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Pyrite oxidation in saturated and Unsaturated Porous Media Flow: AComparison of alternative mathematical modeling approaches

Description: Pyrite (FeS{sub 2}) is one of the most common naturally occurring minerals that is present in many subsurface environments. It plays an important role in the genesis of enriched ore deposits through weathering reactions, is the most abundant sulfide mineral in many mine tailings, and is the primary source of acid drainage from mines and waste rock piles. The pyrite oxidation reaction serves as a prototype for oxidative weathering processes with broad significance for geoscientific, engineering,… more
Date: February 15, 1998
Creator: Xu, Tianfu; White, Stephen P. & Pruess, Karsten
open access

Numerical experiments on the probability of seepage intounderground openings in heterogeneous fractured rock

Description: An important issue for the performance of underground nuclear waste repositories is the rate of seepage into the waste emplacement drifts. A prediction of this rate is particularly complicated for the potential repository site at Yucca Mountain, Nevada, because it is located in thick, unsaturated, fractured tuff formations. Underground opening in unsaturated media might act as capillary barriers, diverting water around them. In the present work, they study the potential rate of seepage into dri… more
Date: April 15, 1998
Creator: Birkholzer, J.; Li, G.; Tsang, C. F. & Tsang, Y.
open access

Taxpayer Protections in the IRS Restructuring Bill: Attorneys' Fees and Damages for IRS Abuses

Description: This report discusses the proposals to expand a court's authority to award attorneys' fees and costs in certain cases and the proposal to permit a taxpayer to collect damages for negligent collection actions by IRS agents. These provisions are covered in sections 311 and 312 of the House version and in sections 3101 and 3102 of the Senate version.
Date: June 15, 1998
Creator: Morris, Marie B.
open access

Diabetes: Basic Information and Federal Funding

Description: This report describes diabetes, current treatment and management, public health impact and cost, innovations in treatment, and federal spending on treatment and research.
Date: July 15, 1998
Creator: Vogt, Donna U.
open access

Hanford Tanks Initiative cone penetrometer siting plan and progress report

Description: The HTI subsurface characterization task will use the Hanford Cone Penetrometer platform (CPP) to deploy soil sensor and sampling probes into the vadose zone/soils around AX-104 during FY-99. This Siting Plan describes activities and actions undertaken in support of CPP deployment: deployment goals, maps of the deployment sites/locations, pre-activity (siting-related) documentation tasks, a summary of activities that have been completed to date, and an estimated schedule of additional planned a… more
Date: October 15, 1998
Creator: IWATATE, D.F.
open access

Hanford tank initiative cone penetrometer stand alone grouting module

Description: The HTI subsurface characterization task will use the Hanford Cone Penetrometer platform (CPP) to deploy contaminant sensor and soil sampling probes into the vadose zone surrounding SST 241-AX-104. Closure of the resulting penetration holes may be stipulated by WAC requirements. A stand alone grouting capability deployable by the CPP has been developed. This qualification test plan defines testing of this capability to be performed at the Immobilized Low Activity Waste Disposal Complex.
Date: October 15, 1998
Creator: CALLAWAY, W.S.
open access

In-Situ Tritium Beta Detector

Description: The objectives of this three-phase project were to design, develop, and demonstrate a monitoring system capable of detecting and quantifying tritium in situ in ground and surface waters, and in water from effluent lines prior to discharge into public waterways. The tritium detection system design is based on measurement of the low energy beta radiation from the radioactive decay of tritium using a special form of scintillating optical fiber directly in contact with the water to be measured. The… more
Date: April 15, 1998
Creator: Berthold, J. W. & Jeffers, L. A.
open access

Decontamination of Radionuclides from Concrete During and After Thermal Treatment

Description: The objective was to clarify from the theoretical viewpoint the mechanical, diffusional, thermodynamic and electromagnetic aspects of the decontaminations problem, by means of developing a powerful computational model to evaluate the effect of a very rapid heating regime on the on the contaminated concrete walls or slabs. The practical objective was to assess the feasibility of the microwave heating scheme envisaged and determine its suitable parameters such as power and duration. This objectiv… more
Date: September 15, 1998
Creator: Bazant, Z. P.
open access

Final Report: Computer Games to Teach Geography: El Nino: Mysteries of the Pacific and Mysteries of the Antarctic, August 15, 1994 - June 20, 1998

Description: During the period covered by this project we have accomplished all the objectives described in our original proposal. The main achievement, however, has been to bring to the commercial market an excellent quality education software product. This highest level of quality has been recognized by the Software Publisher Association, which has awarded its most prestigious appreciation, the Codie Award, for our first product Ocean Expeditions: El Nino. With regards to commercialization, we have develo… more
Date: September 15, 1998
Creator: Gautier-Downes, Catherine
open access

Fly ash-enhanced aluminum composites for automotive parts. [Reports for October to December, 1997, and January to March, 1998]

Description: The objectives of this report are to produce and evaluate the use of aluminum ''ashalloys''--metal matrix composites that incorporate coal fly ash--in the commercial manufacture of cast automotive parts. Some highlights of this report are: Results of the team coordination meeting in October included--(1) Determination of casting techniques from the candidates of squeeze, high pressure, low pressure, sand casting, and gravity pour; (2) Selection of the low stress/high stress automotive parts fro… more
Date: April 15, 1998
Creator: Golden, Dean & Rohatgi, Pradeep
open access

Measurements of Surface Ocean Carbon Dioxide Partial Pressure During WOCE

Description: All of the technical goals of the World Ocean Circulation Experiment (WOCE) field program which were supported under the Department of Energy research grant ''Measurements of Surface Ocean Carbon Dioxide Partial Pressure During WOCE'' (DE-FG03-90ER60981) have been met. This has included the measurement of the partial pressures of carbon dioxide (C0{sub 2}) and nitrous oxide (N{sub 2}O) in both the surface ocean and the atmosphere on 24 separate shipboard expedition legs of the WOCE Hydrographic… more
Date: October 15, 1998
Creator: Weiss, R.F.
open access

Naturally fractured tight gas reservoir detection optimization

Description: The three tasks were completed during this reporting period. During this quarter, work focused on a local structural analysis of the Table Rock field, greater Green River basin (GGRB) in southwestern Wyoming. The ultimate objective of the local analysis is to apply the techniques developed and demonstrated during earlier phases of the project in the Rulison Field area of the Piceance basin for sweet-spot delineation. The primary goal of this work is to focus in on the Table Rock field area in t… more
Date: November 15, 1998
open access

Fly ash-enhanced aluminum composites for automotive parts. [Reports for April to June, 1998, and July to September, 1998]

Description: The objectives of this report are to produce and evaluate the use of aluminum ''ashalloys''--metal matrix composites that incorporate coal fly ash--in the commercial manufacture of cast automotive parts. Some highlights are: (1) Ashalloy ingot with ''C'' type fly ash was synthesized using stir casting techniques similar to the successful castings of ''F'' type fly ash. Agglomeration was noted. Stirring periods were increased up to 45 minutes compared to the normal 5 minutes to determine whether… more
Date: October 15, 1998
Creator: Golden, Dean & Rohatgi, Pradeep
open access

1998 Complex Systems Summer School

Description: For the past eleven years a group of institutes, centers, and universities throughout the country have sponsored a summer school in Santa Fe, New Mexico as part of an interdisciplinary effort to promote the understanding of complex systems. The goal of these summer schools is to provide graduate students, postdoctoral fellows and active research scientists with an introduction to the study of complex behavior in mathematical, physical, and living systems. The Center for Nonlinear Studies suppor… more
Date: December 15, 1998
open access

Structure of parallel-velocity-shear driven mode in toroidal plasmas

Description: It is shown that the Fourier-ballooning representation is appropriate for the study of short wavelength drift-like perturbation in toroidal plasmas with a parallel velocity shear (PVS). The radial structure of the mode driven by a PVS is investigated in a torus. The Reynolds stress created by PVS turbulence and proposed as one of the sources for a sheared poloidal plasma rotation is analyzed. It is demonstrated that a finite ion temperature may strongly enhance the Reynolds stress creation abil… more
Date: September 15, 1998
Creator: Dong, J.Q.; Xu, W.B.; Zhang, Y.Z. & Horton, W.
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