Shear resistance of bentonite backfill materials and their interfaces under varying hydraulic conditions in a deep rock nuclear waste repository

2015 ◽  
Vol 104 ◽  
pp. 211-220 ◽  
Author(s):  
Gowthaman Sinnathamby ◽  
Leena Korkiala-Tanttu ◽  
Laura Torres Salvador
Keyword(s):  
Nuclear Waste ◽  
Shear Resistance ◽  
Nuclear Waste Repository ◽  
Hydraulic Conditions ◽  
Backfill Materials ◽  
Deep Rock ◽  
Waste Repository

Permeability, Swelling and Radionuclide Retardation Properties of Candidate Backfill Materials

1981 ◽  
Vol 6 ◽  
Author(s):  
J. H. Westsik ◽  
L. A. Bray ◽  
F. N. Hodges ◽  
E. J. Wheelwright
Keyword(s):  
Nuclear Waste ◽  
Initial Permeability ◽  
Nuclear Waste Repository ◽  
Dry Density ◽  
Sodium Bentonite ◽  
Backfill Materials ◽  
Waste Repository ◽  
Temperature Radiation ◽  
Bentonite Clays ◽  
Calcium Bentonite

ABSTRACTA backfill placed between a nuclear waste canister and the host geology of a nuclear waste repository can impede the migration of water through the waste package and retard the movement of radionuclides into the geologic formation. Hydraulic conductivities and swelling pressures are being determined as functions of the density of the compacted backfill, temperature, radiation dose, hydraulic head and the chemical composition of the permeating fluid. Bentonite clays and bentonite/sand mixtures have received initial emphasis. Sodium bentonite and calcium bentonite samples compacted to a dry density of 2.1 g/cm3 had hydraulic conductivities in the range of 10−12 to 10−13 cm/s. In addition, batch distribution ratios (Rd) for Sr, Cs, Am, Np, I, U and Tc have been measured for a number of candidatebackfill materials. Both initial permeability and sorption studies have used a synthetic basaltic ground water.

Chemical, Physical and Engineering Characterization Of Candidate Backfill Clays and Clay Admixtures for a Nuclear Waste Respository-Part I

1981 ◽  
Vol 6 ◽  
Author(s):  
Sudesh K. Singh
Keyword(s):  
Nuclear Waste ◽  
Morphological Changes ◽  
Deionized Water ◽  
Engineering Properties ◽  
Nuclear Waste Repository ◽  
Exchange Cation ◽  
Mineral Components ◽  
Waste Repository ◽  
Mineralogical Compositions

ABSTRACTFourteen Canadian clays and clay admixtures were subjected to simulated nuclear waste repository environments. The present work is concerned with the montmorillonite-dominant materials only. The montmorillonite-dominant samples showed significant leaching on interaction with deionized water. On heating the samples at 200°C for 500 hours, montmorillomites lost intermicellar water completely and acquired cusp-like to cylindrical morphologies. The loss of water and the morphological changes in montmorillonites significantly altered the engineering characteristics. Permeability, shrinkage limits, compactability and shear strength varied in response to the dominant exchange cation in the structure of montmorillonites and the presence of other mineral components in the materials. The synthetic granite water reacted with montmorillonites and led to changes in chemical and mineralogical compositions, crystalline state and engineering properties.

Modelling of thermal rock mass properties at the potential sites of a Swedish nuclear waste repository

2009 ◽  
Vol 46 (6) ◽  
pp. 1042-1054 ◽  
Author(s):  
Jan Sundberg ◽  
Pär-Erik Back ◽  
Rolf Christiansson ◽  
Harald Hökmark ◽  
Märta Ländell ◽  
...  
Keyword(s):  
Rock Mass ◽  
Nuclear Waste ◽  
Nuclear Waste Repository ◽  
Rock Mass Properties ◽  
Mass Properties ◽  
Waste Repository
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