71 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Extraction"  
Results: 1 - 24 next
open access

Extracted current densities from surface conversion sources of negative ions

Description: The condition for extracting a maximum negative ion current density is found when the product of the radius of the negative ion conversion electrode, the cross-section for negative and positive ion recombination, and the density of positive ions in the ion source equals one. The optimum output is obtained at the highest positive ion density and the smallest electrode radius.
Date: February 10, 1982
Creator: Fink, J.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

H5 fast-kicker-magnet pulser

Description: The fast extraction kicker magnet for the AGS is powered by a novel pulse generator. A pulse forming network (PFN) is discharged into nearly 100% mismatched load. The pulser delivers a current pulse of 3000 amperes peak pulse with a 2% flat-top ripple into a 1.4 ..mu.. H single turn ferrite core magnet. The pulse is 2.8 ..mu..sec wide with a 180 nsec rise time, at a 0.5 to 1.5 pps repetition rate. The pulse rise time is required to provide clean extraction of the 28 GeV proton beam by bringing … more
Date: January 1, 1982
Creator: Frey, W.; Ghoshroy, S. & Cottingham, J.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Consolidated fuel-reprocessing program. Progress report, April 1-June 30, 1982

Description: Highlights of progress accomplished during the quarter ending June 30, 1982 are summarized. Discussion is presented under the headings: Process development; Laboratory R and D; Engineering research; Engineering systems; Integrated equipment test facility operation; Instrument development; and HTGR fuel reprocessing.
Date: September 1, 1982
Creator: Burch, W D
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bibliography: injection technology applicable to geothermal utilization

Description: This bibliography cites 500 documents that may be helpful in planning, analysis, research, and development of the various aspects of injection technology in geothermal applications. These documents include results from government research; development, demonstration, and commercialization programs; selected references from the literature; symposia; references from various technical societies and installations; reference books; reviews; and other selected material. The cited references are from … more
Date: March 19, 1982
Creator: Darnell, A. J. & Eichelberger, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of process severity on physiochemical properties of preasphaltenes

Description: This paper describes the physical character and reactions of preasphaltenes made from a bituminous coal. The preasphaltenes were obtained by reacting Illinois No. 6 Burning Star coal in contact with SRC-II heavy distillate under hydrogen pressure in an Autoclave for various times (10 to 30 minutes) and temperatures (350 to 450/sup 0/C). The preasphaltenes were separated by using conventional Soxhlet extraction techniques. The primary question addressed was: Are preashaltenes produced under one … more
Date: January 1, 1982
Creator: Lynch, A. W. & Thomas, M. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Space heating for office building at Glenwood Springs, Colorado

Description: Technical assistance in a preliminary design and economic evaluation of a geothermal heating system was provided. The use of a downhole heat exchanger was evaluated, with the objective of reducing costs in this first stage of the project, but was abandoned. The low resource temperature and lack of sufficient aquifer data were the reasons for abandonment of the downhole heat exchanger concept. The use of surface plate heat exchangers was selected as the preferred approach for utilizing the geoth… more
Date: March 1, 1982
Creator: Garing, K.L. & Coury, G.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High-temperature borehole instrumentation

Description: Research in materials, equipment, and instrument development was required in the Hot Dry Rock Energy Extraction Demonstration at Fenton Hill located in northern New Mexico. The new Phase II Energy Extraction System at the Fenton Hill Test Site will consist of two wellbores drilled to a depth of about 4570 m (15,000 ft) and then connected by a series of hydraulic-induced fractures. The first borehole (EE-2) was completed in May of 1980, at a depth of 4633 m (15,200 ft) of which approximately 396… more
Date: January 1, 1982
Creator: Dennis, B.R.; Koczan, S. & Cruz, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Membrane-controlled processes for the energy-efficient conversion of sludges to fuels and marketable chemicals

Description: Studies were carried out on the concentration of primary and secondary sludges by ultrafiltration, and the operation of a membrane-assisted anaerobic digester to treat these sludges. Auxiliary devices including water-spilling and membrane solvent extraction were tested for their feasibility in the ehhancement of digester operations and the recovery of valuable byproducts. It was shown that membrane-facilitated digestion can increase the rate of these processes by a factor of ten, together with … more
Date: March 1, 1982
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Geothermal-Reservoir Well-Stimulation Program. Program status report

Description: Seven experimental fracture stimulation treatments completed to date and the laboratory work performed to develop the stimulation technology are described. A discussion of the pre-stimulation and post-stimulation data and their evaluation is provided for each experiment. Six of the seven stimulation experiments were at least technically successful in stimulating the wells. The two fracture treatments in East Mesa 58-30 more than doubled the producing rate of the previously marginal producer. Th… more
Date: May 1, 1982
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical characterization and genotoxic potential related to boiling point for fractionally distilled SRC-I coal liquids

Description: This report summarizes selected research efforts oriented toward ameliorating the genotoxic potential of direct coal liquefaction materials through modification or optimization of process conditions. The studies described were conducted to evaluate the utility of optimized distillation for coal liquids from the SRC-I process. SRC-I process solvent was distilled into 50/sup 0/F-range boiling point (bp) cuts. Analysis of amino-PAH (APAH) showed that mutagenic APAHs containing 3 or more rings were… more
Date: July 1, 1982
Creator: Wilson, B. W.; Pelroy, R. A. & Mahlum, D. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Potential for hot-dry-rock geothermal resources: experimental results

Description: Hot dry rock (HDR) contains insufficient permeability and fluid for natural hydrothermal development, but water pumped in a circulation loop through a HDR reservoir (hydraulically fractured between two drill holes) is being tested and evaluated. The formation of such in situ heat transfer systems, and subsequent testing of the man-made geothermal reservoirs in the Jemez volcanic field, New Mexico have already indicated the technical feasibility of the hot dry rock (HDR) geothermal concept. Docu… more
Date: January 1, 1982
Creator: Rowley, J.C.; Heiken, G.; Murphy, H.D. & Kuriyagawa, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Technological options for management of hazardous wastes from US Department of Energy facilities

Description: This report provides comprehensive information on the technological options for management of hazardous wastes generated at facilities owned or operated by the US Department of Energy (DOE). These facilities annually generate a large quantity of wastes that could be deemed hazardous under the Resource Conservation and Recovery Act (RCRA). Included in these wastes are liquids or solids containing polychlorinated biphenyls, pesticides, heavy metals, waste oils, spent solvents, acids, bases, carci… more
Date: August 1, 1982
Creator: Chiu, S.; Newsom, D.; Barisas, S.; Humphrey, J.; Fradkin, L. & Surles, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Heat rejection and energy extraction within solar ponds

Description: A study of the heat transfer and fluid flow processes governing heat rejection to the surface layer and energy extraction from the storage zone has been carried out. The literature available on this and other related problems was studied in detail to determine the nature of the recirculating flows that arise and the effect they might have on the stability of the gradient layer. Simplified analytical models were considered to determine the governing parameters and their effect on the performance… more
Date: February 1, 1982
Creator: Jaluria, Y.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Rock failure during massive hydraulic stimulation of the Baca location geothermal reservoir

Description: The analyses of microearthquake signals occurring during hydraulic stimulation provide an estimate of the size and location of the fractures thus produced. Studies of microearthquakes occurring during two large (> 10/sup 3/m/sup 3/) hydraulic stimulations of the hydrothermal reservoir at the Baca Location in the Jemez Mountains of northeastern New Mexico are reported. Both stimulations consisted of water, viscosity enhancer, and proppant. The microearthquake event rate was low but variable thro… more
Date: January 1, 1982
Creator: Pearson, C.; Keppler, H.; Albright, J. & Potter, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Seismological investigation of crack formation in hydraulic rock fracturing experiments and in natural geothermal environments. Progress report, September 1, 1981-August 31, 1982

Description: Accomplishments during the present reporting period are: high-quality digital data obtained in the crater and the flank of Mt. St. Helens by the deployment of 9 event-recorders; discovery of striking differences in arrival times and amplitudes of seismic events between the crater station and flank stations; successful interpretation of the above observations by a powerful new method of seismogram synthesis called Gaussian Beam Method; evidence obtained at Mt. St. Helens for a close connection b… more
Date: September 1, 1982
Creator: Aki, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solvent extraction of thorium from nitrate solutions by dibutyl butylphosphonate in Isopar H

Description: Solvent extraction of thorium by 30 vol % dibutyl butylphosphonate-70 vol % Isopar H from salted and nonsalted nitric acid solutions was studied. Thorium distribution coefficients D/sub Th/'s were obtained for nitric acid solutions of approx. 0.3 to approx. 12 N and for solutions of 1 and 2 M NH/sub 4/NO/sub 3/ over the HNO/sub 3/ concentration range of approx. 0.5 to approx. 9 N. The nitric acid solution D/sub Th/'s varied from approx. 4.3 at the lowest acidity, increased to a maximum of appro… more
Date: January 1, 1982
Creator: Freer, J.E.; Crump, D.H.; Axler, K.M.; Clifton, D.G.; S.W., Hayter & Mills, C.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Coprocessing solvent-extraction flowsheet studies for LWR and FBR fuels

Description: Coprocessing solvent extraction studies using irradiated LWR and FBR fuels have indicated the need for an efficient feed clarification. A potentially useful filtration method for fulfilling this need has been demonstrated. Conditions necessary for the satisfactory use of unstabilized hydroxylamine nitrate (HAN) or nitrous acid as the reducing agent for Pu(IV) during reductive stripping operations have been defined. Both partial partitioning and total costripping operations have been demonstrate… more
Date: January 1, 1982
Creator: Collins, E. D.; Benker, D. E.; Bigelow, J. E.; Chattin, F. R.; King, L. J.; Lloyd, M. H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Supercritical fluids for reaction and extraction of coal and heavy oils. Second quarterly progress report, December 1, 1981-February 28, 1982

Description: A program for the study of supercritical extraction of coal and coal liquids is being carried out. The purpose of this study is aimed at developing a fundamental understanding of critical extraction with emphasis on extraction of coal liquids with supercritical water and deashing of coal liquids, SRC-bottoms and possibly shale oils. The study will focus on the use of supercritical extraction techniques for extraction and fractionation of heavy residues which are often mixed with mineral matter … more
Date: March 1, 1982
Creator: Gopal, J. S.; Holder, G. D. & Deshpande, G. V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Time-dependent transmissivity of joints. Progress report, July 1, 1981-June 30, 1982

Description: When rock is subjected to a stress cycle during which cracks open and close, hysteresis is observed in the stress-strain curves, which has usually been attributed to friction. Scanning electron microscope studies, however, have shown that shear cracks are scarce in rock that has been deformed in the dilatant region. Stevens and Holcomb (1980) and Holcomb and Stevens (1980) have argued further that crack friction models are incompatible with the rheology of dilatant rock and are virtually untena… more
Date: February 1, 1982
Creator: Scholz, C. & Engelder, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Status of health and environmental research relative to direct coal liquefaction: 1976 to the present

Description: This document describes the status of health and environmental research efforts, supported by the US Department of Energy (DOE), to assist in the development of environmentally acceptable coal liquefaction processes. Four major direct coal liquefaction processes are currently in (or have been investigated at) the pilot plant stage of development. Two solvent refined coal processes (SRC-I and -II), H-coal (a catalytic liquefaction process) and Exxon donor solvent (EDS). The Pacific Northwest Lab… more
Date: June 1, 1982
Creator: Gray, R.H. & Cowser, K.E. (eds.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Low-pressure ion source

Description: A low pressure ion source for a neutron source comprises a filament cathode and an anode ring. Approximately 150V is applied between the cathode and the anode. Other electrodes, including a heat shield, a reflector and an aperture plate with a focus electrode, are placed at intermediate potentials. Electrons from the filament drawn out by the plasma and eventually removed by the anode are contained in a magnetic field created by a magnet ring. Ions are formed by electron impact with deuterium o… more
Date: October 27, 1982
Creator: Bacon, F.M.; Brainard, J.P.; O'Hagan, J.B. & Walko, R.J.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Progress of the US Hot-Dry-Rock Program

Description: While other geologic environments and possible heat-extraction methods are recognized, the US Hot Dry Rock (HDR) Program has so far concentrated on the use of hydraulic fracturing to create flow passages and heat-transfer surface between two wells drilled into hot crystalline rock of low initial permeability. A recirculating pressurized-water loop has been used at Fenton Hill, New Mexico, to extract heat at rates up to 5MW(t) from a system of this type in granitic rock at a depth of 2600 m. The… more
Date: January 1, 1982
Creator: Smith, M.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen