165 Matching Results

Search Results

Results: 1 - 24 next
open access

A 40 kWe Thermionic Power System for a Manned Space Laboratory

Description: Report describing a thermionic reactor power system for application to a long-lived, manned space laboratory. Design description, design analysis, and operational analysis descriptions are included.
Date: July 1, 1971
Creator: Gietzen, A. J.; Homeyer, William G.; Heath, C. A.; Hackney, M. R.; Merrill, M. H.; Fisher, C. R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Allis-Chalmers Critical Facility: Final Safeguards Report

Description: Report discussing the final safeguards integrated into the design of the Pathfinder Atomic Power Plant for the Northern States Power Company. The plant is designed by the Allis-Chalmers Manufacturing Company in Greendale, Wisconsin. Description of the facility, operating procedures, experiments, accident analysis, safety features of the reactor, and make up of the surrounding area are included.
Date: May 1, 1959
Creator: Allis-Chalmers Manufacturing Company
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Alternating Direction and Semi-Explicit Difference Methods for Parabolic Partial Differential Equations

Description: "The energy method is applied to study the stability of two types of difference approximations to parabolic partial differential equations, the alternating direction methods Douglas, Peaceman, and Rachford, and a new semi- explicit method. Each difference scheme is proved to be unconditionally stable. These results apply to parabolic equations with variable coefficients, defined in cylindrical domains with an essentially arbitrary bounded base."
Date: March 1, 1961
Creator: Lees, Milton
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Application of Nuclear Energy to Agriculture

Description: Differences were found in the radiosensitivity of cacao clones. Studies are continuing to see if these differences are related to nuclear damage. Radiosensitivity of rubber, palms, and bananas are being studies. Angustifolia mutants appeared from irradiated coffee seeds. The response was linear with thermal neutrons but exponential with gamma rays. The hypothesis of a two hit chromosomal aberration is being tested with coffee and Crotalaria which probably gave an exponential response (sectorial… more
Date: March 1, 1960
Creator: {{{name}}}
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bimetallic Casting

Description: "Uranium and zirconium were bonded by melting the two metals in contact with one another in a bimetallic casting process. Tensile tests of specimens containing the original zone of interface between the two metals showed that all failures were at locations other than the interface. The coefficients obtained for diffusion between molten uranium and molten zirconium varied from 2.13 cm squared per day at 3,380 degrees F. to 9.17 cm squared per day at 3,510 degrees F. the activation energy for th… more
Date: September 1, 1962
Creator: Poole, Thomas & Krashes, David
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Binary-to-Decimal Converter

Description: A system of standard electronic logical circuits which stores a seven-bit binary member, converts the binary number to its decimal equivalent, and then indicates the decimal equivalent in direct-reading neon lights is described.
Date: September 1, 1956
Creator: Stearns, Samuel D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Biological Effects of Radiation, and Related Biochemical and Physical Studies : Semiannual Progress Report [for] Period May 1, 1959 - October 31, 1959

Description: Progress reports from four divisions are included: (1) Division of Biophysics; (2) Division of Clinical Investigation; (3) Division of Nucleoprotein Chemistry; and (4) Radiochemistry Section.
Date: December 1, 1959
Creator: Denues, Arthur Russell Taylor, 1914-
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Brazing of Zircaloy 3 for Temperature Instrumented Probes

Description: Report describing a study to investigate the strength, ductility and corrosion resistance in 680 degree Fahrenheit water of several alloys for brazing Zircaloy 3 to itself. The conclusions and results of the study are summarized and data from the is presented in tables and summarized in the narrative.
Date: May 1, 1957
Creator: Gerken, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Calculation of Parameters for Low Pressure Gas Liquefaction Cycles

Description: The purpose of the study reported here was to investigate qualitatively low pressure methods for the liquefaction of hydrogen. The desirability of such an investigation grew out of the successful development of low pressure helium refrigeration systems, examples of which are The Collins Helium Cryostat and Helium Refrigerated Transport Dewar. There are two basic practical cycles for liquefying hydrogen at low working pressures.
Date: March 1, 1953
Creator: McMahon, Howard O. & Golden, Gerald H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Chattanooga Shale of Tennessee as a Source of Uranium: Final Report

Description: From major objective: The over-all aim of the study has been to obtain a thorough geologic picture of the Chattanooga shale in the area under consideration, with emphasis upon stratigraphic relationships and associated special problems from which, in turn, implications may be obtained as to the origin and age of the formation and possibly the source of the uranium. The study has not been aimed primarily at exploration for uranium and its economic aspects.
Date: July 1, 1959
Creator: Stockdale, Paris B. & Klepser, Harry J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Chemical Effects of 1 Mev Electrons on BrF3 at 25 degrees C

Description: "An investigation of the chemical effects of 1-Mev electrons on BrF3 at 25 degrees C has been carried out. Pressure measurements taken during the irradiation suggest the presence of Br2 and BrF5 as decomposition products and a fractional distillation of the irradiated liquid confirmed their presence. The extent of decomposition was determined both by fraction distillation and spectrophotometric methods. The radiation effect seemed to reach saturation when approximately 10 per cent of the BrF3… more
Date: October 1, 1954
Creator: Yosim, S. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Cobalt Transformation

Description: The fcc hcp transformation in cobalt powder (equilibrium temperature = 417 C) was studied by x-ray methods and correlated with the density of stacking faults in both phases. Only the hcp phase is present in the cold-worked powder. The line broadening due to local strains and small particle sizes can be essentially removed by annealing at 300 C, leaving a residual broadening that permits a quantitative determination of the density of random growth and deformation faults. The latter are present i… more
Date: April 1, 1959
Creator: Houska, C. R.; Averbach, B. L. (Benjamin Lewis) & Cohen, Morris, 1911-2005
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Comparison of Radiation--Induced Graft Copolymerization Utilizing Electron Accelerators and Isotope Sources as Radiation Initiators

Description: "The grafting of methacrylic acid, styrene (2: 1 mole ratio) co-monomer mixture on polypropylene film and fabric, was studied to compare electron accelerators and isotopes as sources of radiation. An aluminum block that contalns i/8-in.-deep pockets covered with Mylar film for holding sample and monomer during mutual irradiatlon was developed. A preliminary comparison was made in post grafting polypropylene film and fabric preirradiated with Cow and with an electron accelerator source. It was f… more
Date: December 1, 1960
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Comparison of Some Piezoelectric Ceramics

Description: This memorandum summarizes some of the basic physical properties of barium titanate, lead-zirconate titanate, and lead metaniobate which are of importance to the use of these materials as piezoelectric transducers. Emphasis is placed on the advantages of lead metaniobate due to its extended temperature range of operation and on the importance of further work to improve the quality of this material.
Date: February 1, 1957
Creator: Barger, R. L. & Canfield, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Crack Propagation Tests ofZincaloy-2 Reactor Pressure Tubing in Both the Normal and Hydrided Conditions

Description: The purpose of this document is to discuss the problems of crack propagation, and catastrophic brittle fracture and to discuss tests that are designed to predict the ability of the material to resist brittle fracture.
Date: June 1, 1954
Creator: Aungst, R. C. & Defferding, Leo J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Creation of Sexual Isolation by Artificial Selection

Description: Two laboratory strains of D. melanogaster - Ore R marked with the recessive stw and Florida marked with the recessive se -- were carried in a mixed population through 33 generations. In each generation the percentage of stw, se, and wild-type flies was determined; the wild-type flies were discarded, and the next generation set up with equal numbers virgins of the two recessive strains. In spite of a contamination which brought in double recessive phenotypes from generation 16 on, the percentage… more
Date: August 1, 1952
Creator: King, James C.; Wallace, Bruce. & Wright, Theodore R. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Design and Uses of High Flux Research and Test Reactors

Description: The need for thermal and fast neutron fluxes in the range of 1 to 5 x l0/ sup 15/ neutrons/cm/sup 2/(sec) for the production of heavy elements such as Cf/ sup 252/ and other special isotopes and for improving the quality of beam experiments, reactor materials testing work, and solid state research has led to plans for the construction of three ultra high flux research reactors. The designs of these and other high flux research reactors are based on the general technology of enriched tank-type r… more
Date: January 1, 1959
Creator: Lane, J. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Detection of Small Amounts of Fluorine in Large Amounts of Chlorine

Description: Abstract: "Tests have been developed for both the qualitative detection and quantitative determination of fluorine in chlorine. The qualitative test is made by passing the gas through manganous chloride. If the pink solid tubes brown there is greater than 0.5 percent of fluorine in the gas. The quantitative test is a modification of the Steiger and Marvin Test with oxidized titanium solution."
Date: April 1, 1946
Creator: Lafferty, Robert H., Jr. & Winget, Rasho
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Determination of half life of polonium-210 by counting: final report

Description: Introduction: "A number of determination have been made of the half life of polonium-210 by calorimetry. Counting affords an entirely different method of determining half lives and requires only a small amount of activity. Therefore for comparison a half-life determination by counting was undertaken with a sample of approximately 0.5 millicurie of polonium."
Date: June 1, 1951
Creator: Curtis, Mary Lou
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen