Unsaturated zone moisture and vapor movement induced by temperature variations in asphalt barrier field lysimeters

Conference · Wed Aug 01 04:00:00 EDT 1990

OSTI ID:6161181

Holford, D J; Fayer, M J

Protective barriers are being considered for use at the Hanford Site to enhance the isolation of radioactive wastes from water, plant, and animal intrusion. Lysimeters were constructed to evaluate the performance of asphalt barrier formulations under natural environmental conditions. These lysimeters were constructed of 1.7-m lengths of PVC pipe that have a diameter of 30 cm. The lysimeters were filled with layers of gravel, coarse sand, and asphalt. The sand and gravel placed under the asphalt barrier were wet when installed. TOUGH was used to conduct simulations to assess the effect of temperature variations on moisture and vapor movement beneath the asphalt layer in field test lysimeters. All variables in TOUGH were converted to double precision so that simulations could be run on a Sun-4 UNIX workstation. A radially symmetric grid was used to simulate the lysimeter. 8 refs., 9 figs.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• Sponsoring Organization: DOE/NE
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6161181
• Report Number(s): PNL-SA-18517; CONF-9009228--3-Vugraphs; ON: DE91004074
• Country of Publication: United States
• Language: English

Related Subjects

052002* -- Nuclear Fuels-- Waste Disposal & Storage
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ASPHALTS
ATMOSPHERIC PRECIPITATIONS
BITUMENS
COMPUTERIZED SIMULATION
HANFORD RESERVATION
LAYERS
LYSIMETERS
MANAGEMENT
MEASURING INSTRUMENTS
MOISTURE
NATIONAL ORGANIZATIONS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PERFORMANCE TESTING
RADIOACTIVE WASTE STORAGE
RAIN
SIMULATION
STORAGE
TAR
TEMPERATURE EFFECTS
TESTING
US DOE
US ERDA
US ORGANIZATIONS
WASTE MANAGEMENT
WASTE STORAGE