A historical review of Waste Isolation Pilot Plant backfill development

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Backfills have been part of Sandia National Laboratories' [Sandia's] Waste Isolation Pilot Plant [WIPP] designs for over twenty years. Historically, backfill research at Sandia has depended heavily on the changing mission of the WIPP facility. Early testing considered heat producing, high level, wastes. Bentonite/sand/salt mixtures were evaluated and studies focused on developing materials that would retard brine ingress, sorb radionuclides, and withstand elevated temperatures. The present-day backfill consists of pure MgO [magnesium oxide] in a pelletized form and is directed at treating the relatively low contamination level, non-heat producing, wastes actually being disposed of in the WIPP. Its introduction was ... continued below

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15 p.

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KRUMHANSL,JAMES L.; MOLECKE,MARTIN A.; PAPENGUTH,HANS W. & BRUSH,LAURENCE H. June 5, 2000.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Backfills have been part of Sandia National Laboratories' [Sandia's] Waste Isolation Pilot Plant [WIPP] designs for over twenty years. Historically, backfill research at Sandia has depended heavily on the changing mission of the WIPP facility. Early testing considered heat producing, high level, wastes. Bentonite/sand/salt mixtures were evaluated and studies focused on developing materials that would retard brine ingress, sorb radionuclides, and withstand elevated temperatures. The present-day backfill consists of pure MgO [magnesium oxide] in a pelletized form and is directed at treating the relatively low contamination level, non-heat producing, wastes actually being disposed of in the WIPP. Its introduction was motivated by the need to scavenging CO{sub 2} [carbon dioxide] from decaying organic components in the waste. However, other benefits, such as a substantial desiccating capacity, are also being evaluated. The MgO backfill also fulfills a statutory requirement for assurance measures beyond those needed to demonstrate compliance with the US Environmental Protection Agency [EPA] regulatory release limits. However, even without a backfill, the WIPP repository design still operates within EPA regulatory release limits.

Physical Description

15 p.

Notes

INIS; OSTI as DE00756419

Medium: P; Size: 15 pages

Source

  • ICEM Conference, Nagoya (JP), 09/26/1999--09/30/1999

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  • Report No.: SAND2000-1416C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 756419
  • Archival Resource Key: ark:/67531/metadc707818

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  • June 5, 2000

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 7, 2017, 2:59 p.m.

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KRUMHANSL,JAMES L.; MOLECKE,MARTIN A.; PAPENGUTH,HANS W. & BRUSH,LAURENCE H. A historical review of Waste Isolation Pilot Plant backfill development, article, June 5, 2000; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc707818/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.