METHODS FOR PORE WATER EXTRACTION FROM UNSATURATED ZONE TUFF, YUCCA MOUNTAIN, NEVADA
Assessing the performance of the proposed high-level radioactive waste repository at Yucca Mountain, Nevada, requires an understanding of the chemistry of the water that moves through the host rock. The uniaxial compression method used to extract pore water from samples of tuffaceous borehole core was successful only for nonwelded tuff. An ultracentrifugation method was adopted to extract pore water from samples of the densely welded tuff of the proposed repository horizon. Tests were performed using both methods to determine the efficiency of pore water extraction and the potential effects on pore water chemistry. Test results indicate that uniaxial compression is most efficient for extracting pore water from nonwelded tuff, while ultracentrifugation is more successful in extracting pore water from densely welded tuff. Pore water splits taken from a single nonwelded tuff core during uniaxial compression tests have shown changes in pore water chemistry with increasing pressure for calcium, chloride, sulfate, and nitrate, while the chemistry of pore water splits from welded and nonwelded tuffs using ultracentrifugation indicates that there is no significant fractionation of solutes.
- Research Organization:
- Yucca Mountain Project, Las Vegas, Nevada
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 886556
- Report Number(s):
- NA; MOL.20060419.0221 DC#47459
- Country of Publication:
- United States
- Language:
- English
Similar Records
Triaxial- and uniaxial-compression testing methods developed for extraction of pore water from unsaturated tuff, Yucca Mountain, Nevada
Triaxial-compression extraction of pore water from unsaturated tuff, Yucca Mountain, Nevada
The one-dimensional compression method for extraction of pore water from unsaturated tuff and effects on pore-water chemistry
Conference
·
Sat Dec 30 23:00:00 EST 1989
·
OSTI ID:137938
Triaxial-compression extraction of pore water from unsaturated tuff, Yucca Mountain, Nevada
Technical Report
·
Fri Dec 30 23:00:00 EST 1988
·
OSTI ID:60655
The one-dimensional compression method for extraction of pore water from unsaturated tuff and effects on pore-water chemistry
Technical Report
·
Tue Dec 30 23:00:00 EST 1997
·
OSTI ID:653994