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Book Creep in Topopah Spring Member Welded Tuff

Download or read book Creep in Topopah Spring Member Welded Tuff written by R. J. Martin and published by . This book was released on 1995 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Radioactive Waste Management

Download or read book Radioactive Waste Management written by and published by . This book was released on 1981 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Further Description of the Petrology of the Topopah Spring Member of the Paintbrush Tuff in Drill Holes UE25A 1 and USW G1 and of the Lithic Rich Tuff in USW G1 Yucca Mountain Nevada

Download or read book Further Description of the Petrology of the Topopah Spring Member of the Paintbrush Tuff in Drill Holes UE25A 1 and USW G1 and of the Lithic Rich Tuff in USW G1 Yucca Mountain Nevada written by P. I. Carroll and published by . This book was released on 1981 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Further Description of the Petrology of the Topopah Spring Member of the Paintbrush Tuff in Drill Holes UE25A 1 and USW G1 and of the Lithic rich Tuff in USW G1 Yucca Mountain Nevada

Download or read book Further Description of the Petrology of the Topopah Spring Member of the Paintbrush Tuff in Drill Holes UE25A 1 and USW G1 and of the Lithic rich Tuff in USW G1 Yucca Mountain Nevada written by and published by . This book was released on 1981 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Topopah Spring Member of the Paintbrush Tuff and the Lithic-rich tuff and two Tertiary volcanic units that occur in cores from drill holes UE25a-1 and USW-G1 at Yucca Mountain, Nevada. Recently they have been suggested as possibly suitable for the permanent storage of high-level radioactive waste. Earlier petrologic characterization of these units is augmented here. The Topopah Spring Member (approximately 350 m thick) has two compound cooling units. The upper, thinner unit is densely welded to vitrophyric. The lower unit ranges from nonwelded to vitrophyric, and its nonwelded base is extensively zeolitized to clinoptilolite and mordenite. Heulandite occurs as fracture fill in the overlying vitrophyric part, but zeolites are absent above that vitrophyre. Here primary devitrification plus vapor-phase crystallization dominate the mineralogy. Vapor-phase effects are especially prominent between the two vitrophyres in both cores and include numerous large lithophysal cavities throughout most of this moderately to densely welded tuff. The Lithic-rich tuff extends from 1203 to 1506 m in the USW-G1 drill core. It is nonwelded to partly welded but is well indurated due to pervasive intergrowths of authigenic minerals. These phases are analcime, albite, alkali feldspar, sericite, chlorite and quartz. The transition from analcime to secondary albite corresponds to Iijima's zeolite Zone IV boundary, and this boundary appears in USW-G1 at 1326 m. However, analcime remains as a prominent phase through most of the Lithic-rich tuff. Further work is necessary to assess the suitability of either of these horizons for a waste repository. In the Topopah Spring Member, both mechanical and hydrologic properties of thick lithophysal zone must be studied, as well as the complete sequence of fracture fill. For both units, zeolite and clay mineral stabilities need to be investigated.

Book Petrologic and Mechanical Properties of Outcrop Samples of the Welded Devitrified Topopah Spring Member of the Paintbrush Tuff

Download or read book Petrologic and Mechanical Properties of Outcrop Samples of the Welded Devitrified Topopah Spring Member of the Paintbrush Tuff written by R. H. Price and published by . This book was released on 1987 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Hydrological Properties of Topopah Spring Tuff Under a Thermal Gradient Laboratory Results

Download or read book Hydrological Properties of Topopah Spring Tuff Under a Thermal Gradient Laboratory Results written by W. Lin and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrological properties of a naturally fractured Topopah Spring welded tuff sample from Yucca Mountain at the Nevada Test Site, Nevada have been studied. Confining pressure, sample temperature, and pore pressure were held at values that simulated the in situ near-field conditions expected shortly after emplacement of a high level waste container. Water permeability of the sample was determined as functions of temperature and time. Electrical resistivity and electrical impedance tomographs were used to infer the distribution of moisture in the sample during dehydration and rehydration processes.

Book Laboratory Determined Suction Potential of Topopah Spring Tuff at High Temperatures

Download or read book Laboratory Determined Suction Potential of Topopah Spring Tuff at High Temperatures written by William Daily and published by . This book was released on 1991 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this work is to experimentally determine the capillary suction potential of Topopah Spring tuff from Yucca Mountain, Nye County, Nevada. This data can be used to help characterize the unsaturated hydraulic properties of the densely welded tuff at this site.

Book Moisture Retention Curves of Topopah Spring Tuff at Elevated Temperatures

Download or read book Moisture Retention Curves of Topopah Spring Tuff at Elevated Temperatures written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Knowledge of unsaturated flow and transport in porous media is critical for understanding the movement of water and solute through the unsaturated zone. The suction potential of rock determines the imbibition of water and, therefore, the moisture retention in the matrix. That, in turn, affects the relative importance of matrix flow and fracture flow, and their interaction, because greater suction potential moves more water from fractures into the matrix and therefore retards fracture flow. The moisture content as a function of the suction potential is called a moisture retention curve or a characteristic curve. Moisture-retention data are important input for numerical models of water movement in unsaturated porous media. Also important are the effect of sample history on the moisture-retention curves and whether there is significant hysteresis between wetting and drying measurements. The Yucca Mountain Site Characterization Project (YMP) of the U.S. Department of Energy is studying the suitability of the tuffaceous rock at Yucca Mountain, Nevada, for a potential high-level nuclear waste repository. The potential repository horizon will be in the unsaturated zone of the Topopah Spring member (densely welded) of the Paintbrush Tuff unit at Yucca Mountain. This unit is highly fractured. Therefore, transport of water within the near field of the nuclear waste package in the repository is strongly influenced by the suction potential of the repository host rocks at elevated temperatures. In a high-level nuclear waste repository, the rock mass around the waste packages will become dry because of the thermal load of the waste but will then re-wet during the cool-down period as the thermal output of the waste packages declines. Much of this process will occur at temperatures above ambient temperature. The goal of our work is to determine the importance of temperature and the wetting-drying hysteresis on the measured moisture retention curves of the densely welded tuff. For Topopah Spring tuff the suction potential is assumed to be primary due to the matric potential.

Book Laboratory Determined Suction Potential of Topopah Spring Tuff at High Temperatures

Download or read book Laboratory Determined Suction Potential of Topopah Spring Tuff at High Temperatures written by and published by . This book was released on 1991 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this work is to experimentally determine the capillary suction potential of Topopah Spring tuff from Yucca Mountain, Nye County, Nevada. This data can be used to help characterize the unsaturated hydraulic properties of the densely welded tuff at this site. 7 refs., 4 figs., 1 tab.

Book Anisotropy of the Topopah Spring Member Tuff

Download or read book Anisotropy of the Topopah Spring Member Tuff written by R. J. Martin and published by . This book was released on 1992 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Microstructural Analyses of Topopah Spring Tuff from the Large Block Test at Fran Ridge Nevada

Download or read book Microstructural Analyses of Topopah Spring Tuff from the Large Block Test at Fran Ridge Nevada written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Microstructural information (e.g., porosity, pore size distribution, and surface area) of porous media is critical to understanding water transport mechanisms and physical properties and their bearing on geophysical measurements. We report microstructural data obtained by mercury injection porosimetry (MIP) on 33 samples of densely welded Topopah Spring tuff from Fran Ridge, Yucca Mountain, Nevada Test Site (NTS), Nevada. The characterization of these samples is also important for the interpretation and analysis of the Large Block Test (LBT) performed in support of the Yucca Mountain Project (YMP). This report includes previously published data on samples from the same location (Roberts and Lin, 1996). We also present information from the Yucca Mountain Site Characterization Project/Lawrence Livermore National Laboratory (YMSCP/LLNL) Large Block Test Engineering Plan (Wilder, 1995) to allow correlation of our data directly to various planes within the Large Block.