Drill-back studies examine fractured, heated rock

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To investigate the effects of heating on the mineralogical, geochemical, and mechanical properties of rock by high-level radioactive waste, cores are being examined from holes penetrating locations where electric heaters simulated the presence of a waste canister, and from holes penetration natural hydrothermal systems. Results to date indicate the localized mobility and deposition of uranium in an open fracture in heated granitic rock, the mobility of U in a breccia zone in an active hydrothermal system in tuff, and the presence of U in relatively high concentration in fracture-lining material in tuff. Mechanical -- property studies indicate that differences in ... continued below

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8 p.

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Wollenberg, H.A.; Flexser, S. & Myer, L.R. January 1, 1990.

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Description

To investigate the effects of heating on the mineralogical, geochemical, and mechanical properties of rock by high-level radioactive waste, cores are being examined from holes penetrating locations where electric heaters simulated the presence of a waste canister, and from holes penetration natural hydrothermal systems. Results to date indicate the localized mobility and deposition of uranium in an open fracture in heated granitic rock, the mobility of U in a breccia zone in an active hydrothermal system in tuff, and the presence of U in relatively high concentration in fracture-lining material in tuff. Mechanical -- property studies indicate that differences in compressional- and shear-wave parameters between heated and less heated rock can be attributed to differences in the density of microcracks. Emphasis has shifted from initial studies of granitic rock at Stripa, Sweden to current investigations of welded tuff at the Nevada Test Site. 7 refs., 8 figs.

Physical Description

8 p.

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INIS; OSTI as DE90009198

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  • 1. international topical meeting on high-level radioactive waste management, Las Vegas, NV (United States), 8-12 Apr 1990

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  • Other: DE90009198
  • Report No.: LBL--28336
  • Report No.: CONF-900406--56
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 137704
  • Archival Resource Key: ark:/67531/metadc619720

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  • January 1, 1990

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  • June 16, 2015, 7:43 a.m.

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  • April 4, 2016, 9:18 p.m.

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Wollenberg, H.A.; Flexser, S. & Myer, L.R. Drill-back studies examine fractured, heated rock, article, January 1, 1990; California. (digital.library.unt.edu/ark:/67531/metadc619720/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.