1,938 Matching Results

Search Results

prev Results: 73 - 96 next
open access

Ultrasonic welding of nylon cell cases on a nickel--cadmium battery

Description: A joint design and ultrasonic welding schedule capable of making a leak-tight pressure joint in nylon was developed. This will permit the replacement of polystyrene with nylon for cell cases on a nickel--cadmium battery.
Date: August 1, 1973
Creator: Bengtson, G W
Partner: UNT Libraries Government Documents Department
open access

Distribution and chemical analyses of thermal springs in Alaska. [Data compilation]

Description: Interest in geothermal systems as potential sources of energy has been increasing in the past decade. Thermal or hot springs commonly occur as surface manifestation of geothermal systems. One of the first steps in evaluating the potential of such systems is the compilation of an inventory of known thermal springs and available chemical data. The only previous such compilation in Alaska has been by Waring (1917) who listed 75 known hot springs and 22 chemical analyses; a later world-wide summary… more
Date: 1973
Creator: Miller, Thomas P.
Partner: UNT Libraries Government Documents Department
open access

Temperature gradients in Harney County, Oregon

Description: As part of a brief reconnaissance of southeastern Oregon, temperatures were measured in five wells in the Harney Basin during May of 1972. The results are presented together with a summary of temperature gradients previously published by Bowen (1972) and one well measured by C. E. Van Ostrand. The location of the wells and the average temperature gradient in /sup 0/C/km and the temperature profiles measured by the U.S. Geological Survey are presented graphically. The wells vary in depth up to 4… more
Date: January 1, 1973
Creator: Sass, J. H. & Munroe, R. J.
Partner: UNT Libraries Government Documents Department
open access

The deposition of particulates in air sampling tubes

Description: An investigation was performed to define particulate deposition in exhaust air sampling tubes for plutonium areas. Twelve sampling tubes were washed with nitric acid. Residues from wash solutions were counted for total alpha activity. Results indicate negligible sample loss due to particulate deposition in sample delivery tubes.
Date: April 30, 1973
Creator: Mossoni, N. J. & Kittinger, W. D.
Partner: UNT Libraries Government Documents Department
open access

Design for Krypton-85 Enrichment by Thermal Diffusion

Description: Substantial quantities of krypton having a krypton-85 concentration of less than 10% will become available if nuclear fuel-processing plants are required to collect the gaseous fission products rather than releasing them into the atmosphere. A modular thermal diffusion unit was designed for the enrichment of the krypton-85 to useful concentrations of greater than 45%. The design emphasizes reliability and integrity by incorporating no moving parts within the unit. The modular design also offers… more
Date: April 1, 1973
Creator: Schwind, Roger A. & Rutherford, William M.
Partner: UNT Libraries Government Documents Department
open access

An Investigation of Metallurgical Factors Which Affect the Fracture Toughness of Ultra High Strength Steels

Description: The relationship between microstructure, heat treatment and room temperature fracture toughness has been determined for the low alloy ultra-high strength steels 4130, 4330, 4340, 4140 and 300-M. Optical metallography, microprobe analysis, and scanning electron microscopy were used to characterize the structure and morphology, while both Charpy V-notch impact tests and plane strain fracture toughness tests were used to determine the fracture properties. The normal commercial heat treatment resul… more
Date: May 1, 1973
Creator: Wood, William E.; Parker, Earl R. & Zackay, Victor F.
Partner: UNT Libraries Government Documents Department
open access

SEM Facility for Examination of Reactive and Radioactive Materials

Description: A scanning electron microscope (SEM) facility for the examination of tritium-containing materials is operational at Mound Laboratory. The SEM is installed with the sample chamber incorporated as an integral part of an inert gas glovebox facility to enable easy handling of radioactive and pyrophoric materials. A standard SEM (ETEC Model B-1) was modified to meet dimensional, operational, and safety-related requirements. A glovebox was designed and fabricated which permitted access with the glove… more
Date: June 1, 1973
Creator: Downs, G. L. & Tucker, P. A.
Partner: UNT Libraries Government Documents Department
open access

Secondary succession: Composition of the vegetation and primary production in the field-to-forest at Brookhaven, Long Island, N.Y.

Description: Natural communities respond to disruption through a series of changes in plant and animal communities that are broadly predictable. The field-to-forest sere of central Long Island follows the pattern set forth earlier for the Piedmont of North Carolina and for New Jersey. The communities of herbs that occur in the years immediately after abandonment are followed by an Andropogon stage which is replaced before the 20th year by pine forest. The pine is replaced in the next 25 years by oak-pine, w… more
Date: August 23, 1973
Creator: Woodwell,G.M.; Holt, B. R. & Flaccus, E.
Partner: UNT Libraries Government Documents Department
open access

Baseline Gas Turbine Development Program Second Quaterly Progress Report

Description: Progress is reported for a program to demonstrate by 1976 an experimental gas turbine powered automobile which meets the 1976 Federal Emissions standards and which is competitive in fuel economy, performance, reliability, and potential manufacturing cost with the conventional piston engine powered, standard size American automobile. Procurement delays have caused engine deliveries to slip one to two months. Assembly of Engine 3 with special instrumentation for NASA and Engine 4 to be used in th… more
Date: April 30, 1973
Creator: Wagner, C. E.
Partner: UNT Libraries Government Documents Department
open access

Critical Concentration Of Uranium Solution

Description: The experiments with U(37)O{sub 2}F{sub 2} aqueous solution followed the series of experiments with {sup 233}UO{sub 2}(NO{sub 3}){sub 2} and U(93)O{sub 2}(NO{sub 3}){sub 2} solutions in the 69.2-cm-diam sphere. The critical concentrations of {sup 233}U and {sup 235}U were used to evaluate the ratio of {ovr {eta}{sigma}{sub a}}(233)/{ovr {eta}{sigma}{sub a}}(235) some years ago when the accepted value of {ovr {eta}}(233) was questioned. The purpose of the experiment reported here was to measure … more
Date: November 3, 1973
Creator: Magnuson, D. W.
Partner: UNT Libraries Government Documents Department
open access

DISTRIBUTION OF RADIOACTIVE JACKRABBIT PELLETS IN THE VICINITY OF THE B-C CRIBS, 200 EAST AREA U.S.A.E.C. HANFORD RESERVATION

Description: During 1972 and 1973 a study was conducted in the B-C Cribs, 200 East Area, to learn the extent to which jackrabbits (Lepus californicus) and their predators had dispersed buried radioactive wastes in their fecal pellets and scats. The specific objective was to gather sufficient data on the pattern of dispersal so that statistically valid sampling strategies could be developed in future programs, depending upon management planning objectives for the area. A secondary objective was to relate the… more
Date: September 1, 1973
Creator: O'Farrell, Thomas P.; Fitzner, R. E. & Gilbert, Richard O.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of the Effects of Geothermal Reservoir Fluid Temperature on the Costs of Steam Production and Power Generation

Description: This report provides a preliminary evaluation of the effect of reservoir temperatures on the cost of geothermal hot water wells and flash-steam gathering systems to support a 50,000 kW power plant. Comparisons are made of the capital investments required for each case and the corresponding payout period based on steam costs of 6 mill/kWh of power generated. In order to show how the reservoir temperatures and steam cost affect the cost of electric power delivered to the high tension bus at the p… more
Date: April 1, 1973
Partner: UNT Libraries Government Documents Department
open access

Stratigraphy and Geologic History of the Montana Group and Equivalent Rocks, Montana, Wyoming, and North and South Dakota

Description: From introduction: This is a progress report on regional stratigraphic and paleontologic studies of the Upper Cretaceous Montana Group and equivalent rocks in the northern part of the western interior of the United States. It presents preliminary data on the positions of strandlines during a 14-m.y. (million year) span of the Late Cretaceous as well as our interpretations of the geologic history of this period.
Date: 1973
Creator: Gill, James R. & Cobban, William Aubrey
Partner: UNT Libraries Government Documents Department
open access

Noise Analysis of Statham Temperature Chamber

Description: A procedure is described to subdue the noise made by the LN2 control valve on a Statham Temperature Chamber.
Date: January 15, 1973
Creator: Mielke, R. L.
Partner: UNT Libraries Government Documents Department
open access

Development of high-specific-energy batteries for electric vehicles. Progress report, February 1973--July 1973

Description: A high-specific-energy lithium/sulfur battery having the performance characteristics required for powering pollutionfree automobiles is described. The cells currently under development have negative electrodes of molten lithium and positive electrodes of sulfur (plus an additive to reduce the sulfur vapor pressure) separated by a molten lithium halide-containing electrolyte. The operating temperature of the cells is about 400 deg C. The performance goals for a single cell include a capacity den… more
Date: December 1, 1973
Creator: Nelson, P. A.; Gay, E. C.; Steunenberg, R. K.; Battles, J. E.; Schertz, W. W.; Vissers, D. R. et al.
Partner: UNT Libraries Government Documents Department
open access

Faceting of high angle grain boundaries in the coincidence lattice

Description: Faceting of high angle grain boundaries in SIGMA = 3 and SIGMA = 5 coincidence lattices of the fcc structure was studied using thinfilm bicrystal specimens of controlled geometry. A number of relatively high index boundaries in the coincidence lattices (containing relatively low planar densities of coincidence sites) was found to break up into low energy facets corresponding to low index planes of the coincidence lattices (containing high densities of coincidence lattice sites). These results a… more
Date: November 16, 1973
Creator: Wagner, W.R.; Tan, T.Y. & Balluffi, R.W.
Partner: UNT Libraries Government Documents Department
open access

Isotopic power materials development progress report for December 1971

Description: >Progress reported includes preparation and tensile properties of Pt-Rh-- W alloys, oxidation of Ir, and effects of 0/sub 2/ and CO on tensile properties of T-111 and TZM. (DLC)
Date: November 26, 1973
Creator: Donnelly, R.G.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen