Effects of long-term exposure of tuffs to high-level nuclear waste-repository conditions. Preliminary report

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Description

Tests have been performed to explore the effects of extended exposure of tuffs from the southwestern portion of the Nevada Test Site to temperatures and pressures similar to those that will be encountered in a high-level nuclear waste repository. Tuff samples ranging from highly welded, nonzeolitized to unwelded, highly zeolitized varieties were subjected to temperatures of 80, 120, and 180{sup 0}C; confining pressures of 9.7 and 19.7 MPa; and water-pore pressures of 0.5 to 19.7 MPa for durations of 2 to 6 months. The following basic properties were measured before and after exposure and compared: tensile strength, uniaxial compressive strength, ... continued below

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30 p.

Creation Information

Blacic, J.; Carter, J.; Halleck, P.; Johnson, P.; Shankland, T.; Andersen, R. et al. February 1, 1982.

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Description

Tests have been performed to explore the effects of extended exposure of tuffs from the southwestern portion of the Nevada Test Site to temperatures and pressures similar to those that will be encountered in a high-level nuclear waste repository. Tuff samples ranging from highly welded, nonzeolitized to unwelded, highly zeolitized varieties were subjected to temperatures of 80, 120, and 180{sup 0}C; confining pressures of 9.7 and 19.7 MPa; and water-pore pressures of 0.5 to 19.7 MPa for durations of 2 to 6 months. The following basic properties were measured before and after exposure and compared: tensile strength, uniaxial compressive strength, grain density, porosity, mineralogy, permeability, thermal expansion, and thermal conductivity. Depending on rock type and exposure conditions, significant changes in ambient tensile strength, compressive strength, grain density, and porosity were measured. Mineralogic examination, permeability, and thermal property measurements remain to be completed.

Physical Description

30 p.

Notes

NTIS, PC A03/MF A01; OSTI as DE82009549

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  • Other Information: PBD: Feb 1982

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  • Other: DE82009549
  • Report No.: LA--9174-PR
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/59135 | External Link
  • Office of Scientific & Technical Information Report Number: 59135
  • Archival Resource Key: ark:/67531/metadc696551

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Creation Date

  • February 1, 1982

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Feb. 29, 2016, 2:18 p.m.

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Blacic, J.; Carter, J.; Halleck, P.; Johnson, P.; Shankland, T.; Andersen, R. et al. Effects of long-term exposure of tuffs to high-level nuclear waste-repository conditions. Preliminary report, report, February 1, 1982; New Mexico. (digital.library.unt.edu/ark:/67531/metadc696551/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.