Use of MgO to mitigate the effect of microbial CO{sub 2} production in the Waste Isolation Pilot Plant

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Description

The Waste Isolation Pilot Plant (WIPP), located in a salt bed in southern New Mexico, is designed by US Department of Energy to demonstrate the safe and permanent disposal of design-basis transuranic waste. WIPP performance assessment requires consideration of radionuclide release in brines in the event of inadvertent human intrusion. The mobility of radionuclides depends on chemical factors such as brine pmH (-log molality of H{sup +}) and CO{sub 2} fugacity. According to current waste inventory estimates, a large quantity ({approximately} 10{sup 9} moles C) of organic materials will be emplaced in the WIPP. Those organic material will potentially be ... continued below

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11 p.

Creation Information

Wang, Y.; Brush, L.H. & Bynum, R.V. January 29, 1997.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

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Authors

  • Wang, Y.
  • Brush, L.H. Sandia National Labs., Albuquerque, NM (United States). WIPP Chemical and Disposal Room Dept.
  • Bynum, R.V. SAIC, Inc., Albuquerque, NM (United States)

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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

The Waste Isolation Pilot Plant (WIPP), located in a salt bed in southern New Mexico, is designed by US Department of Energy to demonstrate the safe and permanent disposal of design-basis transuranic waste. WIPP performance assessment requires consideration of radionuclide release in brines in the event of inadvertent human intrusion. The mobility of radionuclides depends on chemical factors such as brine pmH (-log molality of H{sup +}) and CO{sub 2} fugacity. According to current waste inventory estimates, a large quantity ({approximately} 10{sup 9} moles C) of organic materials will be emplaced in the WIPP. Those organic material will potentially be degraded by halophilic or halotolerant microorganisms in the presence of liquid water in the repository, especially if a large volume of brine is introduced into the repository by human intrusions. Organic material biodegradation will produce a large amount of CO{sub 2}, which will acidify the WIPP brine and thus significantly increase the mobility of actinides. This communication addresses (1) the rate of organic material biodegradation and the quantity of CO{sub 2} to be possibly generated, (2) the effect of microbial CO{sub 2} production on overall WIPP performance, and (3) the mechanism of using MgO to mitigate this effect.

Physical Description

11 p.

Notes

INIS; OSTI as DE97004382

Source

  • Waste Management `97, Tucson, AZ (United States), 2-7 Mar 1997

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  • Other: DE97004382
  • Report No.: SAND--97-0271C
  • Report No.: CONF-970335--30
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 453443
  • Archival Resource Key: ark:/67531/metadc679565

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Creation Date

  • January 29, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • June 14, 2016, 1:18 p.m.

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Wang, Y.; Brush, L.H. & Bynum, R.V. Use of MgO to mitigate the effect of microbial CO{sub 2} production in the Waste Isolation Pilot Plant, article, January 29, 1997; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc679565/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.