Yucca Mountain thermal response: An evaluation of the effects of modeled geologic structure and thermal property descriptions

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Description

To assess the influence of mountain-scale thermal property model variations on predicted host-rock thermal response, a series of heat conduction calculations were run using a representative two-dimensional cross section of Yucca Mountain. The effects of modeled geologic structure were evaluated through comparisons of results from a single-material, homogeneous model with those from a uniformly layered model, a discontinuous sloping-layered model, and a geo-statistical realization of thermal properties. Comparisons indicate that assumed geologic structure can result in up to a 24{degrees}C difference in predicted temperature response. Further, thermal simulations of the method used to analyze geostatistical realizations of thermal properties shows ... continued below

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135 p.

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Longenbaugh, R.; Rautman, C. A. & Ryder, E. E. September 1995.

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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

To assess the influence of mountain-scale thermal property model variations on predicted host-rock thermal response, a series of heat conduction calculations were run using a representative two-dimensional cross section of Yucca Mountain. The effects of modeled geologic structure were evaluated through comparisons of results from a single-material, homogeneous model with those from a uniformly layered model, a discontinuous sloping-layered model, and a geo-statistical realization of thermal properties. Comparisons indicate that assumed geologic structure can result in up to a 24{degrees}C difference in predicted temperature response. Further, thermal simulations of the method used to analyze geostatistical realizations of thermal properties shows promise as an efficient means of capturing geologic structure without the complexities of intricate finite element meshing. The functional representation of two thermal property models were also investigated. The first examines the effect of using a weighting scheme to define properties for a single, homogenous material model. The second investigates the impact of thermal property temperature dependence on predicted response. As with the investigation of geologic structure, noticeable differences in predicted temperatures (up to 29{degrees}C) were found to result.

Physical Description

135 p.

Notes

INIS; OSTI as DE96001803

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  • Other Information: PBD: Sep 1995

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  • Other: DE96001803
  • Report No.: SAND--94-2247
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/123209 | External Link
  • Office of Scientific & Technical Information Report Number: 123209
  • Archival Resource Key: ark:/67531/metadc625370

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  • September 1995

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  • June 16, 2015, 7:43 a.m.

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  • April 14, 2016, 8:53 p.m.

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Longenbaugh, R.; Rautman, C. A. & Ryder, E. E. Yucca Mountain thermal response: An evaluation of the effects of modeled geologic structure and thermal property descriptions, report, September 1995; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc625370/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.