Access

Resource Type

Partner

Collection

Serial/Series Title

Degree Department

Country

States

Counties

Year

Month

Day

Language

571 Matching Results

Start Over Year 1999 Day 15th

Results open in a new window/tab.

Results: 1 - 24 of 571 next

(open access)

100-D Area In Situ Redox Treatability Test for Chromate-Contaminated Groundwater: FY 1998 Year-End Report

A treatability test was conducted for the In Situ Redox Manipulation (ISRM) technology at the US Department of Energy's Hanford, Washington 100D Area. The target contaminant was dissolved chromate [Cr(VI)] in groundwater. The ISRM technology involves creating a permeable subsurface treatment zone to reduce mobile chromate in groundwater to an insoluble form. The ISRM permeable treatment zone is created by reducing ferric iron [Fe(III)] to ferrous iron [Fe(II)] within the aquifer sediments. This is accomplished by injecting aqueous sodium dithionite into the aquifer and withdrawing the reaction products. The goal of the treatability test was to create a linear ISRM barrier by injecting sodium dithionite into five wells. Well installation and site characterization activities began in the spring of 1997. The first dithionite injection took place in September 1997. The results of this first injection were monitored through the spring of 1998; the remaining four dithionite injections were carried out in May through July of 1998. These five injections created a reduced zone in the Hanford unconfined aquifer 150 feet in length (perpendicular to groundwater flow) by 50 feet wide. The reduced zone extended over the thickness of the unconfined zone, which is approximately 15 feet. Analysis of recent groundwater …

Date: April 15, 1999

Creator: Williams, M. D.; Vermeul, V. R.; Szecsody, J. E.; Fruchter, J. S. & Cole, C. R.

Object Type: Report

System: The UNT Digital Library

(open access)

300 Area Treated Effluent Disposal Facility (TEDF) Hazards Assessment

This document establishes the technical basis in support of emergency planning activities for the 300 Area Treated Effluent Disposal Facility. The technical basis for project-specific Emergency Action Levels and Emergency Planning Zone is demonstrated.

Date: January 15, 1999

Creator: CAMPBELL, L.R.

Object Type: Report

System: The UNT Digital Library

(open access)

[12th International workshop on Inelastic Ion-Surface Collisions]

The twelfth international workshop on inelastic ion surface collisions was held at the Bahia Mar Resort and Conference Center on South Padre Island, Texas (USA) from January 24-29, 1999. The workshop brought together most of the leading researchers from around the world to focus on both the theoretical and experimental aspects of particle - surface interactions and related topics.

Date: October 15, 1999

Creator: Rabalais, J. W. & Nordlander, P.

Object Type: Article

System: The UNT Digital Library

(open access)

15th Street News (Midwest City, Okla.), Vol. 28, No. 31, Ed. 1 Thursday, July 15, 1999

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.

Date: July 15, 1999

Creator: Pace, Joshua

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

2401-W Waste storage building closure plan

This plan describes the performance standards met and closure activities conducted to achieve clean closure of the 2401-W Waste Storage Building (2401-W) (Figure I). In August 1998, after the last waste container was removed from 2401-W, the U.S. Department of Energy, Richland Operations Office (DOE-RL) notified Washington State Department of Ecology (Ecology) in writing that the 2401-W would no longer receive waste and would be closed as a Resource Conservation and Recovery Act (RCRA) of 1976 treatment, storage, and/or disposal (TSD) unit (98-EAP-475). Pursuant to this notification, closure activities were conducted, as described in this plan, in accordance with Washington Administrative Code (WAC) 173-303-610 and completed on February 9, 1999. Ecology witnessed the closure activities. Consistent with clean closure, no postclosure activities will be necessary. Because 2401-W is a portion of the Central Waste Complex (CWC), these closure activities become the basis for removing this building from the CWC TSD unit boundary. The 2401-W is a pre-engineered steel building with a sealed concrete floor and a 15.2-centimeter concrete curb around the perimeter of the floor. This building operated from April 1988 until August 1998 storing non-liquid containerized mixed waste. All waste storage occurred indoors. No potential existed for 2401-W operations …

Date: July 15, 1999

Creator: Luke, S. M.

Object Type: Report

System: The UNT Digital Library

(open access)

2nd Generation PFBC Systems R&D Phase 2 AND Phase 3

This report is descriptive journey of the 2nd Generation PFBC Systems R&D Phase 2 AND Phase 3.

Date: December 15, 1999

Creator: Robertson, Archie

Object Type: Report

System: The UNT Digital Library

(open access)

3Q/4Q98 Annual M-Area and Metallurgical Laboratory Hazardous Waste Management Facility Groundwater Monitoring and Correction-Action Report, Volumes I, II, and III

This report describes the groundwater monitoring and corrective-action program at the M-Area Hazardous Waste Management Facility (HWMF) and the Metallurgical Laboratory (Met Lab) HWMF at the Savannah River Site (SRS) during 1998.

Date: April 15, 1999

Creator: Chase, J.

Object Type: Report

System: The UNT Digital Library

(open access)

AN ACTIVE FRACTURE MODEL FOR UNSATURATED FLOW AND TRANSPORT

Fracture/matrix (F/M) interaction is a key factor affecting flow and transport in unsaturated fractured rocks. In classic continuum approaches (Warren and Root, 1963), it is assumed that flow occurs through all the connected fractures and is uniformly distributed over the entire fracture area, which generally gives a relatively large F/M interaction. However, fractures seem to have limited interaction with the surrounding matrix at Yucca Mountain, Nevada, as suggested by geochemical nonequilibrium between the perched water (resulting mainly from fracture flow) and pore water in the rock matrix. Because of the importance of the F/M interaction and related issues, there is a critical need to develop new approaches to accurately consider the interaction reduction inferred from field data at the Yucca Mountain site. Motivated by this consideration, they have developed an active fracture model based on the hypothesis that not all connected fractures actively conduct water in unsaturated fractured rocks.

Date: September 15, 1999

Creator: HUI-HAI LIU, GUDMUNDUR S. BODVARSSON AND CHRISTINE DOUGHTY

Object Type: Report

System: The UNT Digital Library

(open access)

Ad-dimers on Strained Carbon Nanotubes: A New Route for Quantum Dot Formation?

Article on ad-dimers on strained carbon nano-tubes.

Date: November 15, 1999

Creator: Orlikowski, Daniel; Buongiorno Nardelli, Marco; Bernholc, Jerry & Roland, Christopher

Object Type: Article

System: The UNT Digital Library

(open access)

Advanced Cuttings Transport Study Quarterly Report: July-October 1999

This report includes a review of the progress made in ACTF Flow Loop development and research during 90 days pre-award period (May 15-July 14, 1999) and the following three months after the project approval date (July15-October 15, 1999) The report presents information on the following specific subjects; (a) Progress in Advanced Cuttings Transport Facility design and development, (b) Progress report on the research project ''Study of Flow of Synthetic Drilling Fluids Under Elevated Pressure and Temperature Conditions'', (c) Progress report on the research project ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)'', (d) Progress report on the research project ''Study of Cuttings Transport with Aerated Muds Under LPAT Conditions (Joint Project with TUDRP)'', (e) Progress report on the research project ''Study of Foam Flow Behavior Under EPET Conditions'', (f) Progress report on the instrumentation tasks (Tasks 11 and 12) (g) Activities towards technology transfer and developing contacts with oil and service company members.

Date: October 15, 1999

Creator: Kuru, Ergun; Miska, Stefan; Takach, Nicholas; Ashenayi, Kaveh; Kane, Gerald; Volk, Len et al.

Object Type: Report

System: The UNT Digital Library

(open access)

Advanced Nuclear Measurements - Sensitivity Analysis Emerging Safeguards, Problems and Proliferation Risk

During the past year this component of the Advanced Nuclear Measurements LDRD-DR has focused on emerging safeguards problems and proliferation risk by investigating problems in two domains. The first is related to the analysis, quantification, and characterization of existing inventories of fissile materials, in particular, the minor actinides (MA) formed in the commercial fuel cycle. Understanding material forms and quantities helps identify and define future measurement problems, instrument requirements, and assists in prioritizing safeguards technology development. The second problem (dissertation research) has focused on the development of a theoretical foundation for sensor array anomaly detection. Remote and unattended monitoring or verification of safeguards activities is becoming a necessity due to domestic and international budgetary constraints. However, the ability to assess the trustworthiness of a sensor array has not been investigated. This research is developing an anomaly detection methodology to assess the sensor array.

Date: July 15, 1999

Creator: Dreicer, J. S.

Object Type: Report

System: The UNT Digital Library

(open access)

Advanced Thermal Barrier Coating System Development. Technical progress report

The objectives of the program are to provide an improved TBC system with increased temperature capability and improved reliability relative to current state of the art TBC systems. The development of such a coating system is essential to the ATS engine meeting its objectives. The base program consists of three phases: Phase I: Program Planning - Complete; Phase II: Development; and Phase III: Selected Specimen - Bench Test. Work is being performed in Phase II and III of the program.

Date: October 15, 1999

Creator: unknown

Object Type: Report

System: The UNT Digital Library

(open access)

Air Quality: EPA's Ozone Transport Rule, OTAG, and Section 216 Petitions - A Hazy Situation?

The 1990 Clean Air Act Amendments provided the Environmental Protection Agency (EPA) and the states with new tool to address the problem of interstate transport of air pollutants. This report discusses the actions undertaken as a direct result of this act, additional pollution reduction enforcement measures pursued by the EPA, and actions undertaken by states to reduce offending emissions not in compliance with these measures.

Date: June 15, 1999

Creator: Parker, Larry & Blodgett, John E.

Object Type: Report

System: The UNT Digital Library

(open access)

The Albany News (Albany, Tex.), Vol. 124, No. 5, Ed. 1 Thursday, July 15, 1999

Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.

Date: July 15, 1999

Creator: Lucas, Donnie A.

Object Type: Newspaper

System: The Portal to Texas History

(open access)

The Albany News (Albany, Tex.), Vol. 125, No. 46, Ed. 1 Thursday, April 15, 1999

Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.

Date: April 15, 1999

Creator: Lucas, Donnie A.

Object Type: Newspaper

System: The Portal to Texas History

(open access)

Alignment of the VISA Undulator

The Visible-Infrared SASE Amplifier (VISA) undulator consists of four 99cm long segments. Each undulator segment is set up on a pulsed-wire bench, to characterize the magnetic properties and to locate the magnetic axis of the FODO array. Subsequently, the location of the magnetic axis, as defined by the wire, is referenced to tooling balls on each magnet segment by means of a straightness interferometer. After installation in the vacuum chamber, the four magnet segments are aligned with respect to themselves and globally to the beam line reference laser. A specially designed alignment fixture is used to mount one straightness interferometer each in the horizontal and vertical plane of the beam. The goal of these procedures is to keep the combined rms trajectory error, due to magnetic and alignment errors, to 50{micro}m.

Date: April 15, 1999

Creator: Ruland, Robert

Object Type: Report

System: The UNT Digital Library

(open access)

ALPS - advanced limiter-divertor plasma-facing systems.

The Advanced Limiter-divertor Plasma-facing Systems (ALPS) program was initiated in order to evaluate the potential for improved performance and lifetime for plasma-facing systems. The main goal of the program is to demonstrate the advantages of advanced limiter/divertor systems over conventional systems in terms of power density capability, component lifetime, and power conversion efficiency, while providing for safe operation and minimizing impurity concerns for the plasma. Most of the work to date has been applied to free surface liquids. A multi-disciplinary team from several institutions has been organized to address the key issues associated with these systems. The main performance goals for advanced limiters and diverters are a peak heat flux of >50 MW/m{sup 2},elimination of a lifetime limit for erosion, and the ability to extract useful heat at high power conversion efficiency ({approximately}40%). The evaluation of various options is being conducted through a combination of laboratory experiments, modeling of key processes, and conceptual design studies. The current emphasis for the work is on the effects of free surface liquids on plasma edge performance.

Date: September 15, 1999

Creator: Allain, J. P.; Bastasz, R.; Brooks, J. N.; Evans, T.; Hassanein, A.; Luckhardt, S. et al.

Object Type: Article

System: The UNT Digital Library