creep behavior. Furthermore, this creep behavior is a function of water content and temperature and so these processes must also be taken into account and, thus, continued research and development is needed in this area. . Relative Attributes of Alternative Media for Geologic Disposal (BMWI 2008; Stenhouse et al. 2010, Figure 7-5; Hansen et al. 2010b, Table 1). Characteristic Salt Clay/Shale Crystalline Geologic Borehole Media Property Thermal conductivity High Low Moderate Moderate Heat resistance High Low High High Permeability Practically Very low to low Low (unfractured) Very low impermeable High (fractured) Sorption behavior Very low Very high Moderate Moderate Dissolution Very high Very low Very low Very low Chemical Reducing Reducing Reducing Reducing Deformation behavior Visco-plastic Plastic Brittle Brittle Strength Medium Low to medium High High In-situ stress Isotropic Anisotropic Anisotropic Anisotropic Homogeneity High Moderate Moderate Moderate Location dependent Geologic stability in High High High High US Availability in US Wide Wide Medium Wide Resource coexistence High Medium Low Low Repository design Mining experience High Low High Low Cavity stability Self-support on Reinforcement High Low to Medium decade scale required (unfractured) at great depth Low (fractured) Repository seals Needed Needed Needed Needed Waste package Minimal Minimal Needed Minimal Key for attributes Favorable Average Unfavorable
creep behavior. Furthermore, this creep behavior is a function of water content and temperature and so these processes must also be taken into account and, thus, continued research and development is needed in this area. . Relative Attributes of Alternative Media for Geologic Disposal (BMWI 2008; Stenhouse et al. 2010, Figure 7-5; Hansen et al. 2010b, Table 1). Characteristic Salt Clay/Shale Crystalline Geologic Borehole Media Property Thermal conductivity High Low Moderate Moderate Heat resistance High Low High High Permeability Practically impermeable Very low to low Low (unfractured) High (fractured) Very low Sorption behavior Very low Very high Moderate Moderate Dissolution Very high Very low Very low Very low Chemical Reducing Reducing Reducing Reducing Deformation behavior Visco-plastic Plastic Brittle Brittle Strength Medium Low to medium High High In-situ stress Isotropic Anisotropic Anisotropic Anisotropic Homogeneity High Moderate Moderate Moderate Location dependent Geologic stability in US High High High High Availability in US Wide Wide Medium Wide Resource coexistence High Medium Low Low Repository design Mining experience High Low High Low Cavity stability Self-support on decade scale Reinforcement required High (unfractured) Low (fractured) Low to Medium at great depth Repository seals Needed Needed Needed Needed Waste package Minimal Minimal Needed Minimal Key for attributes Favorable Average Unfavorable
Basis%20for%20Identification%20of%20Disposal%20Options%20for%20UFD%20FY11.docx