles as the acid neutralization agent is attractive since this process would take a stream destined for transuranic waste and use it as a reagent in routine plutonium residue processing. Since Los Alamos National Laboratory has several years of experience using magnesium hydroxide as a neutralizing agent for waste acid from ... continued below

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17 p.

Creation Information

Fife, Keith W.; Alwin, Jennifer L.; Smith, Coleman A.; Mayne, Michael D. & Rockstraw, David A. March 1, 2000.

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Description

Aqueous chloride operations at the Los Alamos Plutonium Facility cannot directly dispose of acidic waste solutions because of compatibility problems with existing disposal lines. Consequently, all hydrochloric acid must be neutralized and filtered prior to exiting the facility. From a waste minimization standpoint, the use of spent magnesia pyrochemical crucibles as the acid neutralization agent is attractive since this process would take a stream destined for transuranic waste and use it as a reagent in routine plutonium residue processing. Since Los Alamos National Laboratory has several years of experience using magnesium hydroxide as a neutralizing agent for waste acid from plutonium processing activities, the use of spent magnesia pyrochemical crucibles appeared to be an attractive extension of this activity. In order to be competitive with magnesium hydroxide, however, size reduction of crucible shards had to be performed effectively within the constraints of glovebox operations, and acid neutralization time using crucible shards had to be comparable to neutralization times observed when using reagent-grade magnesium hydroxide. The study utilized non-plutonium-contaminated crucibles for equipment evaluation and selection and used nonradioactive acid solutions for completing the neutralization experiments. This paper discusses experience in defining appropriate size reduction equipment and presents results from using the magnesia crucibles for hydrochloric acid neutralization, a logical precursor to introduction into glovebox enclosures.

Physical Description

17 p.

Notes

INIS; OSTI as DE00752671

Medium: P; Size: 17 pages

Source

  • Other Information: PBD: 1 Mar 2000

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  • Report No.: LA-13680-MS
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/752671 | External Link
  • Office of Scientific & Technical Information Report Number: 752671
  • Archival Resource Key: ark:/67531/metadc709883

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  • March 1, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 7, 2017, 3:44 p.m.

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Fife, Keith W.; Alwin, Jennifer L.; Smith, Coleman A.; Mayne, Michael D. & Rockstraw, David A. Vitrified magnesia dissolution and its impact on plutonium residue processing, report, March 1, 2000; Los Alamos, New Mexico. (digital.library.unt.edu/ark:/67531/metadc709883/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.