57A 911444
911448
Rock caverns in Scandinavia
In situ testing program at the Waste Isolation Pilot Plant Matalucci, R V Radionct Waste Manage VI4, Nil2, 1990, P123-154
Lindblom, U E Proc Seminar Rock Cavern - Hong Kong, Hong Kong, 8-9 December 1989 P7-19. Pubi London: IMM, 1989 Scandinavia has kept a leading role in the use of rock caverns since World War II, starting with underground oil storage in steel tanks and continuing with unlined rock caverns, and about 200 major projects have been completed. Today, much development effort is devoted to high-pressure gas storage in rock caverns. Other areas where rock caverns have been successfully employed include sewage and waste disposal, storage of goods, cold stores, archives and car parks. A summary of the historical background and the present use of rock caverns in Scandinavia, including Finland, is presented. 91 i 445 Towards convenient, benign space: caverns in an urban
environmental context Marsden, B S Proc Seminar Rock Cavern - Hong Kong, Hong Kong, 8-9 December 1989 P35-43. Publ London: IMM, 1989 Close encounters between disparate urban activities can be uncomfortable, unhealthy and even hazardous, especially in a very high density city. On the other hand, high density necessitates propinquity and propinquity confers convenience, a prime attribute of the urban way of life. Caverns may have a selective contribution to make in relieving this inherent tension between the objectives of environmental quality and convenience. An initial reconnaissance is attempted of this potential contribution, both generically and in the specific context of the metropolitan area of an advanced newly-emerging economy, Hong Kong. Auth
Radioactive waste disposal See also: 911089, 911142, 911145 911446 Discontinuous behaviour near excavations in a bedded salt formation Stormont, J C
lnt J Min Geoi Engng I/8, NI, March 1990, P35-56 At the Waste Isolation Pilot Plant, New Mexico, fractures, bed separation,and shear displacements are found in the vicinity of most excavations, in addition to creep deformation. Examples of this discontinuous behaviour are given. Observations are qualitatively consistent with the formation acting as a bedded system with limited tensile and compressive behaviour of the salt. The importance of the discontinuous behaviour to effective fluid transport paths and its consideration in repository design are discussed. 91 ! 447
Site-characterization studies at the Waste Isolation Pilot Plant (WlPP) site, southeastern New Mexico Lappin, A R Radionct Waste Manage VI4, Nl/2, 1990, P!01-121
The program provides full scale experiments to evaluate constitutive models and experimental data for the rock salt. Thermal/structural interaction, plugging and sealing, and waste package performance are the main areas of study. Actual room closure rates are around 3 times those predicted from laboratory data, although recent modifications to the elastic properties and constitutive law provide more closely matched results. Seal tests have evaluated salt based cements and salt bentonite blocks. Several types of waste container have been evaluated. 911449 Thermohydrologic conditions near high-level nuclear wastes emplaced in partially saturated fractured tuff. !. Simulation
studies with explicit considerations of fracture effects Prness, K, Wang, J S Y; Tsang, Y W Water Resour Res V26, N6, June 1990, P1235-1248 Coupled transport of heat, liquid water, vapour, and air in partially saturated, fractured porous rock has been simulated with formation parameters representative of the Yucca Mountain repository site. Flow geometry and physics are complicated by the presence of fractures. The TOUGH simulator, with space discretization by the integral finite difference method, is used. Conditions around the heat source are seen to depend strongly on fracture permeability and capillary pressure characteristics. Similarity is seen with published heater test results, but further quantitative evaluation is required. 911450
Tbermohydrologic conditions near high-level nuclear wastes emplaced in partially saturated fractured tuff. 2. Effective continuum approximation Pruess, K; Wang, J S Y; Tsang, Y W Water Resou Res V26, N6, June 1990. P!249-1261 An effective continuum approach to thermohydrologic behaviour of a rock mass on the scale of individual fractures and matrix blocks is presented. It is based on observed behaviour in a numerical simulation (ibid, V26, N6, PI235-1248). A critical concept in the approach is the notion of local thermodynamic equilibrium between rock matrix and fractures. Regions where it is applicable or where it breaks down are demonstrated, and a criterion for its application is derived. Quantitative evaluation shows the criterion to be consistent with the numerical results. 911451
Contaminant dissolution and diffnsional transport with a stationary precipitation front Light, W B; Chambre, P L; Pigford, T H; Lee, W W L Water Resoar Res V26, N7, July 1990, P1681-1685
Waste materials in a geologic repository will eventually dissolve, migrate away, and degrade or become part of the basic The WIPP is under construction in bedded halites of Permian rock material. Analysis for a single contaminant species, age in the Salado formation at depth about 665m. Work for travelling by diffusion, and precipitating at some distance the period 1983-1987 to update the conceptual model of geo- from the waste package due to reduced solubility, is presented. logic and hydrologic behaviour of the site is summarised. Data • Solutions are obtained for contaminant concentration in for the salt rock and the overlying strata were obtained from a ground water and mass transfer rates as a function of space large number of boreholes. Potential for migration of waste and time on both sides of the precipitation front. Results are products in response to natural or man-made changes is illustrated using numerical values of parameters relevant to assessed using several transport models. nuclear waste storage. © 1991 Pergamon Press pie. Reproduction not permitted