Accurate Computer Simulation of a Drift Chamber (open access)

Accurate Computer Simulation of a Drift Chamber

A general purpose program for drift chamber studies is described. First the capacitance matrix is calculated using a Green's function technique. The matrix is used in a linear-least-squares fit to choose optimal operating voltages. Next the electric field is computed, and given knowledge of gas parameters and magnetic field environment, a family of electron trajectories is determined. These are finally used to make drift distance vs time curves which may be used directly by a track reconstruction program. Results are compared with data obtained from the cylindrical chamber in the Axial Field Magnet experiment at the CERN ISR.
Date: March 25, 1980
Creator: Killian, T J
Object Type: Article
System: The UNT Digital Library
Advanced coal gasification system for electric power generation. Third quarterly progress report, April 1-June 30, 1980 (open access)

Advanced coal gasification system for electric power generation. Third quarterly progress report, April 1-June 30, 1980

The operation, maintenance and modifications to the Westinghouse gasification process development unit during the quarter are reviewed. The tests of the gasifier-agglomerator included direct coal feed as well as oxygen-blown gasification of a char or coal bed. Then the whole system was tested in single and double stage operation. Laboratory support involved fluidized bed test facilities at ambient temperature and at design temperature for devolatilization and gasification studies. Other laboratory systems were related to thermal analysis and pressurized high temperature studies of gasification and gas cleaning. (LTN)
Date: July 25, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Advanced Gas-Cooled Nuclear Reactor Materials Evaluation and Development Program. Progress report, April 1, 1979-June 30, 1979 (open access)

Advanced Gas-Cooled Nuclear Reactor Materials Evaluation and Development Program. Progress report, April 1, 1979-June 30, 1979

The results are presented of work performed on the Advanced Gas-Cooled Nuclear Reactor Materials Evaluation and Development Program. The objectives of this program are to evaluate candidate alloys for Very High Temperature Reactor (VHTR) Nuclear Process Heat (NPH) and Direct Cycle Helium Turbine (DCHT) applications, in terms of the effect of simulated reactor primary coolant (helium containing small amounts of various other gases), high temperatures, and long time exposures, on the mechanical properties and structural and surface stability of selected candidate alloys. A second objective is to select and recommend materials for future test facilities and more extensive qualification programs. Work covered in this report includes the activities associated with the status of the simulated reactor helium supply system, testing equipment, and gas chemistry analysis instrumentation and equipment. The status of the data management system is presented. In addition, the progress in the screening test program is described.
Date: January 25, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Advanced Gas Cooled Nuclear Reactor Materials Evaluation and Development Program. Progress report, January 1, 1980-March 31, 1980 (open access)

Advanced Gas Cooled Nuclear Reactor Materials Evaluation and Development Program. Progress report, January 1, 1980-March 31, 1980

Results are presented of work performed on the Advanced Gas-Cooled Nuclear Reactor Materials Evaluation and Development Program. The objectives of this program are to evaluate candidate alloys for Very High Temperature Reactor (VHTR) Nuclear Process Heat (NPH) and Direct Cycle Helium Turbine (DCHT) applications, in terms of the effect of simulated reactor primary coolant (helium containing small amounts of various other gases), high temperatures, and long time exposures, on the mechanical properties and structural and surface stability of selected candidate alloys. A second objective is to select and recommend materials for future test facilities and more extensive qualification programs. Included are the activities associated with the status of the simulated reactor helium supply system, testing equipment and gas chemistry analysis instrumentation and equipment. The progress in the screening test program is described, including screening creep results and metallographic analysis for materials thermally exposed or tested at 750, 850, and 950/sup 0/C.
Date: June 25, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
AFR/design and licensing information/BNFP as a model. Technical progress report, January-March 1980 (open access)

AFR/design and licensing information/BNFP as a model. Technical progress report, January-March 1980

Work on this project is focused on developing design and licensing information for the model facility. Three major subcontracts have been approved by DOE and the design effort is progressing satisfactorily on the security system, rack design, and the soils structural and seismic design which these contracts cover. Licensing activities are progressing satisfactorily. About 50% of the Environmental Report is drafted and issued for preliminary review. Approximately 15% of the Safety Analysis Report has been drafted.
Date: April 25, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
AFR/Design and Licensing Information/BNFP As a Model. Technical progress report, October 1979-December 1979 (open access)

AFR/Design and Licensing Information/BNFP As a Model. Technical progress report, October 1979-December 1979

Work on the AFR spent fuel storage program is focused on developing design and licensing information for the model facility. To date, the design effort is proceeding on schedule. A subcontract for soils and structural design of the fuel transfers canal is ready for DOE review. Proposals for high-density rack design to bring the model facility up to a nominal 1750 MTU capacity have been received and are being reviewed internally. This subcontract should be available for DOE review in early February. A security subcontract has been awarded to International Energy Associates Limited and the preliminary design effort is underway. Licensing activities are progressing satisfactorily. Review of the governing local, state, and federal regulations has been completed. Format and schedule for the safety analysis report and the environmental report have been established.
Date: January 25, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
AFR Spent Fuel Storage Program. Technical progress report, April 1980-June 1980 (open access)

AFR Spent Fuel Storage Program. Technical progress report, April 1980-June 1980

Work on this project is focused on developing design and licensing information for the model facility. The three major subcontracts for soils and structural design, rack design, and the security system design are progressing satisfactorily. Design modification work at AGNS is near completion. Licensing documentation is approximately 50% complete and progressing at a satisfactory pace to meet scheduled projections.
Date: July 25, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Analysis of multipass laser amplifier systems for storage laser media (open access)

Analysis of multipass laser amplifier systems for storage laser media

The performance characteristics of single pass and multipass storage laser amplifiers are presented and compared. The effects of the multipass amplifier parameters on the extraction characteristics are examined. For a wide range of conditions the multipass amplifier is found to provide high energy gain and high efficiency simultaneously. This is a significant advantage over the single pass laser amplifier. Finally, three specific storage laser amplifier systems, flashlamp pumped V:MgF/sub 2/, XeF laser pumped Tm:Glass, and photolytically pumped Selenium, are examined. The performance characteristics for each of the three systems are calculated and compared.
Date: March 25, 1980
Creator: Harvey, James F.
Object Type: Article
System: The UNT Digital Library
Angular measurements in optical testing (open access)

Angular measurements in optical testing

The measurement of angles plays an important role in practically every discipline of optics, including prism manufacture, optical assembly and alignment. It is the purpose of this paper to review some of the angle measurement techniques and how they are used in optical testing.
Date: September 25, 1980
Creator: Thomas, N.L.
Object Type: Article
System: The UNT Digital Library
Assessment of the potential of colloidal fuels in future energy usage. Final report. [97 references] (open access)

Assessment of the potential of colloidal fuels in future energy usage. Final report. [97 references]

Pulverized coal has been an increasing important source of energy over the past century. Most large utility boilers, all modern coking plants, and many industrial boilers and blast furnaces employ pulverized coal as a major feed stream. In periods of oil shortages, such as during World Wars I and II, the concept of adding powdered coal to oil for use in combustion equipment originally designed for oil has been actively pursued but rarely used. Over this same period of time, there have been attempts to use air suspensions of coal dust in diesel engines in Germany, and in turbines in various countries. The economic advantages to be enjoyed by substitution of powdered coal in oil are not generally realized. Oil costs at $30/bbl represent a fuel value of about $5.00/10/sup 6/ Btu; coal at $25/ton is equivalent to approximately $1.00/10/sup 6/ Btu. Although capital costs for the use of coal are higher than those associated with the use of oil, coal is clearly becoming the least costly fuel. Not only are considerable cost advantages possible, but an improvement in balance of payments and an increase in reliability of fuel supplies are other potential benefits. It is therefore recommended that increased …
Date: February 25, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Capacity-expansion planning under uncertainty in the electric-utility industry (open access)

Capacity-expansion planning under uncertainty in the electric-utility industry

This document basically represents a comparison between theory and practice of capacity-expansion planning in the electric-utility industry. The purpose of the comparison is to provide avenues for further exploration in utility decision making. The focus of the Phase II study is upon the role of uncertainty in the decision-making process. The Phase I effort was directed at modeling the Averch-Johnson theory of the regulated utility. Part I of this report reviews the Anderson study (D. Anderson, Models for Determining Least-Cost Investments in Electricity Supply). The Anderson paper has become a standard reference for capacity-planning studies in the electric-utility industry. Part II examines uncertainty and the behavior of the firm. Part III reviews 5 models of electric-utility capacity planning under uncertainty, and Part IV is concerned with capacity-planning models in practice.
Date: July 25, 1980
Creator: Soyster, A.L.
Object Type: Report
System: The UNT Digital Library
Clean Air Act: An Overview Issue Brief Number IB80078 (open access)

Clean Air Act: An Overview Issue Brief Number IB80078

This report is about the Clean Air Act: An Overview Issue Brief Number IB800787
Date: July 25, 1980
Creator: Grimes Maria
Object Type: Report
System: The UNT Digital Library
Development of software for computer assisted model simplification. Final report. [Lagrange multipliers] (open access)

Development of software for computer assisted model simplification. Final report. [Lagrange multipliers]

The final report of DBS Corporation on the model simplification project is presented. The purpose of the project is to develop computer-assisted model simplification. The contributions of DBS to this project where an initial overall project assessment, contributions to design principles and testing procedures, specific experimental designs, and initial test results. The main contributions of DBS to this project were in the area of LP matrix scaling, and particularly in the potential usefulness of shadow price information for model simplification. An algorithm for obtaining approximate shadow price information was developed and subjected to initial small-scale testing with promising results.
Date: April 25, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Energy efficient buildings. Technical potentials and policy recommendations for conservation and renewable resources: a least cost scenario, 1980-2000 (open access)

Energy efficient buildings. Technical potentials and policy recommendations for conservation and renewable resources: a least cost scenario, 1980-2000

Working from the premise that the largest and least expensive source of energy in the US in the next 20 y is the energy that could be saved in buildings, building energy consumption in commercial and residential buildings is examined, and the energy savings which could be accomplished by more efficient building design, by energy conserving retrofits and by the use of solar heating equipment are discussed. (LCL)
Date: July 25, 1980
Creator: Rosenfeld; Goldstein; Harris; Claridge & Gawell
Object Type: Report
System: The UNT Digital Library
Environmental monitoring at the Lawrence Livermore Laboratory. 1979 annual report (open access)

Environmental monitoring at the Lawrence Livermore Laboratory. 1979 annual report

Information on monitoring activities is reported in two sections for EDB/ERA/INIS. The first section covers all information reported except Appendix D, which gives details of sampling and analytical procedures for environmental monitoring used at Lawrence Livermore Laboratory. A separate abstract was prepared for Appendix D. (JGB)
Date: April 25, 1980
Creator: Silver, W. J.; Lindeken, C. L.; White, J. H. & Buddemeir, R. W.
Object Type: Report
System: The UNT Digital Library
Evaluation and demonstration of methods for improved fuel utilization. First semi-annual progress report, September 1979-March 1980 (open access)

Evaluation and demonstration of methods for improved fuel utilization. First semi-annual progress report, September 1979-March 1980

Demonstrations of improved fuel management and burnup are being performed in the Fort Calhoun reactor. More efficient fuel management will be achieved through the implementation of a low leakage concept called SAVFUEL (Shimmed And Very Flexible Uranium Element Loading), which is expected to reduce uranium requirements by 2 to 4%. The burnup will be increased sufficiently to reduce uranium requirements by 5 to 15%. Four fuel assemblies scheduled to demonstrate the SAVFUEL duty cycle and loaded into the core in December 1978 were inspected visually prior to their second exposure cycle. In addition, seventeen fuel assemblies were inspected after their fourth exposure cycle having achieved assembly average burnup up to 36 GWD/T. One assembly has been reinserted into Cycle 6 for a fifth exposure cycle. The preliminary results of all visual fuel inspections which appear to show excellent fuel rod performance are presented in this report. This report also contains the results of a licensing activity which was performed to allow insertion of a highly burned assembly into the reactor for a fifth irradiation cycle.
Date: June 25, 1980
Creator: Decher, U.
Object Type: Report
System: The UNT Digital Library
Evaluation of cracking in feedwater piping adjacent to the steam generators in Nine Pressurized Water Reactor Plants (open access)

Evaluation of cracking in feedwater piping adjacent to the steam generators in Nine Pressurized Water Reactor Plants

Cracking in ASTM A106-B and A106-C feedwater piping was detected near the inlet to the steam generators in a number of pressurized water reactor plants. We received sections with cracks from nine of the plants with the objective of identifying the cracking mechanism and assessing various factors that might contribute to this cracking. Variations were observed in piping surface irregularities, corrosion-product, pit, and crack morphology, surface elmental and crystal structure analyses, and steel microstructures and mechanical properties. However, with but two exceptions, namely, arrest bands and major surface irregularities, we were unable to relate the extent of cracking to any of these factors. Tensile and fracture toughness (J/sub Ic/ and tearing modulus) properties were measured over a range of temperatures and strain rates. No unusual properties or microstructures were observed that could be related to the cracking problem. All crack surfaces contained thick oxide deposits and showed evidence of cyclic events in the form of arrest bands. Transmission electron microscopy revealed fatigue striations on replicas of cleaned crack surfaces from one plant and possibly from three others. Calculations based on the observed striation spacings gave a value of ..delta..sigma = 150 MPa (22 ksi) for one of the major cracks. …
Date: June 25, 1980
Creator: Goldberg, A.; Streit, R. D. & Scott, R. G.
Object Type: Report
System: The UNT Digital Library
Fire protection countermeasures for containment ventilation systems (open access)

Fire protection countermeasures for containment ventilation systems

The goal of this project is to find countermeasures to protect High Efficiency Particulate Air (HEPA) filters, in exit ventilation ducts, from the heat and smoke generated by fire. Initially, methods were developed to cool fire-heated air by fine water spray upstream of the filters. It was recognized that smoke aerosol exposure to HEPA filters could also cause disruption of the containment system. Through testing and analysis, several methods to partially mitigate the smoke exposure to the HEPA filters were identified. A continuous, movable, high-efficiency prefilter using modified commercial equipment was designed. The technique is capable of protecting HEPA filters over the total time duration of the test fires. The reason for success involved the modification of the prefiltration media. Commercially available filter media has particle sorption efficiency that is inversely proportional to media strength. To achieve properties of both efficiency and strength, rolling filter media were laminated with the desired properties. The approach was Edisonian, but truncation in short order to a combination of prefilters was effective. The application of this technique was qualified, since it is of use only to protect HEPA filters from fire-generated smoke aerosols. It is not believed that this technique is cost effective in …
Date: August 25, 1980
Creator: Alvares, N.; Beason, D.; Bergman, V.; Creighton, J.; Ford, H. & Lipska, A.
Object Type: Report
System: The UNT Digital Library
Holding down the food stamp budget: 1980 Legislation (open access)

Holding down the food stamp budget: 1980 Legislation

This report is about the food stamp budget.
Date: July 25, 1980
Creator: Joe, Bichardson
Object Type: Report
System: The UNT Digital Library
Kinetics and Mechanisms of Catalytic Hydroliquefaction and Hydrogasification of Lignite. Quarterly Report, April-June 1980 (open access)

Kinetics and Mechanisms of Catalytic Hydroliquefaction and Hydrogasification of Lignite. Quarterly Report, April-June 1980

Progress is reported in the research project aimed at investigation of the basic chemical kinetics and mechanisms in catalytic hydrogenation of lignite suspended in a carrier oil in a continuous reactor operating at steady state. Specifically, the research is designed to study the overall conversion rate and the elemental transformation from the raw materials into products under surface reaction cntrolling conditions and to postulate the reaction mechanisms of hydroliquefaction and hydrogasification of lignite based upon the results obtained. A delay of six months in the delivery of a new slurry pump has prevented extension of the range of available residence times in the continuous stirred tank reactor. A quick-feed mechanism installed on the batch autoclave permits more accurate determination of running times at constant temperature. A detailed study of decomposition of carrier oil (anthracene oil) sowed that gasification of the oil was considerably greater at high temperatures than previously expected. Future runs will be limited to conditions under which the carrier oil loss is a relatively small fraction of the oil generated from lignite.
Date: September 25, 1980
Creator: Weiss, A. H.; Kranich, W. L. & Gueruez, K.
Object Type: Report
System: The UNT Digital Library
Lawrence Livermore Laboratory's Beryllium Control Program for High-Explosive Test Firing Bunkers and Tables (open access)

Lawrence Livermore Laboratory's Beryllium Control Program for High-Explosive Test Firing Bunkers and Tables

This report on the control program to minimize beryllium levels in Laboratory workplaces includes an outline of beryllium surface, soil, and air levels and an 11-y summary of sampling results from two high-use, high-explosive test firing bunkers. These sampling data and other studies demonstrate that the beryllium control program is functioning effectively.
Date: November 25, 1980
Creator: Johnson, J. S.
Object Type: Report
System: The UNT Digital Library
Negative deuterium ions for tandem mirror next step and tandem mirror reactors (open access)

Negative deuterium ions for tandem mirror next step and tandem mirror reactors

Recent designs for mirror fusion reactors with good power balance include ambipolar potential plugs to reduce end losses and thermal barriers to maintain a difference in electron temperature between the large-volume central cell plasma and the confining end plugs. These designs led to several new requirements for D/sup 0/ neutral beams derived from negative ions at energies of 150 to 200 keV and possibly higher. Such beams are required for injection of fat ions into the plugs and the barrier and for charge-exchange pumping of thermal ions diffusing into the barrier. Negative ions are preferred for these purposes because of their relatively high efficiency of neutralization and their high purity of single-energy D/sup -/. Examples of injector designs for Tandem Mirror Next Step (TMNS) and Tandem Mirror Reactors (TMR) are presented.
Date: September 25, 1980
Creator: Hamilton, G.W.
Object Type: Article
System: The UNT Digital Library
Presidential emergency powers over domestic affairs. 1980 (open access)

Presidential emergency powers over domestic affairs. 1980

This report will analyse the authority of the Chief Executive to declare a state of emergency, and will then discuss some of the more significant actions that the President may take under these conditions.
Date: September 25, 1980
Creator: Raymond, Natter
Object Type: Report
System: The UNT Digital Library
Procedures for safe handling of off-gases from electric vehicle lead-acid batteries during overcharge (open access)

Procedures for safe handling of off-gases from electric vehicle lead-acid batteries during overcharge

The potential for generation of toxic gases from lead-acid batteries has long been recognized. Prior to the current interest in electric vehicles, there were no studies specificaly oriented to toxic gas release from traction batteries, however. As the Department of Energy Demonstration Project (in the Electric and Hybrid Vehicle Program) progresses, available data from past studies and parallel health effects programs must be digested into guidance to the drivers and maintenance personnel, tailored to their contact with electric vehicles. The basic aspects of lead-acid battery operation, vehicle use, and health effects of stibine and arsine to provide electric vehicle users with the information behind the judgment that vehicle operation and testing may proceed are presented. Specifically, it is concluded that stibine generation or arsine generation at rapid enough rates to induce acute toxic response is not at all likely. Procedures to guard against low-level exposure until more definitive data on ambient concentrations of the gases are collected are presented for both charging the batteries and driving the vehicles. A research plan to collect additional quantitative data from electric traction batteries is presented.
Date: January 25, 1980
Creator: LaBelle, S.J.; Bhattacharyya, M.H.; Loutfy, R.O. & Varma, R.
Object Type: Report
System: The UNT Digital Library