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HYDRAULIC CONDUCTIVITY OF ESSENTIALLY SATURATED PEAT

Description: The Savannah River National Laboratory measured the hydraulic conductivity of peat samples using method ASTM D4511-00. Four samples of peat were packed into 73mm diameter plastic tubes and saturated from the bottom up with water. The columns were packed with Premier ProMoss III TBK peat to a dry density of approximately 0.16 gm/cc (10 lb/ft3). One column was packed using oven dried peat and the other 3 were packed using as delivered peat. The oven dried sample was the most difficult to saturate… more
Date: February 27, 2008
Creator: Nichols, R
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

HYDROGEN EFFECTS ON THE BURST PROPERTIES OF TYPE 304L STAINLESS STEEL FLAWED VESSELS

Description: The effect of hydrogen on the burst properties Type 304L stainless steel vessels was investigated. The purpose of the study was to compare the burst properties of hydrogen-exposed stainless steel vessels burst with different media: water, helium gas, or deuterium gas. A second purpose of the tests was to provide data for the development of a predictive finite-element model. The burst tests were conducted on hydrogen-exposed and unexposed axially-flawed cylindrical vessels. The results indicate … more
Date: March 27, 2008
Creator: Morgan, M; Monica Hall, M; Ps Lam, P & Dean Thompson, D
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Polymer surface coatings for downconversion of uv radiation and inhibition of photodegradation. Semiannual technical status report, June 1978--January 1979

Description: Cerous (III) polymethacrylate (CPMA), prepared by saponifying a commercial polymethyl methacrylate (PLEXIGLAS) and subsequently neutralized with cerous nitrate, were cast into film from its ethyl acetate solution. CPMA films were subjected to intense uv radiation in order to accelerate the solarization, and they were found to be substantially less susceptible to uv induced degradation than the control which was the film cast from polymethacrylic acid (PMA). A set of CPMA coated PLEXIGLAS films … more
Date: January 27, 1979
Creator: Yen, W M & Yu, H
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Denuded Zones, Diffusional Creep, and Grain Boundary Sliding

Description: The appearance of denuded zones following low stress creep in particle-containing crystalline materials is both a microstructural prediction and observation often cited as irrefutable evidence for the Nabarro-Herring mechanism of diffusional creep. The denuded zones are predicted to be at grain boundaries that are orthogonal to the direction of the applied stress. Furthermore, their dimensions should account for the accumulated plastic flow. In the present paper, the evidence for such denuded z… more
Date: June 27, 2001
Creator: Wadsworth, J; Ruano, O A & Sherby, O D
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

PRESSURIZATION OF CONTAINMENT VESSELS FROM PLUTONIUM OXIDE CONTENTS

Description: Transportation and storage of plutonium oxide is typically done using a convenience container to hold the oxide powder which is then placed inside a containment vessel. Intermediate containers which act as uncredited confinement barriers may also be used. The containment vessel is subject to an internal pressure due to several sources including; (1) plutonium oxide provides a heat source which raises the temperature of the gas space, (2) helium generation due to alpha decay of the plutonium, (3… more
Date: March 27, 2012
Creator: Hensel, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

LOW AMPLITUDE SINGLE AND MULTIPLE SHOCK INITIATION EXPERIMENTS AND MODELING OF LX-04

Description: Shock initiation experiments were performed on the plastic bonded explosive (PBX) LX-04 (85% HMX, 15% Viton binder) using single and multiple low amplitude shocks to obtain pressure history data for use in Ignition and Growth reactive flow modeling parameterization. A 100 mm diameter propellant driven gas gun was utilized to initiate the LX-04 explosive charges containing manganin piezoresistive pressure gauge packages placed between explosive discs. In the single shock experiments, the run dis… more
Date: June 27, 2006
Creator: Vandersall, K S; Tarver, C M; Garcia, F; Chidester, S; Urtiew, P A & Forbes, J W
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

On the Nature of Variations in Density and Composition within TATB-based Plastic Bonded Explosives

Description: Initiation of insensitive high explosives is affected by porosity in the 100 nm to micron size range. It is also recognized that as-pressed plastic bonded explosives (PBX) are heterogeneous in composition and density at much coarser length scale (10 microns-100 microns). However, variations in density and composition of these explosives have been poorly characterized. Here, we characterize the natural variations in composition and density of TATB-based PBX LX-17 with synchrotron radiation tomog… more
Date: June 27, 2006
Creator: Kinney, J H; Willey, T M & Overturf, G
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Differential Soil Impedance Obstacle Detection Quarterly Report

Description: This project develops a new and unique obstacle detection sensor for horizontal directional drilling (HDD) equipment. The development of this new technology will greatly improve the reliability and safety of natural gas HDD construction practices. This sensor utilizes a differential soil impedance measurement technique that will be sensitive to the presence of plastic and ceramic, as well as metallic obstacles. The use of HDD equipment has risen significantly in the gas industry because HDD pro… more
Date: November 27, 2002
Creator: Kieba, Maximillian J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Identification and Toxicological Assessment of Thermal Degradation Products of Organic Constituents of Parts Comprising LLNL Design ARG Phase 2 Interim Report

Description: The goals of Phase II of the Non Rad Toxics Project were: (1) To identify and quantify the major chemicals comprising smoke from smoldering plastics most prevalent in the LLNL designed weapons as well as materials unique to LANL designed weapons and SANDIA parts found in the LLNL and LANL weapons; and (2) To perform toxic assessment of the identified chemicals using existing literature information or TOPKAT, a computer program designed for toxic assessment of organic and certain organo-metallic… more
Date: October 27, 1999
Creator: Lipska, A.E. & Lopez, R.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[News Script: Paper banquet]

Description: Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story about the effect of paper and plastic on ecology being discussed at the Southwestern Paper Merchants Association and Paper Suppliers Convention in Fort Worth.
Date: April 27, 1971, 10:00 p.m.
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Script
Partner: UNT Libraries Special Collections
open access

Analysis of Neutron and Photon Detection Position for the Calibration of Plastic (BC-420) and Liquid (BC-501) Scintillators

Description: This report presents the results of the neutron and photon calibration of a Bicron BC-420 plastic scintillator and a BC-501 liquid scintillator using a set of reference gamma sources and a Cf-252 source. The position of neutron and photon detection inside the scintillators as a function of energy is investigated by Monte Carlo simulation.
Date: August 27, 2003
Creator: Pozzi, S.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Newtonian Flow in Bulk Amorphous Alloys

Description: Bulk amorphous alloys have many unique properties, e.g., superior strength and hardness, excellent corrosion resistance, reduced sliding friction and improved wear resistance, and easy formability in a viscous state. These properties, and particularly easy formability, are expected to lead to applications in the fields of near-net-shape fabrication of structural components. Whereas large tensile ductility has generally been observed in the supercooled liquid region in metallic glasses, the exac… more
Date: September 27, 2000
Creator: Wadsworth, J. & Nieh, T. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

[News Script: Coal]

Description: Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story of a Denton plastics manufacturer who has come up with a coal-conversion process which he claims is the answer to the energy crisis.
Date: December 27, 1973, 10:00 p.m.
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Script
Partner: UNT Libraries Special Collections
open access

Aging of Polyurethane Foam Insulation in Simulated Refrigerator Panels--One-Year Results with Third-Generation Blowing Agents

Description: Laboratory data are presented on the effect of constant-temperature aging on the apparent thermal conductivity of polyurethane foam insulation for refrigerators and freezers. The foam specimens were blown with HCFC-141b and with three of its potential replacements--HFC-134a, HFC-245fa, and cyclopentane. Specimens were aged at constant temperatures of 90 F, 40 F, and {minus}10 F. Thermal conductivity measurements were made on two types of specimens: full-thickness simulated refrigerator panels c… more
Date: September 27, 1999
Creator: Gabbard, W. A.; Weaver, F. J. & Wilkes, K. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Method to Correlate CFD Discriminator Level and Energy Deposition by Neutrons and Photons in a Fast Plastic Scintillating Detector

Description: This paper presents an experimental approach to determine the neutron and gamma ray thresholds in fast, organic scintillating detectors. Neutron threshold energy is determined using a time-of-flight technique, while gamma ray threshold is inferred by locating the Compton edge for various reference gamma sources. These energy thresholds are then related to the Constant Fraction Discriminator (CFD) levels used in these experiments.
Date: June 27, 2000
Creator: Chiang, L. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[News Script: Tease]

Description: Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story of plastics manufacturer who says he can make gasoline for a cent-and-half a gallon.
Date: December 27, 1973, 10:00 p.m.
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Script
Partner: UNT Libraries Special Collections
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