Numerical studies of rock-gas flow in Yucca Mountain; Yucca Mountain Site Characterization Project

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Description

A computer model (TGIF -- Thermal Gradient Induced Flow) of two-dimensional, steady-state rock-gas flow driven by temperature and humidity differences is described. The model solves for the ``fresh-water head,`` a concept that has been used in models of variable-density water flow but has not previously been applied to gas flow. With this approach, the model can accurately simulate the flows driven by small differences in temperature. The unsaturated tuffs of Yucca Mountain, Nevada, are being studied as a potential site for a repository for high-level nuclear waste. Using the TGIF model, preliminary calculations of rock-gas flow in Yucca Mountain are ... continued below

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119 p.

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Ross, B.; Amter, S. & Lu, Ning February 1, 1992.

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Description

A computer model (TGIF -- Thermal Gradient Induced Flow) of two-dimensional, steady-state rock-gas flow driven by temperature and humidity differences is described. The model solves for the ``fresh-water head,`` a concept that has been used in models of variable-density water flow but has not previously been applied to gas flow. With this approach, the model can accurately simulate the flows driven by small differences in temperature. The unsaturated tuffs of Yucca Mountain, Nevada, are being studied as a potential site for a repository for high-level nuclear waste. Using the TGIF model, preliminary calculations of rock-gas flow in Yucca Mountain are made for four east-west cross-sections through the mountain. Calculations are made for three repository temperatures and for several assumptions about a possible semi-confining layer above the repository. The gas-flow simulations are then used to calculate travel-time distributions for air and for radioactive carbon-14 dioxide from the repository to the ground surface.

Physical Description

119 p.

Notes

INIS; OSTI as DE92010760

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  • Other Information: PBD: Feb 1992

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  • Other: DE92010760
  • Report No.: SAND--91-7034
  • Grant Number: AC04-76DP00789
  • DOI: 10.2172/138372 | External Link
  • Office of Scientific & Technical Information Report Number: 138372
  • Archival Resource Key: ark:/67531/metadc627553

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  • February 1, 1992

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 14, 2016, 9:30 p.m.

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Ross, B.; Amter, S. & Lu, Ning. Numerical studies of rock-gas flow in Yucca Mountain; Yucca Mountain Site Characterization Project, report, February 1, 1992; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc627553/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.