Hydraulic and diffusive properties of clay-based backfill material for a low- and intermediate-level waste repository
- Korea Atomic Energy Research Inst., Taejon (Korea, Republic of). Nuclear Environment Management Center
The results of experimental studies performed to determine the radionuclide diffusion coefficients in a compacted clay and the hydraulic conductivities of clay/crushed granite mixtures with various clay contents are presented. Clay used in the experiments is a natural clay from the southeastern part of Korea, and it contains mainly calcium bentonite. The hydraulic conductivities of clay/crushed granite mixtures decreased with increasing clay content. In case of clay content of 50 wt.%, they maintain the considerably lower values even at the dry density of 1.5 Mg/m{sup 3}. The diffusion coefficients for {sup 90}Sr, {sup 137}Cs, {sup 60}Co and {sup 125}I in water saturated clay at a dry density of 1.4 Mg/m{sup 3} were measured at room temperature. The average apparent diffusion coefficients obtained are 4.5 {times} 10{sup {minus}12} m{sup 2}/s, 9.0 {times} 10{sup {minus}13} m{sup 2}/s, 3.4 {times} 10{sup {minus}13} m{sup 2}/s, and 6.7 {times} 10{sup {minus}11} m{sup 2}/s for {sup 90}Sr, {sup 137}Cs, {sup 60}Co, and {sup 125}I, respectively.
- OSTI ID:
- 377930
- Report Number(s):
- CONF-941075-; ISBN 1-55899-253-7; TRN: 96:025053
- Resource Relation:
- Conference: 18. international symposium on the scientific basis for nuclear waste management, Kyoto (Japan), 23-27 Oct 1994; Other Information: PBD: 1995; Related Information: Is Part Of Scientific basis for nuclear waste management 18. Part 1; Murakami, Takashi [ed.] [Ehime Univ., Matsuyama, Ehime (Japan). Dept. of Earth Sciences]; Ewing, R.C. [ed.] [Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Earth and Planetary Sciences]; PB: 787 p.; Materials Research Society symposium proceedings, Volume 353
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
RADIOACTIVE WASTE FACILITIES
BACKFILLING
BENTONITE
RADIONUCLIDE MIGRATION
HYDRAULIC CONDUCTIVITY
GRANITES
LOW-LEVEL RADIOACTIVE WASTES
INTERMEDIATE-LEVEL RADIOACTIVE WASTES
RADIOACTIVE WASTE DISPOSAL
UNDERGROUND DISPOSAL
BULK DENSITY
STRONTIUM 90
CESIUM 137
COBALT 60
IODINE 125
DIFFUSION
EXPERIMENTAL DATA