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Migration of radionuclides in fissured rock: The influence of micropore diffusion and longitudinal dispersion
IO?A
behaviour of the tuffs was the recoverability 1)etween stress cycles, this was not observed for other equally l~rous rocks llke sandstone and for partially saturated granite. Electrically sensitive ruffs near active faults might be used in earthquake prediction studies provided field sites in partially saturate~ %uzrs c~n be rouna.
825~7
T H ~ CONDUCTIVI~T, D I F F U S M T Y AND SPECIFIC HEAT VARIATION OF SONE TRAVAI~ H E L D (TUSCANY) ROCKS VH~SUS T~PERATURE Mongelli, F; Loddo, M; Tramacere~ A Teetor~physics, V83, N1-2, i0 March 1962,
P33-~3 Thermal parameters of eight rock samples (limestone, calcareous dolomite, quartzite, micaceous quartzite, phyllite, mieaceous schistose quartzite, plagioclasic mlcaschists, g~miss)have been measured by the transient state cut-core method at temp~atures ra~ging from 20 to 250 deg C. An average 22 per cent decrease for the conductivity, 34 per cent decrease for the diffusivity, and 19 per cent increase for the specific heat have been observed. From a geothermal point of view (heat extraction frem hot dry rocks) the most promising rocks are mic aschi st s.
825068 EFFECTS OF ±~NNEALING AND CONCelebRATION ON THE HYSTERESIS PROPERTIES OF MAGNETITE AR0t%D THE PSD-MD TRANSITION Dankers, P; Sugiura, N Earth Planet Sci Lett, 756, Dec 1981, I~22-428
Permeability and capillarity 82f,o69
~ S I C A L PROPERTIES OF SOIL PARTICLES AND THEIR EFFECT ON HYDRAULIC CONDUCTIVITY OF UNSATURATED DECOMPOSED GRANITE SOIL 2., Matsuo, S; Nishida, K; Sasaki, S Soils FOuni, VZl, N % Dee i ~ I , PI--z Experiments to stt~iy the effects of water content 8/Id speoi1"ic surfsce area Ol the soil particles on the hydraulic conductivlty were carried out. Water content determinations were made using a gan~na r~y %o01 attached to the permeability test al~aratus amd specific surface area was calculated from the pore size integral curve obtained using a mercury pressure porosimeter. Hydraulic cor~uctivity can he related to volumetric water content and specific surface area which have close connections with the degree of weathering of the soil.
8z507o ~ D Y
OF INT~RGRANULAR AND F I ~ U R E P~HMF~ILITY IN ~ AND P~qMIAN AOUIFERS, USING DOL,~LS-~ACKER INJECTION TESTING Price I M; Morris, B; Robertson, A J Hydrol, 754, N~ s Jan 1982, I~01-423
Double-packer injection tests have been carried out in a borshole in the Chalk of Hampshire and a borehole in the Permian Penrith Sandstone of Cumbria, England. The tests have been s u ~ e mented by borshole logging and television inspeetions and by laboratory measur~nents on ceres. A new mathematical treatment has enabled results to be calculated for injection test intervals Containing fissures. In both formations, transmissivity in~edlately arour~ the borehole is dominated by a few major fissures. In the Per~ith Samdstone t h e r e is good agreement between intergranular hydraulic conductivity measurements anl pack,-test results in the portions
of the borshole which do not contain major fissures. In the Chalk, the packer-test values are always higher than the intergranular measurements, sugges%img that s~ae degree of fissuring is present throughout. Aut~. 825071 EFFECT OF FAULT-RELATED GRANULATION ON POROSITY AND PERMEABILITY OF QUARTZ SANDSTOEES, SIMPSON
GROUP (m~OVICIAN), O ~ A H ~ A Pittmann, E D Am Ass Petrol Geol Bull, V65, NIl, Nov 1981 , P2381- 2387 Reports optical and scanning electron microscope studies of samples from disturbed zones along faults and from undisturbed strata adSacent to faults. The study relates to oil reservoir porosity and permeability and the entrapment of hydrocarbons. 825072 HYDRO~ECHANICAL BEHAVIOUR OF A DEFORMABLE ROCK FRACTURE SUBJECT TO NORMAL SEqESS Tsang, Y W; Witherspoon, P A J Geophys Res, 786, NB10, l0 Oct 1981,
1:'9287-9298 This paper is an attempt to develop a basic understanding of flow through fractured rock masses that are umder stress. The hydrcmechamlcal coupled system chosen is a single horizontal ro~ghwalled fracture under normsl stress. The theory (1) relates the mechanical properties of the fractured rock to the geometrical characterisation of the rough~mlled fracture, (2) modifies the equation describing flow through a fracture with smooth parallel walls to include the effect of the roughness of the fracture surfaces, amd (3) predicts the flow rate as a function of normal stress on the fractured rock. The theory is validated against laboratory experiments with radial flow through single fractures in granite ar~ basalt cores. 825073 MIGRATION OF RADIONUCLIDES THE INFLUENCE OF MICROPORE LONGITUDINAL DISPERSION Rasmuson, A; Neretnieks, J Geophys Res, 786, NBS,
IN FISSURED ROCK: DIFFUSION AND I i0 May 1981, P3749-3758
The migration of radlonuclides in the fissures in the bedrock surrounding a repositary is discussed. A one-dimensional transport model is Iresented. It includes diffusion of the nuclides into the microfissures of the rock, and linear sorption, amd lomgitudinal dispersion in the bedrock. DimensiorLless breakthrough curves are given fc~ the aPl~Oxlmate rarge of variation of the input parameters. Calculations are made for a repository of spent fuel surrounded by fissured but fairly good rock. Longitudinal dispersion may significantly affect the amount of radioactive material reaching the biosphere. Dispersion effects of the magnitude considered in this study can significantly diminish the retardation effects of matrix diffusion. 825074 P~%MEABILITY OF GRANITE IN A TEMPERATURE GRADIENT Morrow, C; Lockner, D; Moore, D J Geol~lYS Res, V86, N ~ , I0 April 1981, P3002-3008 Changes in permeability of granite were measured as water flowed through samples in a temperature gradient. The experimental conditions simulated those around the 'very deep hole concept' nuclear
behaviour of the tuffs was the recoverability 1)etween stress cycles, this was not observed for other equally l~rous rocks llke sandstone and for partially saturated granite. Electrically sensitive ruffs near active faults might be used in earthquake prediction studies provided field sites in partially saturate~ %uzrs c~n be rouna.
825~7
T H ~ CONDUCTIVI~T, D I F F U S M T Y AND SPECIFIC HEAT VARIATION OF SONE TRAVAI~ H E L D (TUSCANY) ROCKS VH~SUS T~PERATURE Mongelli, F; Loddo, M; Tramacere~ A Teetor~physics, V83, N1-2, i0 March 1962,
P33-~3 Thermal parameters of eight rock samples (limestone, calcareous dolomite, quartzite, micaceous quartzite, phyllite, mieaceous schistose quartzite, plagioclasic mlcaschists, g~miss)have been measured by the transient state cut-core method at temp~atures ra~ging from 20 to 250 deg C. An average 22 per cent decrease for the conductivity, 34 per cent decrease for the diffusivity, and 19 per cent increase for the specific heat have been observed. From a geothermal point of view (heat extraction frem hot dry rocks) the most promising rocks are mic aschi st s.
825068 EFFECTS OF ±~NNEALING AND CONCelebRATION ON THE HYSTERESIS PROPERTIES OF MAGNETITE AR0t%D THE PSD-MD TRANSITION Dankers, P; Sugiura, N Earth Planet Sci Lett, 756, Dec 1981, I~22-428
Permeability and capillarity 82f,o69
~ S I C A L PROPERTIES OF SOIL PARTICLES AND THEIR EFFECT ON HYDRAULIC CONDUCTIVITY OF UNSATURATED DECOMPOSED GRANITE SOIL 2., Matsuo, S; Nishida, K; Sasaki, S Soils FOuni, VZl, N % Dee i ~ I , PI--z Experiments to stt~iy the effects of water content 8/Id speoi1"ic surfsce area Ol the soil particles on the hydraulic conductivlty were carried out. Water content determinations were made using a gan~na r~y %o01 attached to the permeability test al~aratus amd specific surface area was calculated from the pore size integral curve obtained using a mercury pressure porosimeter. Hydraulic cor~uctivity can he related to volumetric water content and specific surface area which have close connections with the degree of weathering of the soil.
8z507o ~ D Y
OF INT~RGRANULAR AND F I ~ U R E P~HMF~ILITY IN ~ AND P~qMIAN AOUIFERS, USING DOL,~LS-~ACKER INJECTION TESTING Price I M; Morris, B; Robertson, A J Hydrol, 754, N~ s Jan 1982, I~01-423
Double-packer injection tests have been carried out in a borshole in the Chalk of Hampshire and a borehole in the Permian Penrith Sandstone of Cumbria, England. The tests have been s u ~ e mented by borshole logging and television inspeetions and by laboratory measur~nents on ceres. A new mathematical treatment has enabled results to be calculated for injection test intervals Containing fissures. In both formations, transmissivity in~edlately arour~ the borehole is dominated by a few major fissures. In the Per~ith Samdstone t h e r e is good agreement between intergranular hydraulic conductivity measurements anl pack,-test results in the portions
of the borshole which do not contain major fissures. In the Chalk, the packer-test values are always higher than the intergranular measurements, sugges%img that s~ae degree of fissuring is present throughout. Aut~. 825071 EFFECT OF FAULT-RELATED GRANULATION ON POROSITY AND PERMEABILITY OF QUARTZ SANDSTOEES, SIMPSON
GROUP (m~OVICIAN), O ~ A H ~ A Pittmann, E D Am Ass Petrol Geol Bull, V65, NIl, Nov 1981 , P2381- 2387 Reports optical and scanning electron microscope studies of samples from disturbed zones along faults and from undisturbed strata adSacent to faults. The study relates to oil reservoir porosity and permeability and the entrapment of hydrocarbons. 825072 HYDRO~ECHANICAL BEHAVIOUR OF A DEFORMABLE ROCK FRACTURE SUBJECT TO NORMAL SEqESS Tsang, Y W; Witherspoon, P A J Geophys Res, 786, NB10, l0 Oct 1981,
1:'9287-9298 This paper is an attempt to develop a basic understanding of flow through fractured rock masses that are umder stress. The hydrcmechamlcal coupled system chosen is a single horizontal ro~ghwalled fracture under normsl stress. The theory (1) relates the mechanical properties of the fractured rock to the geometrical characterisation of the rough~mlled fracture, (2) modifies the equation describing flow through a fracture with smooth parallel walls to include the effect of the roughness of the fracture surfaces, amd (3) predicts the flow rate as a function of normal stress on the fractured rock. The theory is validated against laboratory experiments with radial flow through single fractures in granite ar~ basalt cores. 825073 MIGRATION OF RADIONUCLIDES THE INFLUENCE OF MICROPORE LONGITUDINAL DISPERSION Rasmuson, A; Neretnieks, J Geophys Res, 786, NBS,
IN FISSURED ROCK: DIFFUSION AND I i0 May 1981, P3749-3758
The migration of radlonuclides in the fissures in the bedrock surrounding a repositary is discussed. A one-dimensional transport model is Iresented. It includes diffusion of the nuclides into the microfissures of the rock, and linear sorption, amd lomgitudinal dispersion in the bedrock. DimensiorLless breakthrough curves are given fc~ the aPl~Oxlmate rarge of variation of the input parameters. Calculations are made for a repository of spent fuel surrounded by fissured but fairly good rock. Longitudinal dispersion may significantly affect the amount of radioactive material reaching the biosphere. Dispersion effects of the magnitude considered in this study can significantly diminish the retardation effects of matrix diffusion. 825074 P~%MEABILITY OF GRANITE IN A TEMPERATURE GRADIENT Morrow, C; Lockner, D; Moore, D J Geol~lYS Res, V86, N ~ , I0 April 1981, P3002-3008 Changes in permeability of granite were measured as water flowed through samples in a temperature gradient. The experimental conditions simulated those around the 'very deep hole concept' nuclear