Development of models for fast fluid pathways through unsaturated heterogeneous porous media

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Description

The pre-waste-emplacement ground water travel time requirement is a regulatory criterion that specifies ground water travel time to the accessible environment shall be greater than 1,000 years. Satisfying the ground water travel time criterion for the potential repository at Yucca Mountain requires the study of fast travel path formation in the unsaturated zone and development of models that simulate the formation of fast paths. Conceptual models for unsaturated flow that have been used for total-systems performance assessment generally fall into the categories of composite-porosity or fracture models. The actual hydrologic conditions at Yucca Mountain are thought to lie somewhere between ... continued below

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112 p.

Creation Information

Robey, T.H. November 1, 1994.

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  • Robey, T.H. Spectra Research Inst., 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 pre-waste-emplacement ground water travel time requirement is a regulatory criterion that specifies ground water travel time to the accessible environment shall be greater than 1,000 years. Satisfying the ground water travel time criterion for the potential repository at Yucca Mountain requires the study of fast travel path formation in the unsaturated zone and development of models that simulate the formation of fast paths. Conceptual models for unsaturated flow that have been used for total-systems performance assessment generally fall into the categories of composite-porosity or fracture models. The actual hydrologic conditions at Yucca Mountain are thought to lie somewhere between the extremes of these two types of models. The current study considers the effects of heterogeneities on composite-porosity models and seeks to develop numerical methods (and models) that can produce locally saturated zones where fracture flow can occur. The credibility of the model and numerical methods is investigated by using test data from the INTRAVAL project (Swedish Nuclear Inspectorate, 1992) to attempt to predict in-situ volumetric water content at specific locations in Yucca Mountain. Work based on the numerical methods presented in this study is eventually intended to allow the calculation of ground water travel times in heterogeneous media. 60 refs.

Physical Description

112 p.

Notes

INIS; OSTI as DE95004269

Source

  • Other Information: PBD: Nov 1994

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  • Other: DE95004269
  • Report No.: SAND--93-7109
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/60736 | External Link
  • Office of Scientific & Technical Information Report Number: 60736
  • Archival Resource Key: ark:/67531/metadc691342

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • November 1, 1994

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • April 13, 2016, 1:32 p.m.

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Robey, T.H. Development of models for fast fluid pathways through unsaturated heterogeneous porous media, report, November 1, 1994; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc691342/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.