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369 Matching Results

Start Over Year 1998 Day 12th Language English

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prev Results: 73 - 96 of 369 next

(open access)

Stabilization of in-tank residual wastes and external tank soil contamination for the Hanford tank closure program: application to the AX tank farm

Mixed high-level waste is currently stored in underground tanks at the US Department of Energy's (DOE's) Hanford Site. The plan is to retrieve the waste, process the water, and dispose of the waste in a manner that will provide less long-term health risk. The AX Tank Farm has been identified for purposes of demonstration. Not all the waste can be retrieved from the tanks and some waste has leaked from these tanks into the underlying soil. Retrieval of this waste could result in additional leakage. During FY1998, the Sandia National Laboratory was under contract to evaluate concepts for immobilizing the residual waste remaining in tanks and mitigating the migration of contaminants that exist in the soil column. Specifically, the scope of this evaluation included: development of a layered tank fill design for reducing water infiltration; development of in-tank getter technology; mitigation of soil contamination through grouting; sequestering of specific radionuclides in soil; and geochemical and hydrologic modeling of waste-water-soil interactions. A copy of the final report prepared by Sandia National Laboratory is attached.

Date: October 12, 1998

Creator: SONNICHSEN, J.C.

Object Type: Report

System: The UNT Digital Library

(open access)

Optimum Condition for Accurate Heat Capacity Measurements in Temperature-Modulated Differential Scanning Calorimetry

We explored the optimum conditions in modulation of the program temperature and sample preparation to obtain absolute values of heat capac- ity from quasi-isothermal measurements of temperature-modulated differen- tial scanning calorimetry. A Mettler-Toledo 820 calorimeter and Perkin-Elmer DSC 7 were used for this work, using saw-tooth modulation as well as sinu- soidal modulation. We adopted a simple model to analyze the temperature response of the calorimeters and calibrated the results more precisely.

Date: September 12, 1998

Creator: Androsch, R.J.; Moon, K. & Wunderlich, B.

Object Type: Article

System: The UNT Digital Library

(open access)

Texas Register, Volume 23, Number 24, Pages 6097-6366, June [12], 1998

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.

Date: June 12, 1998

Creator: Texas. Secretary of State.

Object Type: Journal/Magazine/Newsletter

System: The Portal to Texas History

(open access)

[Article from The Dallas Voice, June 12, 1998]

Clipping from the Dallas Voice newspaper of an article titled "Log Cabin to lead demonstration". The piece informs readers of the reason and location for the upcoming demonstration which will be held at the Fort Worth Water Gardens during a GOP gathering.

Date: June 12, 1998

Creator: Nash, Tammye

Object Type: Clipping

System: The UNT Digital Library

(open access)

An evaluation of the management system verification pilot at Hanford

The Chemical Management System (CMS), currently under development at Hanford, was used as the ''test program'' for pilot testing the value added aspects of the Chemical Manufacturers Association's (CMA) Management Systems Verification (MSV) process. The MSV process, which was developed by CMA's member chemical companies specifically as a tool to assist in the continuous improvement of environment, safety and health (ESH) performance, represents a commercial sector ''best practice'' for evaluating ESH management systems. The primary purpose of Hanford's MSV Pilot was to evaluate the applicability and utility of the MSV process in the Department of Energy (DOE) environment. However, because the Integrated Safety Management System (ISMS) is the framework for ESH management at Hanford and at all DOE sites, the pilot specifically considered the MSV process in the context of a possible future adjunct to Integrated Safety Management System Verification (ISMSV) efforts at Hanford and elsewhere within the DOE complex. The pilot involved the conduct of two-hour interviews with four separate panels of individuals with functional responsibilities related to the CMS including the Department of Energy Richland Operations (DOE-RL), Fluor Daniel Hanford (FDH) and FDH's major subcontractors (MSCS). A semi-structured interview process was employed by the team of three ''verifiers'' …

Date: November 12, 1998

Creator: BRIGGS, C.R.

Object Type: Report

System: The UNT Digital Library

(open access)

Quarterly Progress Report

The Federal Energy Technology Center (FETC) at Pittsburgh contracted with the MJTRE Corporation to perform Research Guidance Studies that will assist the Center and other relevant offices in the Department of Energy in evaluating and prioritizing research in the areas of coal and natural gas conversion. MITRE was reorganized in December 1995, which resulted in the formation of Mitretek Systems Inc. Mitretek has been performing this work on MITRE's behalf awaiting completion of contract novation to Mitretek. The contract was novated in February 1998 to Mitretek Systems. The overall objectives of this contract are to provide support to DOE in the following areas: (1) technical and economic analyses of current and future coal-based energy conversion technologies and other similar emerging technologies such as coal-waste coprocessing, natural gas conversion, and biomass conversion technologies for the production of fuels, chemicals and electric power,(2) monitor progress in these technologies with respect to technical, economic, and environmental impact (including climate change), (3) conduct specific and generic project economic and technical feasibility studies based on these technologies, (4) identify long-range R&D areas that have the greatest potential for process improvements, and (5) investigate optimum configurations and associated costs for production of high quality energy products …

Date: November 12, 1998

Creator: Gray, David & Tomlinson, Glen

Object Type: Report

System: The UNT Digital Library

(open access)

Abstracts of the third international conference on the solid-state lasers for application to inertial confinement fusion

None

Date: June 12, 1998

Creator: Lowdermilk, W H

Object Type: Article

System: The UNT Digital Library

(open access)

Kaon electroproduction on deuterium.

Kaon electroproduction on deuterium and hydrogen targets has been measured at beam energies of 3.245 and 2.445 GeV and momentum transfer Q{sup 2}=0.38 and 0.5 GeV{sup 2}. Associated {Lambda} production off a proton in the deuteron exhibits a quasifree production mechanism. The production of {Sigma}{sup {minus}} off the neutron could be extracted for the first time with reasonable errors.

Date: January 12, 1998

Creator: Reinhold, J.

Object Type: Article

System: The UNT Digital Library

(open access)

Equation of state of insensitive high explosives

Detonation of an insensitive high explosive formulated with a fluorine containing binder produces a large amount of condensed carbon and gaseous HF product, which transforms into CF{sub 4} as the pressure is increased. The former (carbon condensation) is characterized by slow energy release, while the latter (HF) has no shockwave data. We have identified that these two items are the key factors, which make reliable prediction of the performance of an insensitive high explosive very difficult. This paper describes physical models to address these issues and apply the models to analyze experimental data of LX-17.

Date: August 12, 1998

Creator: Ree, F H; Van Thiel, M & Viecelli, J A

Object Type: Article

System: The UNT Digital Library

(open access)

Mechanical properties of Ce{sub 0.9}Gd{sub 0.1}O{sub 2-x} and Ce{sub 0.9}Gd{sub 0.1}O{sub 2-x} + Al{sub 2}O{sub 3} composites.

The room-temperature elastic moduli, fracture strength, and fracture toughness of dense, fine-grained, pure Ce{sub 0.9}Gd{sub 0.1}O{sub 1.95} and composites containing 1.3 and 9.1 wt. % Al{sub 2}O{sub 3} were investigated. Addition of 9.1 wt.% Al{sub 2}O{sub 3} to Ce{sub 0.9}Gd{sub 0.1}O{sub 1.95} changed the fracture mode from intergranular to transgranular and increased room-temperature fracture strength from 65 to 125 MPa and fracture toughness from 1.3 to 1.6 MPam{sup 1/2}. In addition, steady-state compressive creep was measured for Ce{sub 0.9}Gd{sub 0.1}O{sub 1.95} and the Ce{sub 0.9}Gd{sub 0.1}O{sub 2{minus}x} + 9.1 wt.% Al{sub 2}O{sub 3} composite. The stress exponent {approx}1.3 and the activation energy {approx}480 kJ/mole for Ce{sub 0.9}Gd{sub 0.1}O{sub 1.95} suggested diffusional flow controlled by the cations. There was no difference in creep rate between Ce{sub 0.9}Gd{sub 0.1}O{sub 2{minus}x} and the composite.

Date: January 12, 1998

Creator: Routbort, J. L.

Object Type: Article

System: The UNT Digital Library

(open access)

DOE/FETC Gasis Project

Technical progress on the GAS IS project during the quarter for contract no. DE-AC21 -93 MC281 39 is described. During this period, work was performed on Task 4 Technology Transfer, Task 7: Software Enhancement, Task 8: Reservoir Data System Updates, and Task 9: Supplemental Reservoir Studies.

Date: November 12, 1998

Creator: Hugman, R. H.

Object Type: Report

System: The UNT Digital Library

(open access)

Application of Integrated Reservoir Management and Reservoir Characterization to Optimize Infill Drilling

Infill drilling if wells on a uniform spacing without regard to reservoir performance and characterization foes not optimize reservoir development because it fails to account for the complex nature of reservoir heterogeneities present in many low permeability reservoirs, and carbonate reservoirs in particular. New and emerging technologies, such as geostatistical modeling, rigorous decline curve analysis, reservoir rock typing, and special core analysis can be used to develop a 3-D simulation model for prediction of infill locations.

Date: March 12, 1998

Creator: unknown

Object Type: Report

System: The UNT Digital Library

(open access)

Mechanisms and modeling of single-event upset

The basic mechanisms of single-event upset are reviewed, including charge collection in silicon junctions and transistors, and properties of single-event upset in CMOS static random access memory (SRAM) cells. The mechanisms are illustrated through the use of three-dimensional device and circuit simulations. Technology trends and implications for commercial devices are discussed.

Date: October 12, 1998

Creator: Dodd, Paul E.

Object Type: Article

System: The UNT Digital Library

(open access)

Task 1.13 - Data Collection and Database Development for Clean Coal Technology By-Products Characteristics and Management Practices

Information from DOE projects and commercial endeavors in fluidized-bed combustion (FBC) and coal gasification is the focus of the task reported here. The primary goal is to provide an easily accessible compilation of characterization information on the by-products from these processes to government agencies and industry to facilitate sound regulatory and management decisions. Additional written documentation will facilitate the preparation of an updated final version of the DOE report to Congress on barriers to CCB utilization. The information assembled will be valuable to the U.S. Environmental Protection Agency (EPA) in its upcoming decision on the waste status of FBC by-products and had to be submitted to EPA by April 1997. This effort facilitates interaction between DOE and industry regarding input to EPA. The effort of DOE FETC to provide this type of information to EPA is consistent with the recommendation in the DOE Report to Congress on ash barriers that a determination placing CCT by-products under RCRA Subtitle D for solid wastes is needed if these materials are to be utilized. Several DOE projects have already investigated utilization of these materials, so this is an opportunity to give this information the emphasis it deserves.

Date: November 12, 1998

Creator: Pfughoeft-Hassett, Debra F.

Object Type: Report

System: The UNT Digital Library

(open access)

Avian Risk and Fatality Protocol

The protocol is designed to assist with the placement of wind power developments, and to document bird behavior and fatalities resulting from existing wind power developments. A standardized protocol will assist with comparing data among potential and existing development locations. Furthermore, this protocol is based on standard methods being used in other studies of bird behavior. The data collected will only be useful if observers follow each method carefully. In addition, the data collected using this protocol will likely be used by a permitting or other regulatory agency in evaluating the avian impacts at the site.

Date: November 12, 1998

Creator: Morrison, M. L.

Object Type: Report

System: The UNT Digital Library

(open access)

UNT program gets $600,000

A newspaper clipping, published by the Denton Record-Chronicle, features an article written by Lucinda Breeding, staff writer, titled "UNT program gets $600,000." The University of North Texas received a grant from the Edward and Betty Marcus Foundation, who have promised to fund the UNT Marcus Fellows Program. The new grant will fund five graduate students each year, fifteen total for three years, and each will receive a stipend of $15,000. In return the graduate students much work with the university faculty, museum staff and school teachers to create and test innovative ways to teach art.

Date: August 12, 1998

Creator: Breeding, Lucinda

Object Type: Clipping

System: The UNT Digital Library