Identification and evaluation of appropriate backfills for the Waste Isolation Pilot Plant (WIPP)

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A backfill system has been designed for the Waste Isolation Pilot Plant (WIPP) which will control the chemical environment of the post-closure repository to a domain where the actinide solubility is within its lowest region. The actinide solubility is highly dependent on the chemical species which constitute the fluid, the resulting pH of the fluid, and the oxidation state of the actinide which is stable under the specific conditions. The use of magnesium oxide (MgO) has the backfill material not only controls the pH of the expected fluids, but also effectively removes carbonate from the system, which has a significant ... continued below

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10 p.

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Bynum, R.V.; Stockman, C. & Papenguth, H. August 1, 1998.

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

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Description

A backfill system has been designed for the Waste Isolation Pilot Plant (WIPP) which will control the chemical environment of the post-closure repository to a domain where the actinide solubility is within its lowest region. The actinide solubility is highly dependent on the chemical species which constitute the fluid, the resulting pH of the fluid, and the oxidation state of the actinide which is stable under the specific conditions. The use of magnesium oxide (MgO) has the backfill material not only controls the pH of the expected fluids, but also effectively removes carbonate from the system, which has a significant impact on actinide solubility. The backfill selection process, emplacement system design, and confirmatory experimental results are presented.

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10 p.

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INIS; OSTI as DE98007117

Source

  • International backfill workshop, Carlsbad, NM (United States), 1 Aug 1998

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  • Other: DE98007117
  • Report No.: SAND--98-1026C
  • Report No.: CONF-980823--
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 661469
  • Archival Resource Key: ark:/67531/metadc707138

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • August 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • June 13, 2016, 7:43 p.m.

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Bynum, R.V.; Stockman, C. & Papenguth, H. Identification and evaluation of appropriate backfills for the Waste Isolation Pilot Plant (WIPP), article, August 1, 1998; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc707138/: accessed December 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.