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Title: Gas flow measurements through consolidating crushed salt.


Abstract not provided.

; ; ; ;  [1];  [1]
  1. (UNM)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the American Rock Mechanics Association Conference held June 28 - July 1, 2015 in San Francisco, CA.
Country of Publication:
United States

Citation Formats

Bauer, Stephen J., Hansen, Francis D., Broome, Scott Thomas, Mills, Melissa Marie, Lampe, Brandon, and Stormont, John. Gas flow measurements through consolidating crushed salt.. United States: N. p., 2015. Web.
Bauer, Stephen J., Hansen, Francis D., Broome, Scott Thomas, Mills, Melissa Marie, Lampe, Brandon, & Stormont, John. Gas flow measurements through consolidating crushed salt.. United States.
Bauer, Stephen J., Hansen, Francis D., Broome, Scott Thomas, Mills, Melissa Marie, Lampe, Brandon, and Stormont, John. 2015. "Gas flow measurements through consolidating crushed salt.". United States. doi:.
title = {Gas flow measurements through consolidating crushed salt.},
author = {Bauer, Stephen J. and Hansen, Francis D. and Broome, Scott Thomas and Mills, Melissa Marie and Lampe, Brandon and Stormont, John},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2015,
month = 3

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  • Abstract not provided.
  • Numerical calculations of disposal room configurations at the Waste Isolation Pilot Plant (WIPP) near Carlsbad, NM are presented. Specifically, the behavior of either crushed salt or a crushed salt-bentonite mixture, when used as a backfill material in disposal rooms, is modeled in conjunction with the creep behavior of the surrounding intact salt. The backfill consolidation model developed at Sandia National Laboratories was implemented into the SPECTROM-32 finite element program. This model includes nonlinear elastic as well as deviatoric and volumetric creep components. Parameters for the models were determined from laboratory tests with deviatoric and hydrostatic loadings. The performance of themore » intact salt creep model previously implemented into SPECTROM-32 is well documented. Results from the SPECTROM-32 analyses were compared to a similar study conducted by Sandia National Laboratories using the SANCHO finite element program. The calculated deformations and stresses from the SPECTROM-32 and SANCHO analyses agree reasonably well despite differences in constitutive models and modeling methodology. These results provide estimates of the backfill consolidation through time. The trends in the backfill consolidation can then be used to estimate the permeability of the backfill and subsequent radionuclide transport. 4 figs.« less
  • Mined salt from the underground facility at the Waste Isolation Pilot Plant (WIPP) Project is a candidate material for use as backfill around the waste packages and in the underground openings during and after the operational phase. We have conducted a series of hydrostatic and triaxial compression experiments on the time-dependent compaction behavior of crushed salt under nominally dry, damp,'' (0.5-5 wt % added water), and brine-saturated conditions. Though the compaction of dry crushed salt is very slow in the laboratory, damp salt is likely to compact as rapidly as the mine walls can converge. Drained tests on brine-saturated crushedmore » salt indicate that, though effects associated with saturation do retard consolidation rates slightly, high fractional densities ({ge}0.95) can still be obtained on laboratory times scales at pressures below lithostatic at the WIPP. Triaxial compression experiments indicate that small deviatoric stresses have little impact on consolidation rates. Micromechanical models for the compaction of dry and damp crushed salt, based on isostatic hot-pressing models, are discussed. 14 refs., 4 figs.« less
  • Using a numerical modeling approach, the authors investigate the characteristics of conductive heat flow and the temperature distribution around a highly conductive salt sheet embedded in a lower conductivity host rock. At large distances from any major lateral variations in conductivity, the solution to the one-dimensional heat flow equation provides an excellent approximation of the full numerical solution. Lateral variability is generally significant, however, and the one-dimensional model should be used carefully. Where lateral changes occur in conductivity, heat flux lines converge to exploit the high-conductivity pathway through the salt. The surface heat flux profile over a low-dip laterally extensivemore » salt sheet of uniform thickness shows a broad asymmetric peak/trough structure centered over the edge of the salt. The magnitude of this effect depends on the thickness and depth of the salt sheet, the contrast in conductivity between salt and the surrounding rocks, the heat flux across basement, and the dip of the salt sheet. At increasing dip angles the surface heat flux assumes a more symmetric form, becoming more like the profile associated with salt diapir.« less