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Back analysis of heat loads on selected thermal storages
89A apparent radiocarbon age in carbonate aquifers. This shows a considerable delay in C-14 movement with respect to that in fissure water. The retardation is complex and affected by many parameters and a simple C-14 age correction factor cannot be developed from this work, but the cause of discrepancy is illustrated.
922127 Contribution to the study of thermo-hydro-mechanical coupling in clays (In French) Djeran, I; Rousset, G
Proc 7tb I S R M International Congress on Rock Mechanics, Aachen, 16-20 September 1991 VI, P83-86. Publ Rotterdam: A A Balkema, 1991 Clays and argillaceous materials are candidate materials for containment of radioactive waste, because of low permeability and high nuclide retardant potential. The behaviour of a kaolinite clay under simulated in situ conditions has been examined in the laboratory. Temperature distribution, thermal conductivity as a function of temperature, and moisture diffusion have been examined. A thermodilatant porous elastic material model is used in an analysis to describe the observed behaviour.
922130 Back analysis of heat loads on selected thermal storages Goodall, D C; Uth¢i~, T; Thorbergsen. E Proc International Coa.ference on Storage of Gases in Rock
Caverns, 7rondheim. 26-28 Jane 1989 P229-236. Publ Rotterdam: A A Balkema. 1969 The heat load on a low temperature storage depends directly on the thermal conductivity of the surrounding rock mass, provided thermal cracking does not occur. Thermal conductivity calculated from observed heat loads can be used to check that thermal cracking has not occurred and to validate laboratory measurements on fractured, anisotropic, inhomogeneous rock samples. Such results are presented for a liquid ammonia storage (-33 deg C) at depth 37m in quartz-rich greenstone.
Permeability and capillarity See also: 922038, 922039, 922042, 922048, 922256, 922451, 922455. 922131 Modelling of two-dimensional contaminant migration in a layered and fractured zone beneath landfills Rowe, R K; Booker, J R
Can Geotedi J V28. N3, June 1991, P338-352
922128 Thermomechanical near feld modelling of a radioactive waste repository in salt formations (In French) Ghoreychi, M; Abou-Ezzi, N; Schmitt, N
Proc 7th I S R M International Congress on Rock Mechanics, Aachen, 16-20 September 1991 V1, P91-94. Publ Rotterdam: A A Balkema, 1991 Temperatures and stresses around a radioactive waste canister in a rock salt formation are analysed. The presence of an annular ring backfilled with crushed salt between the canister and rock mass will introduce nonlinear phenomena due to radiation and conduction in the gap and change in thermal properties of the backfill as it compacts as a result of borehole closure. The thermal and mechanical response around the borehole and its temporal variation are analysed using the finite element codes T H E R M and GEOMEC respectively. Three cases are examined, backfilled gap, empty gap, and immediate contact between canister and rockmass.
922129 Storage of refrigerated liquified gases in rock caverns characteristics of rock under very low temperature Aoki, K; Hibiya, K; Yoshida, T
Proc International Conference on Storage of Gases in Rock Caverns, Trondheim, 26-28 June 1989 P221-227. Publ Rotterdam: A A Balkema, 1989 The effect of low temperatures down to -160 deg C on mechanical properties and results of thermal shock tests and freeze thaw cycling at -40/+ 15 deg C for up to 300 cycles are described for schist, rhyolite, conglomerate, granite, and mudstone rocks. Temperature dependence of thermal properties and volume shrinkage or expansion were also examined. Engineering problems of cryogenic storage, such as freezing temperature of seepage flow into the cavern and durability of bolts and grout, are also discussed.
A finite layer formulation which considers horizontal and vertical transport in systems which may consist of both fractured and unfractured layers is presented. Aqueous phase contaminants typical of municipal or nonhazardous waste fill are considered for a variety of hypothetical cases. Pollutant impact on an underlying aquifer may be significantly affected by even widely spaced small fractures in relatively impermeable clays or tills. Significant impact may be delayed until the leachate is at low strength, but will then be long lasting. Regulatory aspects are discussed. 922132 Numerical simulations to investigate moisture-retention characteristics in the design of oxygen-limiting covers for reactive mine railings. Note Akindunni, F F; Gillham, R W; Nicholson, R V
Can Geotech J 1/28. N3, June 1991, t'446-451 High water content barriers of fine grained materials are used to minimise oxygen access to mine spoils. Drainage through a two layer profile is simulated using a one dimensional, finite element saturated-unsaturated flow model, and the effect of moisture retention properties of the upper layer on oxygen ingress to the lower is examined. The effectiveness of the bartier material depends on its air entry value. The thickness of the cover maintained in fully saturated state after drainage depends on the pressure head at which the mine tailings approach residual saturation. 922133 Estimation of storativity from recovery data Ballukraya, P N; Sharma, K K Ground Water 1/29, N4, July-Aug 1991, P495-498 A method, based on an equation derived from that of Cooper and Jacobs (1946), is presented for estimation of aquifer storativity using residual drawdown data from an obervation well. It is simple and easy to apply and suitable for cases where drawdown data are unavailable or of doubtful accuracy. The limited conditions where it can be used, where the Theis nonequilibrium equation applies, are pointed out.
© 1992 Pergamon Press Ltd. Reproduction not permitted
922127 Contribution to the study of thermo-hydro-mechanical coupling in clays (In French) Djeran, I; Rousset, G
Proc 7tb I S R M International Congress on Rock Mechanics, Aachen, 16-20 September 1991 VI, P83-86. Publ Rotterdam: A A Balkema, 1991 Clays and argillaceous materials are candidate materials for containment of radioactive waste, because of low permeability and high nuclide retardant potential. The behaviour of a kaolinite clay under simulated in situ conditions has been examined in the laboratory. Temperature distribution, thermal conductivity as a function of temperature, and moisture diffusion have been examined. A thermodilatant porous elastic material model is used in an analysis to describe the observed behaviour.
922130 Back analysis of heat loads on selected thermal storages Goodall, D C; Uth¢i~, T; Thorbergsen. E Proc International Coa.ference on Storage of Gases in Rock
Caverns, 7rondheim. 26-28 Jane 1989 P229-236. Publ Rotterdam: A A Balkema. 1969 The heat load on a low temperature storage depends directly on the thermal conductivity of the surrounding rock mass, provided thermal cracking does not occur. Thermal conductivity calculated from observed heat loads can be used to check that thermal cracking has not occurred and to validate laboratory measurements on fractured, anisotropic, inhomogeneous rock samples. Such results are presented for a liquid ammonia storage (-33 deg C) at depth 37m in quartz-rich greenstone.
Permeability and capillarity See also: 922038, 922039, 922042, 922048, 922256, 922451, 922455. 922131 Modelling of two-dimensional contaminant migration in a layered and fractured zone beneath landfills Rowe, R K; Booker, J R
Can Geotedi J V28. N3, June 1991, P338-352
922128 Thermomechanical near feld modelling of a radioactive waste repository in salt formations (In French) Ghoreychi, M; Abou-Ezzi, N; Schmitt, N
Proc 7th I S R M International Congress on Rock Mechanics, Aachen, 16-20 September 1991 V1, P91-94. Publ Rotterdam: A A Balkema, 1991 Temperatures and stresses around a radioactive waste canister in a rock salt formation are analysed. The presence of an annular ring backfilled with crushed salt between the canister and rock mass will introduce nonlinear phenomena due to radiation and conduction in the gap and change in thermal properties of the backfill as it compacts as a result of borehole closure. The thermal and mechanical response around the borehole and its temporal variation are analysed using the finite element codes T H E R M and GEOMEC respectively. Three cases are examined, backfilled gap, empty gap, and immediate contact between canister and rockmass.
922129 Storage of refrigerated liquified gases in rock caverns characteristics of rock under very low temperature Aoki, K; Hibiya, K; Yoshida, T
Proc International Conference on Storage of Gases in Rock Caverns, Trondheim, 26-28 June 1989 P221-227. Publ Rotterdam: A A Balkema, 1989 The effect of low temperatures down to -160 deg C on mechanical properties and results of thermal shock tests and freeze thaw cycling at -40/+ 15 deg C for up to 300 cycles are described for schist, rhyolite, conglomerate, granite, and mudstone rocks. Temperature dependence of thermal properties and volume shrinkage or expansion were also examined. Engineering problems of cryogenic storage, such as freezing temperature of seepage flow into the cavern and durability of bolts and grout, are also discussed.
A finite layer formulation which considers horizontal and vertical transport in systems which may consist of both fractured and unfractured layers is presented. Aqueous phase contaminants typical of municipal or nonhazardous waste fill are considered for a variety of hypothetical cases. Pollutant impact on an underlying aquifer may be significantly affected by even widely spaced small fractures in relatively impermeable clays or tills. Significant impact may be delayed until the leachate is at low strength, but will then be long lasting. Regulatory aspects are discussed. 922132 Numerical simulations to investigate moisture-retention characteristics in the design of oxygen-limiting covers for reactive mine railings. Note Akindunni, F F; Gillham, R W; Nicholson, R V
Can Geotech J 1/28. N3, June 1991, t'446-451 High water content barriers of fine grained materials are used to minimise oxygen access to mine spoils. Drainage through a two layer profile is simulated using a one dimensional, finite element saturated-unsaturated flow model, and the effect of moisture retention properties of the upper layer on oxygen ingress to the lower is examined. The effectiveness of the bartier material depends on its air entry value. The thickness of the cover maintained in fully saturated state after drainage depends on the pressure head at which the mine tailings approach residual saturation. 922133 Estimation of storativity from recovery data Ballukraya, P N; Sharma, K K Ground Water 1/29, N4, July-Aug 1991, P495-498 A method, based on an equation derived from that of Cooper and Jacobs (1946), is presented for estimation of aquifer storativity using residual drawdown data from an obervation well. It is simple and easy to apply and suitable for cases where drawdown data are unavailable or of doubtful accuracy. The limited conditions where it can be used, where the Theis nonequilibrium equation applies, are pointed out.
© 1992 Pergamon Press Ltd. Reproduction not permitted