Coupled THM analysis of the single-heater test at yucca mountain

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This paper presents a summary of results from the Single-Heater Test (SHT) at Yucca Mountain, Nevada. In the SHT, a horizontal, 5-m-long, line-heat source was used to heat a rock pillar for nine months. Moisture movement was monitored during and after heating using electrical-resistance tomography (ERT) and neutron-logging techniques. Results indicate drying in regions of the rock where temperature reached 60°C and above. The drying zone is asymmetric and is not centered on the heater, but has lobes extending above and to the sides of the heater. Predicted temperatures agreed well with observations. A cold- trap effect was predicted, in ... continued below

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Blair, S C; Buscheck, T A; Daily, W D; Lin, W & Ramirez, A L January 25, 1999.

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Description

This paper presents a summary of results from the Single-Heater Test (SHT) at Yucca Mountain, Nevada. In the SHT, a horizontal, 5-m-long, line-heat source was used to heat a rock pillar for nine months. Moisture movement was monitored during and after heating using electrical-resistance tomography (ERT) and neutron-logging techniques. Results indicate drying in regions of the rock where temperature reached 60°C and above. The drying zone is asymmetric and is not centered on the heater, but has lobes extending above and to the sides of the heater. Predicted temperatures agreed well with observations. A cold- trap effect was predicted, in the heater borehole, that efficiently transfers heat along the heater borehole to the excavation wall. A simple thermomechanical analysis of the SHT shows that shear zones predicted for vertical fractures coincide with regions of increased moisture content derived from ERT measurements.

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1.2 Megabytes

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  • 37th U.S. Rock Mechanics Symposium, Vail, CO, June 6-9, 1999

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  • Other: DE00007722
  • Report No.: UCRL-JC-132052
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 7722
  • Archival Resource Key: ark:/67531/metadc719035

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  • January 25, 1999

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  • Sept. 29, 2015, 5:31 a.m.

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  • Feb. 23, 2016, 7:52 p.m.

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Blair, S C; Buscheck, T A; Daily, W D; Lin, W & Ramirez, A L. Coupled THM analysis of the single-heater test at yucca mountain, article, January 25, 1999; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc719035/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.