21 Matching Results

Search Results

Results: 1 - 21
open access

D0 Cryo System Control System Autodialer

Description: The DO cryogenic system is controlled by a TI565-PLC based control system. This allows the system to be unmanned when in steady state operation. System experts will need to be contacted when system parameters exceed normal operating points and reach alarm setpoints. The labwide FIRUS system provides one alarm monitor and communication link. An autodialer provides a second and more flexible alarm monitor and communication link. The autodialer monitors contact points in the control system and aft… more
Date: April 17, 1990
Creator: Urbin, J.
Partner: UNT Libraries Government Documents Department
open access

Thermally Induced Structural Changes in Coal Combustion

Description: The effect of particle shape on char burnout is investigated in the limit of shrinking core combustion. As a first step, the particle temperature is assumed to proceed in the shrinking core regime and under conditions of negligible Stefan flow. The problem then reduces to calculating the oxygen concentration field around a non-spherical particle with the oxidation reaction taking place on the external surface. This problem has been addressed by an analytical technique and a numerical technique.… more
Date: January 17, 1990
Creator: Gavalas, G. R. & Flagan, R. C.
Partner: UNT Libraries Government Documents Department
open access

Development of improved iron Fischer-Tropsch catalysts

Description: The objective of proposed research is development of catalysts with enhanced slurry phase activity and better selectivity to fuel range products, through a more detailed understanding and systematic studies of the effects of pretreatment procedures and promoters/binders (silica) on catalyst performance.
Date: June 17, 1990
Creator: Bukur, D.B.
Partner: UNT Libraries Government Documents Department
open access

Control of pyrite surface chemistry in physical coal cleaning

Description: To better understand the flotation behavior of coal pyrite, studies have been initiated to characterize the floatability of coal pyrite and mineral pyrite. The hydrophobicity of coal material pyrite was examined over a range of pH and oxidation times. The results indicate that surface oxidation plays an important role in coal and mineral pyrite hydrophobicity. The hydrophobicity of mineral pyrite decreases with increasing oxidation time (20 min. to 5 hr.) and increasing pH (pH 4.6 to 9.2), with… more
Date: January 17, 1990
Creator: Luttrell, G. H.; Yoon, R. H.; Zachwieja, J. & Lagno, M.
Partner: UNT Libraries Government Documents Department
open access

Synchrotron radiation power calculations and bending radius choice for LER (Low Energy Ring)

Description: This note will discuss ways of choosing a bending radius and synchrotron radiation absorber design. We would like to decrease the synchrotron radiation power density on the absorber's surfaces, yet we would like to reduce the LER's bending radius for better matching with the HER (beam-beam interaction criteria). We will consider two cases, both based on the PEP structure. One with 96 periods, containing 1 bending magnet per period and the other 2 bends per period. The case of synchrotron radiat… more
Date: August 17, 1990
Creator: Alexandrov, A.; Hutton, A. & Logatchev, P.
Partner: UNT Libraries Government Documents Department
open access

(Instrumentation and controls technology and reactor operational safety)

Description: While on vacation, the traveler participated as a co-chairman of a panel of instrumentation and controls specialists visiting nuclear establishments in Europe. The purpose of the visit was to assess the status of instrumentation and controls technology for nuclear power in Europe. A list of the sites visited and the personnel contacted is included in this trip report. The visit was sponsored by Loyola College working under contract to the National Science Foundation. All costs were paid by Loyo… more
Date: December 17, 1990
Creator: White, J.D.
Partner: UNT Libraries Government Documents Department
open access

Electric power monthly, September 1990. [Glossary included]

Description: The purpose of this report is to provide energy decision makers with accurate and timely information that may be used in forming various perspectives on electric issues. The power plants considered include coal, petroleum, natural gas, hydroelectric, and nuclear power plants. Data are presented for power generation, fuel consumption, fuel receipts and cost, sales of electricity, and unusual occurrences at power plants. Data are compared at the national, Census division, and state levels. 4 figs… more
Date: December 17, 1990
Partner: UNT Libraries Government Documents Department
open access

Millimeter-wave, megawatt gyrotron development for ECR (electron cyclotron resonance) heating applications

Description: To address the electron cyclotron heating requirements of planned fusion experiments such as the International Thermonuclear Experimental Reactor (ITER) and the Compact Ignition Tokamak (CIT), Varian is developing gyrotrons at frequencies ranging from 100--300 GHz with output power capabilities up to 1 MW CW. Experimental gyrotrons have been built at frequencies between 100--140 GHz, and a study program has addressed the critical elements of designing 280--300 GHz gyrotrons capable of generatin… more
Date: September 17, 1990
Creator: Jory, H.; Felch, K.; Hess, C.; Huey, H.; Jongewaard, E.; Neilson, J. et al.
Partner: UNT Libraries Government Documents Department
open access

Coal distribution, January--June 1990

Description: The Coal Distribution report provides information on coal production, distribution, and stocks in the United States to a wide audience including Congress, federal and state agencies, the coal industry, and the general public. This issue presents information for January through June 1990. Coal distribution data are shown (in tables 1--34) by coal-producing state of origin, consumer use, method of transportation, and state of destination. 6 figs., 34 tabs.
Date: October 17, 1990
Partner: UNT Libraries Government Documents Department
open access

Simultaneous particulates, NO sub x , SO sub x removal from flue gas by all solid-state electrochemical technology

Description: The process control SO{sub x}, NO{sub x}, and particulate emission from coal combustion flue gases. It is based on a solid-state, electrochemical reactor which converts NO{sub x} and SO{sub 2} to nitrogen, sulfur, and oxygen. Sulfur is condensed downstream at a lower temperature. Particulates are removed with a filter or electrostatic precipitator. The process utilizes no other material input (flue gas is the only fluid), has no moving parts, and produces no sludge(s). The reactor consists of a… more
Date: April 17, 1990
Creator: Cook, W.J.; Cornell, L.P.; Keyvani, M.; Neyman, M. (Helipump Corp., Cleveland, OH (USA)) & Helfritch, D.J. (Research-Cottrell, Inc., Somerville, NJ (USA). Environmental Services and Technologies Div.)
Partner: UNT Libraries Government Documents Department
open access

Manufactured Homes Simulated Thermal Analysis and Cost Effectiveness Report.

Description: In 1988 and 1989, 150 manufactured homes were built to comply with Super Good Cents (SGC) specifications adapted from the existing specifications for site-built homes under the Residential Construction Demonstration Project (RCDP). Engineering calculations and computer simulations were used to estimate the effects of the SGC specifications on the thermal performance of the homes. These results were compared with consumer costs to establish the cost-effectiveness of individual measures. Heat los… more
Date: May 17, 1990
Creator: Baylon, David
Partner: UNT Libraries Government Documents Department
open access

Low severity coal conversion by ionic hydrogenation

Description: The work accomplished in this project will be reported in two parts. Part one will focus on the development of catalytic ionic hydrogenation reactions utilizing a transition metal-H{sub 2} complex as the hydride donor and BF{sub 3}:H{sub 2}O as proton donor. This part reports the results of prelimiary work leading to the development of a new catalytic ionic hydrogenation system (MeCN){sub 2}PtCl{sub 2}/H{sub 2}/BF{sub 3}: H{sub 2}O. The results from some of this work have been published and the… more
Date: August 17, 1990
Creator: Larsen, J. W.; Maioriello, J. & Cheng, J. C.
Partner: UNT Libraries Government Documents Department
open access

(Biological dosimetry)

Description: The traveler attended the 1st International Conference on Biological Dosimetry in Madrid, Spain. This conference was organized to provide information to a general audience of biologists, physicists, radiotherapists, industrial hygiene personnel and individuals from related fields on the current ability of cytogenetic analysis to provide estimates of radiation dose in cases of occupational or environmental exposure. There is a growing interest in Spain in biological dosimetry because of the incr… more
Date: December 17, 1990
Creator: Preston, R. J.
Partner: UNT Libraries Government Documents Department
open access

(Automation in the clinical laboratory and drug testing programs in the workplace)

Description: The traveler chaired a session on Laboratory Robotics at 4th International Congress on Automation in the Clinical Laboratory. In addition, the traveler chaired a session on Drugs-of-Abuse at 2nd International Congress of Therapeutic Drug Monitoring and Toxicology. In this session, the traveler also presented a paper entitled Development, Implementation and Management of a Drug Testing Program in the Workplace.'' These two Congress were run concurrently in the Congress Center in Barcelona, Spain. more
Date: October 17, 1990
Creator: Burtis, Carl
Partner: UNT Libraries Government Documents Department
open access

North RTL grid scan'' studies

Description: This study was made in response to screen measurements which indicated an emittance growth of nearly a factor of two within the North RTL or linac girder-1. Betatron oscillations are induced at the beginning of the North RTL to search for gross geometric aberrations arising within the RTL or sector-2 of the linac. The oscillations are induced horizontally and vertically with two X or two Y dipole correctors stepped in a nested loop fashion. In both cases the full set of RTL and first girder sec… more
Date: October 17, 1990
Creator: Emma, P.
Partner: UNT Libraries Government Documents Department
open access

(Energy Efficiency of the Computerized Utilities Energy Monitor and Control System)

Description: The travelers, representing the ORNL Energy Division, Efficiency and Renewables Research Section, conducted an in-depth evaluation of the CUMACS/EMCS installed at the 26th Support Group, USAREUR. This endeavor included an evaluation of the overall performance of this system including operations maintenance and end-user impact. System energy efficiency in terms of projected and actual energy and cost savings were analyzed. Conclusions and preliminary recommendations based on this evaluation were… more
Date: December 17, 1990
Creator: Broders, M. A. & McConnell, B. W.
Partner: UNT Libraries Government Documents Department
open access

Diagnostic probes for particle and molecule distributions in laser-generated plumes

Description: Laser microprobe analysis (LMA) offers good spatial and depth resolution for solid sampling of virtually any material. Coupled with numerous optical spectroscopic and mass spectrometric detection methods, LMA is a powerful analytical tool. Yet, fundamental understanding of the interaction between the laser and the sample surface leading to the formation of the high temperature plasma (plume) is far from complete. To better understand the process of plume formation, an imaging method based on ac… more
Date: October 17, 1990
Creator: Kimbrell, S.M.
Partner: UNT Libraries Government Documents Department
open access

(The 25th international conference on high-energy physics at Singapore)

Description: The traveler attended the 25th International Conference on High-Energy Physics in Singapore, August 1--8, 1990. The conference was dominated by results from the new LEP accelerator at CERN. The precision of the data from LEP is impressive, and all results are consistent with the standard model. No new physics'' has emerged at LEP. The traveler presented a talk on CERN/SPS WA80 results and had several interesting, private discussions on both L* and WA80 topics.
Date: August 17, 1990
Creator: Plasil, F.
Partner: UNT Libraries Government Documents Department
open access

Control of pyrite surface chemistry in physical coal cleaning. First quarterly progress report, September 1, 1989--November 30, 1989

Description: To better understand the flotation behavior of coal pyrite, studies have been initiated to characterize the floatability of coal pyrite and mineral pyrite. The hydrophobicity of coal material pyrite was examined over a range of pH and oxidation times. The results indicate that surface oxidation plays an important role in coal and mineral pyrite hydrophobicity. The hydrophobicity of mineral pyrite decreases with increasing oxidation time (20 min. to 5 hr.) and increasing pH (pH 4.6 to 9.2), with… more
Date: January 17, 1990
Creator: Luttrell, G. H.; Yoon, R. H.; Zachwieja, J. & Lagno, M.
Partner: UNT Libraries Government Documents Department
open access

Development of improved iron Fischer-Tropsch catalysts. Quarterly technical progress report, 1 April 1990--30 June 1990

Description: The objective of proposed research is development of catalysts with enhanced slurry phase activity and better selectivity to fuel range products, through a more detailed understanding and systematic studies of the effects of pretreatment procedures and promoters/binders (silica) on catalyst performance.
Date: June 17, 1990
Creator: Bukur, D. B.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen