Serial/Series Title
GRIDS Program
5
Hanford Works Monthly Report
3
Acoustical Imaging and Mechanical Properties of Soft Rock and Marine Sediments Progress Report
2
Single Electron Chemistry of Coals Progress Report
2
Winter Fuels Report
2
A Program of FRC Theory Research Annual Report
1
ARM Facilities Newsletter
1
Activities to Support Establishment of a Sea Floor Monitoring Station Project Progress Report
1
Ceramic Membranes for Hydrogen Production From Coal Annual Report
1
Development of ITM Oxygen Technology for Integration in IGCC & Other Advanced Power Generation Systems (ITM Oxygen) Progress Report
1
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Characterization of the LiSi/CsBr-LiBr-KBr/FeS(2) System for Potential Use as a Geothermal Borehole Power Source
We are continuing to study the suitability of modified thermal-battery technology as a potential power source for geothermal borehole applications. Previous work focused on the LiSi/FeS{sub 2} couple over a temperature range of 350 C to 400 C with the LiBr-KBr-LiF eutectic, which melts at 324.5 C. In this work, the discharge processes that take place in LiSi/CsBr-LiBr-KBr eutectic/FeS{sub 2} thermal cells were studied at temperatures between 250 C and 400 C using pelletized cells with immobilized electrolyte. The CsBr-LiBr-KBr eutectic was selected because of its lower melting point (228.5 C). Incorporation of a quasi-reference electrode allowed the determination of the relative contribution of each electrode to the overall cell polarization. The results of single-cell tests and limited battery tests are presented, along with preliminary data for battery stacks tested in a simulated geothermal borehole environment.
Date:
October 18, 1999
Creator:
GUIDOTTI, RONALD A. & REINHARDT, FREDERICK W.
Object Type:
Article
System:
The UNT Digital Library
Volatilization of Fission Products from Metallic Melts in the Melt-Dilute Treatment Technology Development for Al-Based DOE Spent Nuclear Fuels
The melt-dilute treatment technology is being developed to facilitate the ultimate disposition of highly enriched Al-Base DOE spent nuclear fuels in a geologic repository such as that proposed for Yucca Mountain. Currently, approximately 28 MTHM is expected to be returned to the Savannah River Site from domestic and foreign research reactors. The melt-dilute treatment technology will melt the fuel assemblies to reduce their volume and alloys them with depleted uranium to isotopically dilute the 235U concentration. The resulting alloy is cast into a form for long term geologic repository storage. Benefits accrued from the melt-dilute process include the potential for significant volume reduction; reduced criticality potential, and proliferation concerns. A critical technology element in the development of the melt-dilute process is the development of offgas system requirements. The volatilization of radioactive species during the melting stage of the process primarily constitutes the offgas in this process. Several of the species present following irradiation of a fuel assembly have been shown to be volatile or semi-volatile under reactor core melt-down conditions. Some of the key species that have previously been studied are krypton, iodine, and cesium. All of these species have been shown to volatilize during melting experiments however, the degree …
Date:
November 18, 1999
Creator:
Adams, T.
Object Type:
Article
System:
The UNT Digital Library
Fundamental limits on beam stability at the Advanced Photon Source.
Orbit correction is now routinely performed at the few-micron level in the Advanced Photon Source (APS) storage ring. Three diagnostics are presently in use to measure and control both AC and DC orbit motions: broad-band turn-by-turn rf beam position monitors (BPMs), narrow-band switched heterodyne receivers, and photoemission-style x-ray beam position monitors. Each type of diagnostic has its own set of systematic error effects that place limits on the ultimate pointing stability of x-ray beams supplied to users at the APS. Limiting sources of beam motion at present are magnet power supply noise, girder vibration, and thermal timescale vacuum chamber and girder motion. This paper will investigate the present limitations on orbit correction, and will delve into the upgrades necessary to achieve true sub-micron beam stability.
Date:
June 18, 1998
Creator:
Decker, G. A.
Object Type:
Article
System:
The UNT Digital Library
Creating a Comprehensive Solar Water Heating Deployment Strategy
This report details the results of a research conducted in 1998 and 1999 and outlines a marketing deployment plan designed for businesses interested in marketing solar water heaters in the new home industry.
Date:
August 18, 1999
Creator:
Services, Focus Marketing
Object Type:
Report
System:
The UNT Digital Library
Vibratory response modeling and verification of a high precision optical positioning system.
A generic vibratory-response modeling program has been developed as a tool for designing high-precision optical positioning systems. Based on multibody dynamics theory, the system is modeled as rigid-body structures connected by linear elastic elements, such as complex actuators and bearings. The full dynamic properties of each element are determined experimentally or theoretically, then integrated into the program as inertial and stiffness matrices. Utilizing this program, the theoretical and experimental verification of the vibratory behavior of a double-multilayer monochromator support and positioning system is presented. Results of parametric design studies that investigate the influence of support floor dynamics and highlight important design issues are also presented. Overall, good matches between theory and experiment demonstrate the effectiveness of the program as a dynamic modeling tool.
Date:
June 18, 1999
Creator:
Barraza, J.; Kuzay, T.; Royston, T. J. & Shu, D.
Object Type:
Article
System:
The UNT Digital Library
Language interoperability for high-performance parallel scientific components
With the increasing complexity and interdisciplinary nature of scientific applications, code reuse is becoming increasingly important in scientific computing. One method for facilitating code reuse is the use of components technologies, which have been used widely in industry. However, components have only recently worked their way into scientific computing. Language interoperability is an important underlying technology for these component architectures. In this paper, we present an approach to language interoperability for a high-performance parallel, component architecture being developed by the Common Component Architecture (CCA) group. Our approach is based on Interface Definition Language (IDL) techniques. We have developed a Scientific Interface Definition Language (SIDL), as well as bindings to C and Fortran. We have also developed a SIDL compiler and run-time library support for reference counting, reflection, object management, and exception handling (Babel). Results from using Babel to call a standard numerical solver library (written in C) from C and Fortran show that the cost of using Babel is minimal, where as the savings in development time and the benefits of object-oriented development support for C and Fortran far outweigh the costs.
Date:
May 18, 1999
Creator:
Elliot, N; Kohn, S & Smolinski, B
Object Type:
Article
System:
The UNT Digital Library
Direct Fast-Neutron Detection: A Progress Report
It is widely acknowledged that Mure neutron-detection technologies will need to offer increased performance at lower cost. One clear route toward these goals is rapid and direct detection of fast neutrons prior to moderation. This report describes progress to date in an effort to achieve such neutron detection via proton recoil within plastic scintillator. Since recording proton-recoil events is of little practical use without a means to discriminate effectively against gamma-ray interactions, the present effort is concentrated on demonstrating a method that distinguishes between pulse types. The proposed method exploits the substantial difference in the speed of fission neutrons and gamma-ray photons. Should this effort ultimately prove successful, the resulting. technology would make a valuable contribution toward meeting the neutron-detection needs of the next century. This report describes the detailed investigations that have been part of Pacific Northwest National Laborato@s efforts to demonstrate direct fast-neutron detection in the laboratory. Our initial approach used a single, solid piece of scintillator along with the electronics needed for pulse-type differentiation. Work to date has led to the conclusion that faster scintillator and/or faster electronics will be necessary before satisfactory gamma-ray discrimination is achieved with this approach. Acquisition and testing of both faster scintillator …
Date:
October 18, 1998
Creator:
Peurrung, AJ; Stromswold, DC; Reeder, PL & Hansen, RR
Object Type:
Report
System:
The UNT Digital Library
Production code control system for hydrodynamics simulations
We describe how the Production Code Control System (pCCS), written in Perl, has been used to control and monitor the execution of a large hydrodynamics simulation code in a production environment. We have been able to integrate new, disparate, and often independent, applications into the PCCS framework without the need to modify any of our existing application codes. Both users and code developers see a consistent interface to the simulation code and associated applications regardless of the physical platform, whether an MPP, SMP, server, or desktop workstation. We will also describe our use of Perl to develop a configuration management system for the simulation code, as well as a code usage database and report generator. We used Perl to write a backplane that allows us plug in preprocessors, the hydrocode, postprocessors, visualization tools, persistent storage requests, and other codes. We need only teach PCCS a minimal amount about any new tool or code to essentially plug it in and make it usable to the hydrocode. PCCS has made it easier to link together disparate codes, since using Perl has removed the need to learn the idiosyncrasies of system or RPC programming. The text handling in Perl makes it easy to …
Date:
August 18, 1997
Creator:
Slone, D.M.
Object Type:
Article
System:
The UNT Digital Library
Estimating Wet Bulb Globe Temperature Using Standard Meteorological Measurements
The heat stress management program at the Department of Energy''s Savannah River Site (SRS) requires implementation of protective controls on outdoor work based on observed values of wet bulb globe temperature (WBGT). To ensure continued compliance with heat stress program requirements, a computer algorithm was developed which calculates an estimate of WBGT using standard meteorological measurements. In addition, scripts were developed to generate a calculation every 15 minutes and post the results to an Intranet web site.
Date:
November 18, 1999
Creator:
Hunter, C.H.
Object Type:
Article
System:
The UNT Digital Library
Mechanical properties and microstructural characteristics of laser and electron-beam welds in V-4Cr-4Ti.
Mechanical properties and microstructural characteristics of laser and electron-beam welds of a 500-kg heat of V4Cr4Ti were investigated in as-welded condition and after postwelding heat treatment by impact testing, microhardness measurement, optical microscopy, X-ray diffraction, and transmission electron microscopy (TEM). Ductile-brittle transition temperatures of the laser and electron-beam welds were significantly higher than that of the base metal. However, excellent impact properties could be restored in both types of welds by postwelding annealing at 1000 C for 1 h in vacuum. Analysis by TEM revealed that annealed weld zones were characterized by extensive networks of fine V(C,O,N) precipitates, which clean away O, C, and N interstitial from the grain matrices. This process is accompanied by simultaneous annealing-out of the dense dislocations present in the weld zone. This finding could be useful in identifying an optimal welding procedure by controlling and adjusting the cooling rate of the weld zone by an innovative method to maximize the precipitation of V(C,O,N).
Date:
May 18, 1998
Creator:
Chung, H. M.
Object Type:
Article
System:
The UNT Digital Library
INEL5-single-crystal chopper spectrometer-reference instrument WBS 1.7.12.
INEL5 is designed for the study of relatively high energy cooperative excitations in single crystals. Figure 1 provides a schematic representation of INEL5, and Table 1 gives the parameters for this instrument. The use of linear position sensitive detectors provides good vector Q resolution, and the coverage of a large solid angle at low scattering angles permits sampling of the necessary regions of reciprocal space to follow the dispersion of these excitations. The instrument is optimized for studies with relatively high incident energies (tens to hundreds of meV), but can also be used with incident energies as low as 10 meV. Provision is made to allow addition at a later date of a detector bank at higher scattering angles in order to enhance the capabilities for the lower energy transfer studies.
Date:
January 18, 1999
Creator:
Crawford, R.K.
Object Type:
Report
System:
The UNT Digital Library
Preparation of a 1 mg/cm{sup 2} {sup 13}C target.
We give a description for the production of {sup 13}C foils and the preparation of an approximately 1 mg/cm{sup 2} thick target. A recent experiment to measure the mass of {sup 36}Ca via the {sup 40}Ca({sup 4}He,{sup 8}He){sup 36}Ca reaction at the S800 magnetic spectrometer at MSU, needed a precise determination of the beam energy and calibration of the focal plane of the magnetic spectrometer in order to achieve the most accurate value for the {sup 36}Ca mass. The 1 mg/cm{sup 2} {sup 13}C target was essential for these purposes. Target performance along with some preliminary results will also be discussed.
Date:
November 18, 1998
Creator:
Greene, J. P.
Object Type:
Article
System:
The UNT Digital Library
The identification of complex ions in solution by spectrophotometric measurements
A theoretical discussion of the formation and steady state kinetic behavior of metal complexes is provided.
Date:
May 18, 1948
Creator:
Staniforth, R.A.
Object Type:
Report
System:
The UNT Digital Library
Hybrid Microwave Treatment of SRS TRU and Mixed Wastes
A new process, using hybrid microwave energy, has been developed as part of the Strategic Research and Development program and successfully applied to treatment of a wide variety of non-radioactive materials, representative of SRS transuranic (TRU) and mixed wastes. Over 35 simulated (non-radioactive) TRU and mixed waste materials were processed individually, as well as in mixed batches, using hybrid microwave energy, a new technology now being patented by Westinghouse Savannah River Company (WSRC).
Date:
November 18, 1999
Creator:
Wicks, G. G.
Object Type:
Report
System:
The UNT Digital Library
Corrosion behavior of environmental assessment glass in product consistency tests of extended duration.
We have conducted static dissolution tests to study the corrosion behavior of the Environmental Assessment (EA) glass, which is the benchmark glass for high-level waste glasses being produced at US Department of Energy facilities. These tests were conducted to evaluate the behavior of the EA glass under the same long-term and accelerated test conditions that are being used to evaluate the corrosion of waste glasses. Tests were conducted at 90 C in a tuff groundwater solution at glass surface area/solution volume (WV) ratios of about 2000 and 20,000 m{sup {minus}1}. The glass dissolved at three distinct dissolution rates in tests conducted at 2000 m{sup {minus}1}. Based on the release of boron, dissolution within the first seven days occurred at a rate of about 0.65 g/(m{sup 2} {center_dot} d). The rate between seven and 70 days decreased to 0.009 g/(m{sup 2} {center_dot} d). An increase in the dissolution rate occurred at longer times after the precipitation of zeolite phases analcime, gmelinite, and an aluminum silicate base. The dissolution rate after phase formation was about 0.18 g/(m{sup 2} {center_dot} d). The formation of the same zeolite alteration phases occurred after about 20 days in tests at 20,000 m{sup {minus}}. The average dissolution …
Date:
November 18, 1998
Creator:
Bates, J.K.; Buck, E.C.; Ebert, W.L.; Luo, J.S. & Tam, S.W.
Object Type:
Report
System:
The UNT Digital Library
Development of niobium spoke cavities for a superconducting light-ion Linac.
This paper reports the development of 350 MHz niobium superconducting cavities for the velocity range 0.2< v/c <0.6. Such cavities could be used to form a linac of exceptional flexibility, capable of efficiently accelerating beams of either protons, deuterons, or any of a wide range of light ions, at intensities sufficient for a production beam for a radioactive beam facility. Results of numerical modeling for several resonator geometries are presented. The design and construction status of prototype niobium cavities is discussed.
Date:
November 18, 1998
Creator:
Shepard, K. W.
Object Type:
Article
System:
The UNT Digital Library
F-Area Hazardous Waste Management Facility Semiannual Correction Action Report, Vol. I and II
The groundwater in the uppermost aquifer beneath the F-Area Hazardous Waste Management Facility (HWMF) at the Savannah River Site is routinely monitored for selected hazardous and radioactive constituents. This report presents the results of the required groundwater monitoring program.
Date:
November 18, 1999
Creator:
Chase, J.
Object Type:
Report
System:
The UNT Digital Library
Radiological dose assessment of the disposal of NORM wastes via landspreading.
Petroleum production activities sometimes result in the accumulation of naturally occurring radioactive materials (NORM) at elevated concentrations in by-product waste streams, such as scale and sludge. In the past, the petroleum industry commonly disposed of these wastes via landspreading, a practice consisting of spreading the waste over the soil surface and, sometimes, mixing it into the top layer of soil. Potential radiological doses to workers and the general public from landspreading of NORM waste have been assessed for a variety of scenarios, including the landspreading worker scenario and future residential, industrial, recreational, and agricultural scenarios. The exposure pathways evaluated include external radiation, inhalation of resuspended dust and radon, ingestion of soil and groundwater, and ingestion of contaminated foodstuff grown on the property. In general, potential doses to landspreading workers and members of the general public exposed through future recreational or agricultural use of the property are negligible. Potential doses to future residential or industrial users can vary greatly, depending on such factors as type of building construction, presence or absence of clean cover material, and on-site erosion rates. On the basis of the results presented in this paper, it is recommended that (a) any landspreading activity that would result in …
Date:
December 18, 1998
Creator:
Smith, K. P.
Object Type:
Article
System:
The UNT Digital Library
Task 3.14 - Demonstration of Technologies for Remote Power Generation in Alaska
None
Date:
June 18, 1997
Creator:
Mann, Michael D.
Object Type:
Report
System:
The UNT Digital Library
A future vision of nuclear material information systems
To address the current and future needs for nuclear materials management and safeguards information, Lawrence Livermore National Laboratory envisions an integrated nuclear information system that will support several functions. The vision is to link distributed information systems via a common communications infrastructure designed to address the information interdependencies between two major elements: Domestic, with information about specific nuclear materials and their properties, and International, with information pertaining to foreign nuclear materials, facility design and operations. The communication infrastructure will enable data consistency, validation and reconciliation, as well as provide a common access point and user interface for a broad range of nuclear materials information. Information may be transmitted to, from, and within the system by a variety of linkage mechanisms, including the Internet. Strict access control will be employed as well as data encryption and user authentication to provide the necessary information assurance. The system can provide a mechanism not only for data storage and retrieval, but will eventually provide the analytical tools necessary to support the U.S. government's nuclear materials management needs and non-proliferation policy goals.
Date:
July 18, 1999
Creator:
Suski, N. & Wimple, C.
Object Type:
Article
System:
The UNT Digital Library
Advanced Commercial Liquid-Desiccant Technology Development Study
The objective of this report is to provide information to help DOE plan its future activities on liquid-desiccant technologies. The report meets this objective by (1) identifying commercial and residential markets where the liquid-desiccant systems will first be most successful and (2) identifying advances in the individual components of a liquid-desiccant system that will allow it to expand into new markets.
Date:
November 18, 1998
Creator:
Lowenstein, A. (AIL Research, Inc.); Slayzak, S.; Ryan, J. & Pesaran, A. (National Renewable Energy Laboratory)
Object Type:
Report
System:
The UNT Digital Library
Building 594 waste ion exchange facility final survey report.
The Waste Ion Exchange Facility was free released for demolition on July 30, 1998. No surprises or unknowns were noted. The building and associated piping were demolished and removed in September, 1998. The north drain line was removed to three feet outside of the foundation of the building. The east drain line was removed to the foundation of Building 593. The piping located in the north pit drain and east pit drain (which were located under the concrete) were free released. The catch basin, which was located on the south side of the building and also connected to equalization tanks in building 592, was released for unrestricted use and was left intact.
Date:
November 18, 1998
Creator:
Geraghty, D. C.
Object Type:
Report
System:
The UNT Digital Library
INEL4-wide-angle chopper spectrometer-reference instrument WBS 1.7.7.
INEL4 is designed to be the workhorse instrument for inelastic studies requiring good resolution and extended ranges in both Q and E. Figure 1 provides a schematic representation of INEL4, and Table 1 provides the parameters for this instrument. This instrument is capable of studies involving energy transfers ranging from a few meV to more than 1 eV. The wide angular coverage and large solid angle of detectors provide relatively high data rates and an extensive Q range.
Date:
January 18, 1999
Creator:
Crawford, R.K.
Object Type:
Report
System:
The UNT Digital Library
YUCCA Mountain Project - Argonne National Laboratory, Annual Progress Report, FY 1997 for activity WP 1221 unsaturated drip condition testing of spent fuel and unsaturated dissolution tests of glass.
This document reports on the work done by the Nuclear Waste Management Section of the Chemical Technology Division of Argonne National Laboratory in the period of October 1996 through September 1997. Studies have been performed to evaluate the behavior of nuclear waste glass and spent fuel samples under the unsaturated conditions (low-volume water contact) that are likely to exist in the Yucca Mountain environment being considered as a potential site for a high-level waste repository. Tests with actinide-doped waste glasses, in progress for over 11 years, indicate that the transuranic element release is dominated by colloids that continuously form and span from the glass surface. The nature of the colloids that form in the glass and spent fuel testing programs is being investigated by dynamic light scattering to determine the size distribution, by autoradiography to determine the chemistry, and by zeta potential to measure the electrical properties of the colloids. Tests with UO{sub 2} have been ongoing for 12 years. They show that the oxidation of UO{sub 2} occurs rapidly, and the resulting paragenetic sequence of secondary phases forming on the sample surface is similar to that observed for uranium found in natural oxidizing environments. The reaction of spent fuel …
Date:
September 18, 1998
Creator:
Bates, J. K.; Buck, E. C.; Emery, J. W.; Finch, R. J.; Finn, P. A.; Fortner, J. et al.
Object Type:
Report
System:
The UNT Digital Library