HR: 1340h
AN: H33D-1608    [Abstracts]
TI: Cross-Evaluation of Laboratory Permeability Tests by Dimensionless Analysis
AU: * Takeda, M
EM: mikio-takeda@aist.go.jp
AF: National Institute of Advanced Industrial Science and Technology (AIST), Central 7 Higashi 1-1-1, Tsukuba, 305-8567, Japan
AU: Zhang, M
EM: m.zhang@aist.go.jp
AF: National Institute of Advanced Industrial Science and Technology (AIST), Central 7 Higashi 1-1-1, Tsukuba, 305-8567, Japan
AU: Hiratsuka, T
EM: t-hiratsuka@aist.go.jp
AF: National Institute of Advanced Industrial Science and Technology (AIST), Central 7 Higashi 1-1-1, Tsukuba, 305-8567, Japan
AB: Accurate estimations of transport parameters of engineered and natural barrier materials are indispensable for assessments of the safety of geological disposal of hazardous wastes including radioactive nuclear waste. In such projects, it is essential that the barrier materials be capable of retarding the migration of contaminants. When groundwater flow is dominant, the evaluation of hydraulic parameters, particularly the permeability and specific storage, is of fundamental importance in the safety assessment. The permeability and specific storage of synthetic and geological materials are measured using permeability tests; however, conventional test methods are routinely applied to barrier materials with relatively low-permeabilities with little knowledge about their applicabilities. In order to provide a theoretical basis for designing laboratory permeability tests, the applicabilites of currently available test methods were examined and cross-evaluated with emphases on the experimental time and the parameter sensitivity using a numerical approach. To allow for a general discussion, a series of examinations were conducted based on a dimensionless analysis using dimensionless parameters representing the hydraulic properties and dimensions of the specimen and the other experimental conditions. In the dimensionless-time scale, the experimental time and the parameter sensitivity of the individual test methods can be simulated and compared by varying a few dimensionless parameters representing the experimental conditions. From a series of examinations, it was found that the experimental time and the parameter sensitivity of the individual test methods can be ascertained and compared using a few dimensionless parameters. This research project has been conducted under the research contract with the Japan Nuclear Energy Safety Organization (JNES).
DE: 1800 HYDROLOGY
DE: 1832 Groundwater transport
DE: 1859 Rocks: physical properties
DE: 1894 Instruments and techniques: modeling
SC: Hydrology [H]
MN: 2007 Fall Meeting