Changes in permeability and fluid chemistry of the Topopah Spring Member of the Paintbrush tuff (Nevada Test Site) when held in a temperature gradient: summary of results

Technical Report · Fri Jun 01 04:00:00 EDT 1984

DOI:https://doi.org/10.2172/59323· OSTI ID:59323

Moore, D E; Morrow, C A; Byerlee, J D

The permeability and groundwater chemistry results for the Topopah Spring Member are reported and compared with the results from the previous work on Bullfrog. Permeability measurements made on samples of the Topopah Spring Member of the Paintbrush Tuff at room-temperature and in a temperature gradient show that the initially high (3-65 {mu}da) permeabilities are little affected by heating to at least 150{sup 0}C. These permeability relationships are favvorable for the disposal of nuclear waste in this stuff in an unsaturated zone at the Nevada Test Site. The fluids discharged from the samples of tuff during the experiments are dilute, nearly neutral solutions that differ only slightly from the starting groundwater composition. 8 references, 10 figures, 5 tables.

• Research Organization: Geological Survey, Menlo Park, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 59323
• Report Number(s): UCRL--15620; SANL--324-001; ON: DE85001000
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
58 GEOSCIENCES
ACID CARBONATES
CHEMICAL COMPOSITION
CHEMISTRY
EXPERIMENTAL DATA
FLUORIDES
GROUND WATER
HIGH-LEVEL RADIOACTIVE WASTES
MAGNESIUM
NEVADA TEST SITE
PERMEABILITY
POTASSIUM
SILICON OXIDES
SULFATES
TEMPERATURE GRADIENTS
TIME DEPENDENCE
TUFF
YUCCA MOUNTAIN
Yucca Mountain Project