Modeling water seepage into heated waste emplacement drifts at Yucca Mountain

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This paper describes numerical prediction of the coupled thermal-hydrological processes (TH) in the vicinity of waste emplacement drifts during the heating phase of the proposed geologic repository for nuclear waste at Yucca Mountain, Nevada. Heating of rock water to above-boiling conditions induces water saturation changes and perturbed water fluxes that affect the potential of water seepage into drifts. In addition to the capillary barrier at the rock-drift interface--independent of the thermal conditions--a second barrier exists to downward percolation at above-boiling conditions. This barrier is caused by vaporization of water in the fractured rock overlying the repository. A TOUGH2 simulation model ... continued below

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7 pages

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Birkholzer, Jens; Mukhophadhyay, Sumit & Tsang, Yvonne April 14, 2003.

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Description

This paper describes numerical prediction of the coupled thermal-hydrological processes (TH) in the vicinity of waste emplacement drifts during the heating phase of the proposed geologic repository for nuclear waste at Yucca Mountain, Nevada. Heating of rock water to above-boiling conditions induces water saturation changes and perturbed water fluxes that affect the potential of water seepage into drifts. In addition to the capillary barrier at the rock-drift interface--independent of the thermal conditions--a second barrier exists to downward percolation at above-boiling conditions. This barrier is caused by vaporization of water in the fractured rock overlying the repository. A TOUGH2 simulation model was developed to analyze the combined effect of these two barriers; it accounts for all relevant TH processes in response to heating, while incorporating the capillary barrier condition at the drift wall. Model results are presented for a variety of simulation cases.

Physical Description

7 pages

Notes

INIS; OSTI as DE00813582

Source

  • TOUGH2 Symposium 2003, Berkeley, CA (US), 05/12/2003--05/14/2003

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  • Report No.: LBNL--52500
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 813582
  • Archival Resource Key: ark:/67531/metadc738910

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • April 14, 2003

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • April 4, 2016, 4:21 p.m.

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Birkholzer, Jens; Mukhophadhyay, Sumit & Tsang, Yvonne. Modeling water seepage into heated waste emplacement drifts at Yucca Mountain, article, April 14, 2003; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc738910/: accessed December 13, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.