Preliminary test on gas migration through bentonite-sand mixture

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:377932

Hokari, T; Ishii, T; Nagawsawa, T N ^[1]; Tomita, R; Nakajima, M ^[2]

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1. Shimizu Corp., Tokyo (Japan)
2. KOA Development Co., Chiba (Japan)

The Low-Level Radioactive Disposal facility has planned to cover the vaults with impermeable bentonite-sand mixture in order to minimize groundwater flux through the facility. In case metal wastes are to be disposed of in the burial facility in the future, it is essential to confirm that bentonite mixture should have gas permeability enough for the gas volume which would be expected to be generated due to anaerobic corrosion of metals. This report performed a preliminary test with a bentonite-sand mixture whose aggregate was a Japanese Standard sand. Results are the following: (1) gas breakthrough pressure of the mixture was less than the overburden pressure, the gas permeability was estimated to be of order of 10{sup {minus}2} md; (2) the mixture did not deteriorate in hydraulic conductivity after gas breakthrough.

• OSTI ID: 377932
• Report Number(s): CONF-941075--; ISBN 1-55899-253-7
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
36 MATERIALS SCIENCE
BENTONITE
BIOLOGICAL FOULING
DEGASSING
EXPERIMENTAL DATA
GROUND WATER
HYDRAULIC CONDUCTIVITY
HYDROGEN PRODUCTION
LOW-LEVEL RADIOACTIVE WASTES
METALS
MITIGATION
ORGANIC COMPOUNDS
PERMEABILITY
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE FACILITIES
RADIOLYSIS
RESERVOIR PRESSURE
SAND
UNDERGROUND DISPOSAL
WATER INFLUX