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Collector sealants and breathing. Final Report, 25 September 1978-31 December 1979

Description: The objectives of this program were: (1) to investigate the pertinent properties of a variety of possible sealants for solar collectors and identify the most promising candidates, and (2) to study the effect of breathing in flat-plate, thermal solar collector units. The study involved two types of sealants, Class PS which includes preformed seals or gaskets and Class SC which includes sealing compounds or caulks. It was the intent of the study to obtain data regarding initial properties of cand… more
Date: February 20, 1980
Creator: Mendelsohn, M A; Luck, R M; Yeoman, F A & Navish, Jr, F W
Partner: UNT Libraries Government Documents Department
open access

Strain hardening and ductility of iron: axisymmetric vs plane strain elongation. Technical progress report

Description: The strain hardening of iron at high strains in plane strain elongation (strip drawing) is shown to fall increasingly below that of drawn iron wires at true strains above 2, going through zero strain hardening at epsilon = 3.0, and becoming strongly negative thereafter, at least up to epsilon = 4.1. High resolution selected area electron diffraction has been used to map the size, shape and crystallographic orientations of a group of about 50 contiguous cells centered around an incipient shear b… more
Date: May 1, 1980
Creator: Langford, G.
Partner: UNT Libraries Government Documents Department
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ORNL irradiation creep facility

Description: A machine was developed at ORNL to measure the rates of elongation observed under irradiation in stressed materials. The source of radiation is a beam of 60 MeV alpha particles from the Oak Ridge Isochronous Cyclotron (ORIC). This choice allows experiments to be performed which simulate the effects of fast neutrons. A brief review of irradiation creep and experimental constraints associated with each measurement technique is given. Factors are presented which lead to the experimental choices ma… more
Date: September 1, 1980
Creator: Reiley, T. C.; Auble, R. L.; Beckers, R. M.; Bloom, E. E.; Duncan, M. G.; Saltmarsh, M. J. et al.
Partner: UNT Libraries Government Documents Department
open access

US/French Joint Research Program regarding the behavior of polymer base materials subjected to beta radiation. Volume 1. Phase-1 normalization results

Description: As part of the ongoing multi-year joint NRC/CEA international cooperative test program to investigate the dose-damage equivalence of gamma and beta radiation on polymer base materials, dosimetry and ethylene-propylene rubber (EPR) specimens were exchanged, irradiated, and evaluated for property changes at research facilities in the US (Sandia National Laboratories) and France (Compagnie ORIS Industrie). The purpose of this Phase-1 test series was to normalize and cross-correlate the results obt… more
Date: June 1, 1986
Creator: Wyant, F.J.; Buckalew, W.H.; Chenion, J.; Carlin, F.; Gaussens, G.; Le Tutour, P. et al.
Partner: UNT Libraries Government Documents Department
open access

Physical properties of Dowell Chemical Seal Ring

Description: This document outlines the tests, procedures, and results of an evaluation program for Dowell's Chemical Seal Ring.'' The testing reported here deals with the physical properties of density, compression, tensile strength, elongation, and a push-out/bond strength test. Dowell's Chemical Seal Ring'' is proposed as a gasket-like seal between grout layers in the annulus around the Exploratory Shaft steel liner. 4 refs., 1 fig., 4 tabs.
Date: July 1, 1985
Creator: Benny, H.L.
Partner: UNT Libraries Government Documents Department
open access

Regulating Intracellular Calcium in Plants: From Molecular Genetics to Physiology

Description: To grow, develop, adapt, and reproduce, plants have evolved mechanisms to regulate the uptake, translocation and sorting of calcium ions into different cells and subcellular compartments. Yet how plants accomplish this remarkable feat is still poorly understood. The spatial and temporal changes in intracellular [Ca2+] during growth and during responses to hormonal and environmental stimuli indicate that Ca2+ influx and efflux transporters are diverse and tightly regulated in plants. The specifi… more
Date: June 22, 2008
Creator: Sze, Heven
Partner: UNT Libraries Government Documents Department
open access

Effects of Plasma Shaping on Nonlinear Gyrokinetic Turbulence

Description: The effects of flux surface shape on the gyrokinetic stability and transport of tokamak plasmas are studied using the GS2 code [M. Kotschenreuther, G. Rewoldt, and W.M. Tang, Comput. Phys. Commun. 88, 128 (1995); W. Dorland, F. Jenko, M. Kotschenreuther, and B.N. Rogers, Phys. Rev. Lett. 85, 5579 (2000)]. Studies of the scaling of nonlinear turbulence with shaping parameters are performed using analytic equilibria based on interpolations of representative shapes of the Joint European Torus (JET… more
Date: August 19, 2008
Creator: E.A. Belli, G.W. Hammett and W. Dorland
Partner: UNT Libraries Government Documents Department
open access

Summary of Mercury Compatibility Issues for the Spallation Neutron Source Target Containment and Ancillary Equipment

Description: The purpose of this document is to summarize the primary results of the Hg compatibility research in support of the SNS target. In the absence of possible synergisms resulting from beam/irradiation effects, wetting of 316L/316LN stainless steel under SNS conditions by the Hg target is expected to be very limited. As a result, significant interactions such as dissolution, mass transfer, and embrittlement affecting general compatibility are not anticipated. A wide range of experiments on 316L/316… more
Date: April 8, 2003
Creator: Pawel, SJ
Partner: UNT Libraries Government Documents Department
open access

Elongation upon torsion in a theory for the inelastic behavior of metals

Description: The torsion of a thin-walled cylinder is studied using the low temperature or visco-plastic limit of Hart's state variable theory for the inelastic behavior of metals. For values of the shear stress lower than the hardness of the material, reversible elongation is found to accompany the recoverable twist. For shear stress exceeding the hardness, there are, in addition, a permanent twist and elongation. These predictions agree qualitatively with existing experiments. Detailed quantitative result… more
Date: November 1, 1978
Creator: Van Arsdale, W.E.; Hart, E.W. & Jenkins, J.T.
Partner: UNT Libraries Government Documents Department
open access

Design of Duplex Low-Carbon Steels With Carbide Forming Elements

Description: The design of duplex ferrite-martensite (DFM) steels with carbide forming elements were investigated. The alloys Fe/0.14 C/1.45 Si/X (X being the substitutional alloying element of Mos or Nb) were selected. The DFM microstructures are controlled by the type of alloy element and the subsequent thermal treatment. The tensile properties of specimens subjected to either the intermediate quench (IQ) or the intermediate air cool (IAC) heat treatments have been correlated with their respective microst… more
Date: December 1, 1978
Creator: Costello, P. K.
Partner: UNT Libraries Government Documents Department
open access

First results from electron-photon damage equivalence studies on a generic ethylene-propylene rubber

Description: As part of a simulator adequacy assessment program, the relative effectiveness of electrons and photons to produce damage in a generic ethylene propylene rubber (EPR) has been investigated. The investigation was limited in extent in that a single EPR material, in three thickness, was exposed to Cobalt-60 photons and three electron beam energies. Basing material damage on changes in the EPR mechanical properties elongation and tensile strength, we observed that EPR damage was a smoothly varying … more
Date: April 1, 1986
Creator: Buckalew, W.H.
Partner: UNT Libraries Government Documents Department
open access

Survey of Materials for Supercritical-Water Reactor

Description: Survey of properties of materials which might be suitable for use in various locations in a supercritical-water reactor. Properties examined include tensile strength, rupture strength, endurance strength, Young's modulus, tensile elongation, coefficient of thermal expansion, coefficient of thermal conductivity, density, nominal composition, usual heat treatments and thermal-neutron-absorption cross sections.
Date: November 27, 1953
Creator: Udy, Murray C. & Boulger, Francis W.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of polyphenylsulfone

Description: Polyphenylsulfone, an engineering thermoplastic, was evaluated for potential applications where its superior properties would be of benefit. The evaluation included analysis and characteriztion, physical testing, parametric responses, and moldability. Analytical tools used included thermomechanical analysis, thermogravimetric analysis, differential scanning calorimetry, and standard ASTM physical tests. Statistical studies were used to determine dimensional responses to conditional changes in m… more
Date: April 1, 1979
Creator: Hishaw, R.J.
Partner: UNT Libraries Government Documents Department
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Development and evaluation of elastomeric materials for geothermal applications. Annual report, October 1977-December 1978

Description: The research involved formulation of commercially available materials and synthesis of new elastomers. Formulation studies at JPL and elsewhere produced a material having about 250-350 psi tensile strength and 30 to 80% elongation at 260/sup 0/C for at least 24 hours in simulated brine. The relationship between these laboratory test results and sealing performance in actual or simulated test conditions is not entirely clear; however, it is believed that no conventional formation or casing packe… more
Date: May 15, 1979
Creator: Mueller, W. A.; Kalfayan, S. H.; Reilly, W. W.; Yavrouian, A. H.; Mosesman, I. D. & Ingham, J. D.
Partner: UNT Libraries Government Documents Department
open access

Strain hardening and ductility of iron: axisymmetric vs. plane strain elongation. Technical progress report

Description: The strain hardening of iron at high strains in plane strain elongation (strip drawing) is shown to fall increasngly below that of drawn iron wires at true strains above 2. This makes it unnecessary to invoke shear band formation simultaneously as a strengthening mechanism and as a ductility reducing mechanism in the drawn strip. Rather, shear bands may be a weakening mechanism in all contexts. A set of specimens of interstitial-free iron deformed in three of the four main classifications of de… more
Date: May 1, 1979
Creator: Langford, G.
Partner: UNT Libraries Government Documents Department
open access

Cobalt-60 simulation of LOCA (loss of coolant accident) radiation effects

Description: The consequences of simulating nuclear reactor loss of coolant accident (LOCA) radiation effects with Cobalt-60 gamma ray irradiators have been investigated. Based on radiation induced damage in polymer base materials, it was demonstrated that electron/photon induced radiation damage could be related on the basis of average absorbed radiation dose. This result was used to estimate the relative effectiveness of the mixed beta/gamma LOCA and Cobalt-60 radiation environments to damage both bare an… more
Date: July 1, 1989
Creator: Buckalew, W.H.
Partner: UNT Libraries Government Documents Department
open access

Tensile properties and swelling of 20%-cold-worked Type 316 stainless steel irradiated in HFIR

Description: Immersion density and elevated-temperature tensile properties were determined on 20%-cold-worked type 316 stainless steel irradiated in the HFIR at approximately 285, 370, 470, 560, and 620/sup 0/C to fluences of 1.8 to 6.2 x 10/sup 26/ neutrons/m/sup 2/ (> 0.1 MeV), which resulted in displacement damage levels of 16 to 54 dpa and helium concentrations of 900 to 3300 at. ppM. Tensile tests were done at temperatures near the estimated irradiation temperatures. Swelling increased with increasing … more
Date: January 1, 1984
Creator: Klueh, R.L. & Grossbeck, M.L.
Partner: UNT Libraries Government Documents Department
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Survey of degradation modes of candidate materials for high-level radioactive-waste disposal containers

Description: Six alloys are being considered as possible materials for the fabrication of containers for the disposal of high-level radioactive waste. Three of these candidate materials are copper-based alloys: CDA 102 (oxygen-free copper), CDA 613 (Cu-7Al), and CDA 715 (Cu-30Ni). The other three are iron- to nickel-based austenitic materials: Types 304L and 316L stainless steels and Alloy 825. Radioactive waste will include spent-fuel assemblies from reactors as well as waste in borosilicate glass and will… more
Date: August 1, 1988
Creator: Gdowski, G. E. & Bullen, D. B.
Partner: UNT Libraries Government Documents Department
open access

Updated evaluation of polymer films for electrical insulation

Description: Several types of tests have been run on polymer film materials that could be useful for electrical insulation. The polymers studied were polyethylene terephtalate, polycarbonate, polysulfone, polyetherimide, ultrahigh-molecular-weight polyethylene, polyimide, polybutylene terephthalate, and a laminate of Kraft paper and polypropylene. Thermal aging tests were run to 60,000 h on several of the polymers, and the samples were evaluated by tensile tests, electrical breakdown tests, and immersion de… more
Date: August 1, 1990
Creator: McCoy, H. E. Jr.
Partner: UNT Libraries Government Documents Department
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Advanced Gas Cooled Nuclear Reactor Materials Evaluation and Development Program. Progress report, January 1, 1978--March 31, 1978

Description: The activities associated with the procurement of the materials for the screening test program, information from vendor certification for the materials received, and preliminary information from the materials characterization tests performed by GE are reported. The construction status of the simulated reactor helium supply system, testing equipment, and gas chemistry analysis instrumentation and equipment are discussed. The final recommended impurity levels for the screening phase helium are pr… more
Date: June 26, 1978
Partner: UNT Libraries Government Documents Department
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Production of reactive sintered nickel aluminide

Description: Effort over the past 3 months was directed at increasing manufacturing capacity (ball milling) and improving product quality. Orders for the powder have increased, mainly for plasma spray powders. NiAl is an excellent coat between a metal and a ceramic, and its use instead of cobalt should extending operating range for carbide tools. The feather phase in the sintered Ni[sub 3]Al was identified to be a Ni-rich phase nucleated on the grain boundaries with 10 wt % Al composition. The ductile to br… more
Date: January 1, 1993
Creator: Cooper, R.M.
Partner: UNT Libraries Government Documents Department
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Mechanical and physical properties of uranium. Chapter 8 of nuclear metallurgy lectures

Description: A knowledge of the mechanical and physical properties of uranium is important in understanding its pile behavior. The effects of irradiation on the properties of uranium will be dealt with in another chapter. However, it is important to know and understand the pre-irradiation properties of uranium prior to investigating the effects of irradiation. This chapter discusses the mechanical and physical properties of uranium.
Date: May 10, 1955
Creator: Hueschen, R. E.
Partner: UNT Libraries Government Documents Department
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Compatibility of refrigerants and lubricants with engineering plastics. Quarterly technology progress reports, 1 July 1992--30 September 1992 [and] 1 October 1992--31 December 1992

Description: Seven oil immersion studies were completed at both 20 and 60C. Test bars used in this study fall within the manufacturer specification limits of physical consistency and integrity. Refrigerant Immersion studies at ambient and 60C are also complete. Equilibrium refrigerant gas solubilities of the 32 ISO VG branched acid polyolester with all ten refrigerants have been determined and completed at 20C. Finally, the thermal aging of plastics at constant refrigerant pressure exposure with seventeen r… more
Date: January 1, 1993
Creator: Cavestri, R. C.
Partner: UNT Libraries Government Documents Department
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Reactor Materials Program -- weldment component toughness of SRS PWS piping materials. Task number: 89-023-1

Description: The mechanical properties of austenitic stainless steel materials from the reactor systems in the unirradiated (baseline) and the irradiated conditions have been developed previously for structural and fracture analyses of the pressure boundary of the SRS reactor Process Water System (PWS) components. Individual mechanical specimen test results were compiled into three separate weldment components or regions, namely, the base, weld, and weld heat-affected-zone (HAZ), for two orientations (L-C a… more
Date: February 1, 1993
Creator: Sindelar, R. L.
Partner: UNT Libraries Government Documents Department
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