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Coal Technology Program. Progress report for November 1977

Description: A block of Pittsburgh seam bituminous coal and a block of Wyodak subbituminous coal were pyrolyzed under reducing gas in support of in situ gasification. Information from previously completed block pyrolysis of bituminous coal under an argon atmosphere show that differences in evolved gas result from differences in heating rates. Compared to block pyrolysis at 0.3 C/sup 0//min, block pyrolysis at 3 C/sup 0//min produces less gas but gas with a higher heating value, yielding a higher overall pyr… more
Date: January 1, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Recycled used fluorescent light tube solar water heater. Final technical report

Description: A project to investigate methods that might be used to utilize old fluorescent light tubes as solar water heater components then to produce a booklet of instructions for others to use to construct their own water heaters is described. Various methods of opening, cleaning and shaping the ends of the tubes were attempted. The reflective material needed inside some of the heaters was mylar and worked quite well but the Btu gain was disappointing. There were problems with the cement used and epoxy … more
Date: January 1, 1979
Creator: Jaquette, F M
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Low strain diameter expansion of internally pressurized Zircaloy-4 tubing at high temperatures

Description: Tests of closed-end, internally pressurized, Zircaloy-4 tubing specimens were utilized to develop low strain creep characteristics as a function of time at temperatures in the range of 1475/sup 0/F to 2000/sup 0/F (802/sup 0/C to 1093/sup 0/C) and hoop stresses in the range of 250 to 2500 psi for use in loss-of-coolant accident (LOCA) analyses. The strain rate above the start of the alpha to beta phase transformation region, approximately 1490/sup 0/F (810/sup 0/C), was found to be sensitive to… more
Date: March 1978
Creator: White, L.S. & Busby, C.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High temperature recuperator tests. Final report

Description: A demonstration and test program was conducted on a high temperature, two pass ceramic tube recuperator. Data pertaining to heat exchanger performance characteristics were collected and compared with calculated values. The effect of improved heat exchanger effectiveness on system fuel consumption was demonstrated. Changes in fuel flow as a function of combustion air preheat while maintaining a given heat load were demonstrated. The effects of excess air on fuel consumption with and without syst… more
Date: May 1, 1980
Creator: Bjerklie, J. W. & Penty, R. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dynamic shear behavior of alumina-filled epoxy

Description: Thin-walled tubular specimens of alumina-filled epoxy were loaded in torsion at a strain rate of approximately 10/sup 3/ s/sup -1/ using a stored-torque Kolsky bar. In addition to measuring the time resolved shear stress and shear strain in the specimen, the axial stress generated by the dilation of the material during shear deformation was also obtained as a function of time. Tests were conducted at room temperature and at -60/sup 0/C. At room temperature, a moderate amount of plastic deformat… more
Date: March 1, 1982
Creator: Costin, L.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Flow instability in a vertical annulus under steady state and transient conditions

Description: Experimental data have been obtained for the occurrence of flow instability in a vertical annulus under steady state and transient down-flow conditions. The results show that the primary factor affecting the onset of flow instability is the Q{sub ratio} parameter (a measure of the void production in a channel). In addition, it is shown that for steady state conditions good agreement exists between the single annulus data and single tube data based upon the same L/D ratio. The results also indic… more
Date: January 1, 1992
Creator: Fighetti, C.; Kokolis, S.; Maciuca, C.; Reddy, D.G.; Yang, B.; Carrano, V. (Columbia Univ., New York, NY (United States)) et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Shippingport Atomic Power Station steam generator tube damage and water chemistry control (1965--1975)

Description: The four stainless steel tubed steam generators in the Shippingport Atomic Power Station were replaced in 1964 with larger, horizontal, NiCrFe Alloy 600 tubed units consistent with a power uprating of the plant. Each of the four Alloy 600 tubed units experienced tube leakage attributed to corrosion by water treatment chemicals (sodium phosphates) which concentrated locally on the tubes in inadequately flushed crevices. Corrective and preventive actions include tube plugging, flow blockage, conv… more
Date: January 1978
Creator: Singley, W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Susceptibility of unirradiated recrystallized Zircaloy-4 tubing to stress corrosion cracking

Description: Stress corrosion cracking (SCC) in unirradiated recrystallized Zircaloy-4 internally pressurized tubing specimens in atmospheres containing iodine vapor, cesium, or combinations of iodine and cesium is evaluated experimentally in terms of the effects of internal surface flaw morphology, iodine and cesium concentrations, tubing hydrogen content, test temperature, and test atmosphere water vapor content on the time to failure. The iodine vapor SCC data are analyzed in the framework of a fracture … more
Date: December 1977
Creator: Polan, N. W. & Tucker, R. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Flow Induced Vibration Program at Argonne National Laboratory

Description: Argonne National Laboratory has had a Flow Induced Vibration Program since 1967; the Program currently resides in the Laboratory's Components Technology Division. Throughout its existence, the overall objective of the program has been to develop and apply new and/or improved methods of analysis and testing for the design evaluation of nuclear reactor plant components and heat exchange equipment from the standpoint of flow induced vibration. Historically, the majority of the program activities h… more
Date: January 1, 1984
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ocean thermal energy conversion (OTEC) power system development. Preliminary design report, Appendices, Part 1 (Final)

Description: The objective of this project is the development of a preliminary design for a full-sized, closed cycle, ammonia power system module for the 100 MWe OTEC demonstration plant. In turn, this demonstration plant is to demonstrate, by 1984, the operation and performance of an Ocean Thermal Power Plant having sufficiently advanced heat exchanger design to project economic viability for commercial utilization in the late 1980's and beyond. Included in this power system development are the preliminary… more
Date: December 4, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Steam generator secondary pH during a steam generator tube rupture

Description: The Nuclear Regulatory Commission requires utilizes to determine the response of a pressurized water reactor to a steam generator tube rupture (SGTR) as part of the safety analysis for the plant. The SGTR analysis includes assumptions regarding the partitioning of iodine between liquid and vapor in steam generator secondary. Experimental studies have determined that the partitioning of iodine in water is very sensitive to the pH. Based on this experimental evidence, the NRC requested the INEL t… more
Date: December 1, 1991
Creator: Adams, J. P. & Peterson, E. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Steam Generator Group Project. Progress report on data acquisition/statistical analysis

Description: A major task of the Steam Generator Group Project (SGGP) is to establish the reliability of the eddy current inservice inspections of PWR steam generator tubing, by comparing the eddy current data to the actual physical condition of the tubes via destructive analyses. This report describes the plans for the computer systems needed to acquire, store and analyze the diverse data to be collected during the project. The real-time acquisition of the baseline eddy current inspection data will be hand… more
Date: January 1, 1984
Creator: Doctor, P. G.; Buchanan, J. A.; McIntyre, J. M.; Hof, P. J. & Ercanbrack, S. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Theoretical study of the tube flow of one component sticky foam solutions. [As access deterrents in Safeguard program]

Description: A theoretical model describing the flow of a solution that foams during tube flow was developed. The larger viscosity and smaller density of the foam phase relative to the original solution are responsible for the large resistance to flow that occurs when foaming takes place. The experimental observations of P.B. Rand and K.C. Goettsche that describe a maximum in flow rate as the temperature is increased are explained by the model. The temperature-dependence of the Freon 12 vapor pressure cause… more
Date: April 1, 1977
Creator: Kraynik, A.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Errors in measuring level and density with purged dip tubes

Description: Measurement of liquid level and density and dip-tube sensors was evaluated by analysis and experiment. A model was developed to predict the characteristic error caused by the purge-gas bubble (dip-tube bias). Experimental results are presented to support these predictions and are also compared with data reported in the literature. It was shown that properly designed and calibrated dip tubes do not make significant contributions to the error in dip-tube level and density-measurement systems.
Date: November 1, 1977
Creator: Bradley, N.C.; Murray, W.P. & Googe, J.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reptation and viscosity in marginal solvents

Description: Understanding of the complex molecular motions of entangled polymers in solution is essential by the concepts of hydrodynamic screening and reptation. Marginal systems are these in which excluded-volume-induced swelling of chains is too weak to allow the use of scaling laws. Purpose of this paper is to extend the Schaefer-Joanny-Pincus scheme to reptation-based quantities. Consequences of the model for viscosity and other measurables are tabulated. (DLC)
Date: January 1, 1982
Creator: Schaefer, D.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Coal Technology Program. Progress report for December 1977

Description: In the pressure vessel and piping materials work, the report, ''Assessment of Materials Technology for Gasifer and Reaction Pressure Vessels and Piping for Second Generation Commercial Coal Conversion Systems'' (ORNL-5238), has been submitted for publication and distribution. Impact and tensile teting is under way on 2/sup 1///sub 4/ cr-1 Mo steel which has received a simulated quench, temper, and postweld heat treatment. Two topical reports on coating inspection have gone to reproduction. CoCr… more
Date: February 1, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Condensation film coefficients for mixtures of isobutane and isopentane

Description: Research designed to obtain baseline data on heat transfer for working fluids in geothermal binary cycle systems is described. The working fluid loop in the experimental apparatus simulates the binary cycle with steam as the heating fluid and a throttling valve instead of the turbine. Data on film coefficient for the condensation of 90/10 and 80/20 mixtures of isobutane-isopentane on a horizontal tube at various temperatures and condensation rates are presented. Data indicate that mixtures of i… more
Date: May 1, 1980
Creator: Tleimat, B.W.; Rie, H.; Laird, A.D.K. & Zhao, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Chaotic vibrations of nonlinearly supported tubes in crossflow

Description: By means of the unsteady-flow theory and a bilinear mathematical model, a theoretical study is presented for chaotic vibrations associated with the fluidelastic instability of nonlinearly supported tubes in a crossflow. Effective tools, including phase portraits, power spectral density, Poincare maps, Lyapunov exponent, fractal dimension, and bifurcation diagrams, are utilized to distinguish periodic and chaotic motions when the tubes vibrate in the instability region. The results show periodic… more
Date: February 1, 1992
Creator: Cai, Y. & Chen, S.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ferrules seals

Description: A device is provided for sealing an inner tube and an outer tube without excessively deforming the tubes. The device includes two ferrules which cooperate to form a vacuum-tight seal between the inner tube and outer tube and having mating surfaces such that overtightening is not possible.
Date: June 19, 1981
Creator: Smith, J.L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Coal technology program. Progress report, October 1977

Description: Two blocks of Pittsburgh seam bituminous coal were pyrolyzed under reducing gas in the project in support of in situ gasification. Higher heating rates appear to reduce swelling of the block during pyrolysis, and higher final pyrolysis temperature results in lower boiling tars. Three pressurized residue carbonization tests were completed at 1100/sup 0/F and 400 psi of methane with three feed materials. Work is in progress on the fracture toughness of thick sections of steels for piping and pres… more
Date: December 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Enhanced condensation heat transfer

Description: For the past four years, work has been in progress at ORNL to develop improved condensers for geothermal binary power cycles. The work has centered on optimizing the design variables associated with fluted surfaces on vertical tubes and comparing the tube performance with available enhanced tubes either for vertical or horizontal operation. Data with seven fluids including a hydrocarbon, fluorocarbons, and ammonia condensing on up to 30 different tubes have been obtained. Data for tubes of diff… more
Date: January 1, 1980
Creator: Michel, J. W. & Murphy, R. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Investigation of the cryogenic mechanical properties of low thermal-expansion superalloys

Description: Four Fe-based superalloys, JBK-75, Incoloy 903, Incoloy 905, and Incoloy 909 were evaluated as tube materials for ICCS Nb/sub 3/Sn superconductors. Evaluation consisted of 4-K tensile and elastic-plastic fracture-toughness testing, and a microstructural characterization of unwelded and autogenously gas-tungsten-arc welded sheet given a simulated postweld processing treatment of 15% cold reduction by rolling followed by a Nb/sub 3/Sn-reaction heat treatment of 96 hours at 700/sup 0/C plus 48 hou… more
Date: July 30, 1985
Creator: Summers, L.T. & Dalder, E.N.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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