10 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Geochemistry"  
Results: 1 - 10
open access

Existing Evidence for the Fate of Neptunium in the Yucca Mountain Repository

Description: Neptunium, because of its long half life, is an element of long-term interest to the Yucca Mountain repository. The fate of neptunium under repository settings is unknown. This report provides a review and new interpretation of past tests on commercial spent nuclear fuel and experimental evidence on the fate of neptunium. Tests on commercial spent nuclear fuel preformed previously at Pacific Northwest National Laboratory (PNNL) used a bathtub setup by immersing spent fuel in either deionized wa… more
Date: June 18, 2003
Creator: Friese, Judah I. (BATTELLE (PACIFIC NW LAB)); Buck, Edgar C. (BATTELLE (PACIFIC NW LAB)); McNamara, Bruce K. (BATTELLE (PACIFIC NW LAB)); Hanson, Brady D. (BATTELLE (PACIFIC NW LAB)) & Marschman, Steven C. (BATTELLE (PACIFIC NW LAB))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Computational Studies in Molecular Geochemistry and Biogeochemistry

Description: The ability to predict the transport and transformations of contaminants within the subsurface is critical for decisions on virtually every waste disposal option facing the Department of Energy (DOE), from remediation technologies such as in situ bioremediation to evaluations of the safety of nuclear waste repositories. With this fact in mind, the DOE has recently sponsored a series of workshops on the development of a Strategic Simulation Plan on applications of high perform-ance computing to … more
Date: April 18, 2006
Creator: Felmy, Andrew R.; Bylaska, Eric J.; Dixon, David A.; Dupuis, Michel; Halley, James W.; Kawai, R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design of an intermediate-scale experiment to validate unsaturated- zone transport models

Description: An intermediate-scale experiment is being carried out to evaluate instrumentation and models that might be used for transport-model validation for the Yucca Mountain Site Characterization Project. The experimental test bed is a 6-m high {times} 3-m diameter caisson filled with quartz sand with a sorbing layer at an intermediate depth. The experiment involves the detection and prediction of the migration of fluid and tracers through an unsaturated porous medium. Pre-test design requires estimati… more
Date: December 18, 1991
Creator: Siegel, M. D.; Hopkins, P. L.; Glass, R. J. & Ward, D. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A study of the relationship of geological formation to the NORM. Quarterly technical progress report, April 1--June 30, 1995

Description: Naturally Occurring Radioactive Materials (NORM) is a common and costly contaminant of produced waters associated with natural gas production and exploration. One way of combating this problem is by identifying the problem beforehand. The approach to this problem involves development of NORM prediction capabilities based on the geological environment. During the third quarter of this project, emphasis was placed on three tasks; laboratory procedural development, continuance of preliminary geolo… more
Date: July 18, 1995
Creator: Bursh, T.P. & Chriss, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Speciation and Fate of Trace Metals in Estuarine Sediments Under Reduced and Oxidized Conditions, Seaplane Lagoon, Alameda Naval Air Station

Description: We have identified important chemical reactions that control the fate of metal-contaminated estuarine sediments if they are left undisturbed (in situ) or if they are dredged. We combined information on the molecular bonding of metals in solids from X-ray absorption spectroscopy (XAS) with thermodynamic and kinetic driving forces obtained from dissolved metal concentrations to deduce the dominant reactions under reduced and oxidized conditions. We evaluated the in situ geochemistry of metals (ca… more
Date: October 18, 2002
Creator: Carroll, S A; Day, P A; Esser, B & Randall, S
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of Potential Impacts of Microbial Activity on Drift Chemistry

Description: ''Evaluation of Potential Impacts of Microbial Activity on Drift Chemistry'' focuses on the potential for microbial communities that could be active in repository emplacement drifts to influence the in-drift bulk chemical environment. This report feeds analyses to support the inclusion or exclusion of features, events, and processes (FEPs) in the total system performance assessment (TSPA) for the license application (LA), but this work is not expected to generate direct feeds to the TSPA-LA. Th… more
Date: November 18, 2004
Creator: Wang, Y.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Geochemistry of Aluminum in High Temperature Brines

Description: The objective ofthis research is to provide quantitative data on the equilibrium and thermodynamic properties of aluminum minerals required to model changes in permeability and brine chemistry associated with fluid/rock interactions in the recharge, reservoir, and discharge zones of active geothermal systems. This requires a precise knowledge of the thermodynamics and speciation of aluminum in aqueous brines, spanning the temperature and fluid composition rangesencountered in active systems. Th… more
Date: May 18, 1999
Creator: Benezeth, P.; Palmer, D. A. & Wesolowski, D. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A study of the relationship of geological formation to the norm. Quarterly technical progress report, July 1, 1995--September 30, 1995

Description: Naturally Occurring Radioactive Materials (NORM) is a common and costly contaminant of produced waters associated with natural gas production and exploration. One way of combating this problem is by identifying the problem beforehand. Our approach to this problem involves development of NORM prediction capabilities based on the geological environment. During the fourth quarter of this project, emphasis was placed on three major tasks; identifying new sampling sites, continuance of preliminary g… more
Date: October 18, 1995
Creator: Bursh, T.P. & Chriss, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen