Mechanical analyses of WIPP (Waste Isolation Pilot Plant) disposal rooms backfilled with either crushed salt or crushed salt-bentonite

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6197491

Wagner, R A; Callahan, G D ^[1]; Butcher, B M ^[2]

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1. RE/SPEC, Inc., Rapid City, SD (USA)
2. Sandia National Labs., Albuquerque, NM (USA)

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 the 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.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6197491
• Report Number(s): SAND-90-7086C; CONF-901105--79; ON: DE91006638
• Country of Publication: United States
• Language: English

Related Subjects

052002* -- Nuclear Fuels-- Waste Disposal & Storage
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
BACKFILLING
BENTONITE
CLAYS
COMPUTER CODES
CREEP
DEFORMATION
ENVIRONMENTAL TRANSPORT
FUNCTIONAL MODELS
GEOLOGIC DEPOSITS
MANAGEMENT
MASS TRANSFER
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
NATIONAL ORGANIZATIONS
NUCLEAR FACILITIES
PILOT PLANTS
RADIOACTIVE WASTE FACILITIES
RADIOACTIVE WASTE MANAGEMENT
RADIONUCLIDE MIGRATION
S CODES
SALT DEPOSITS
STRESSES
UNDERGROUND FACILITIES
US DOE
US ORGANIZATIONS
WASTE MANAGEMENT
WIPP