Drift scale thermomechanical analysis for thermal loading and retrievability studies

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Currently, the repository portion of the Mined Geologic Disposal System for the disposal of spent nuclear fuel and high level radioactive waste is in the advanced conceptual design (ACD) stage. As a part of the Thermal Loading Systems Study and the Retrievability Period Systems Study, a numerical method was used to estimate the stability of emplacement drifts. Drift stability is an important performance issue, particularly for the concept of a waste package (WP) in an open drift. Drift stability is both a preclosure and postclosure issue. Specifically, preclosure worker safety and WP retrievability can be affected by drift stability. Important ... continued below

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2 p.

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Tsai, F.C. December 31, 1995.

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Description

Currently, the repository portion of the Mined Geologic Disposal System for the disposal of spent nuclear fuel and high level radioactive waste is in the advanced conceptual design (ACD) stage. As a part of the Thermal Loading Systems Study and the Retrievability Period Systems Study, a numerical method was used to estimate the stability of emplacement drifts. Drift stability is an important performance issue, particularly for the concept of a waste package (WP) in an open drift. Drift stability is both a preclosure and postclosure issue. Specifically, preclosure worker safety and WP retrievability can be affected by drift stability. Important postclosure drift stability issues are the potential for rockfall which might damage a WP or the potential formation of cracks and upheaval of rock masses which may alter the hydrologic performance of the repository. In the current study, thermomechanical analyses, using the Discontinuous Deformation Analysis (DDA) numerical code, were performed to support the thermal loading study and the retrievability study. The coupled effects between thermal and mechanical behavior induced by the excavation, thermal loading and rapid cooling were analyzed using rock-mass models. Input data for the jointed-rock pattern, in situ stress condition, and the material properties of intact rock and rock joints were adopted from the Yucca Mountain Site Characterization Project.

Physical Description

2 p.

Notes

INIS; OSTI as DE96008863

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  • 6. annual international conference on high level radioactive waste management, Las Vegas, NV (United States), 30 Apr - 5 May 1995

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  • Other: DE96008863
  • Report No.: CONF-9504179--5
  • Grant Number: AC01-91RW00134
  • Office of Scientific & Technical Information Report Number: 212478
  • Archival Resource Key: ark:/67531/metadc664082

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  • December 31, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Dec. 17, 2015, 12:52 p.m.

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Tsai, F.C. Drift scale thermomechanical analysis for thermal loading and retrievability studies, article, December 31, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc664082/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.