Site Geology

Proximity to critical areas specified in government regulations, accessihiUty, site geology and hydrology. 

LeHuray, A.P., Church, S.E., Koski, R.A. and Bouse, R.M. (1988) Pb isotopes in sulfides from midocean ridge hydrothermal sites. Geology, 16, 362-365. 

The ABS will not degrade inorganic or synthetic compounds. The technology s efficiency varies with temperature, moisture, site geological, and chemical characteristics. A biotreatability study may be required to determine a treatment application. 

SPSH has several potential limitations. The site geology must be amenable to the installation of electrodes. The presence of underground pipes or utilities, buried metal debris, or other conductive objects may present a safety hazard. There is also no established treatment depth limit, but it is generally accepted that SPSH can treat the top of the water table. In addition, this technology may not be effective at sites with highly saturated soUs. 

Risk Assessment. The overall compilation and assessment of the factors that must be considered in designing and siting geologic repositories is pulled together in a general discipline of risk assessment. Risk assessment calculations develop both generic and site specific models and calculate the potential transport times as a result of various phenomena. Calculations are being... 

The large-scale bouyancy effects of an idealized heated repository have also been calculated (6). Expansion of the heated salt will result in a density differential with respect to the surrounding salt. This plus the reduced viscosity of the hot salt tends to form slow convective cells in the salt. Calculations of a repository in homogeneous salt loaded with 10-year old HLW at 100 kilowatts per acre show a peak upward velocity (approximately 1.5 cm/year) of the repository horizon would occur between 200 and 300 years and then slowly decrease. Displacement would be about 6.5 meters at 400 years. Incorporating a more viscous layer above the repository level to more closely simulate the actual WIPP site geology leads to maximum velocities about one-third those obtained in homogeneous salt. After 400 years the upward displacement for this latter case would be about 2.1 meters. More... 

Site Geological Unit Age (Ma) Present Elevation (m) Calculated Paleoelevation and change(m) Coordinates (W,N) Plow Thickness (m) Location... 

LeHuray AP, Church SE, Koski RA, Bouse RM (1988) Pb isotope ratios in sulfides from mid-ocean ridge hydrothermal sites. Geology 16 362-365... 

Keusen, H.R., Ganguin, J., Schuler, P., and Buletti, M.. Grimsel Test Site. Geology. NAGRA, NTB 87-14E, 1989. 

Landfill restoration is not a "one-off process, but one that requires monitoring and control for as long as there is an associated risk to the environment. The nature and extent of the risk will be determined by factors such as the type of waste, historical operating procedures, site geology and hydrogeology, and the location and sensitivity of receptors that may be affected by the potential emissions from the restored landfill. There is little scope within this... 

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