You limited your search to:

  Partner: UNT Libraries Government Documents Department
 Collection: Technical Report Archive and Image Library
Spatial Burnout in Water Reactors with Nonuniform Startup Distributions of Uranium and Boron

Spatial Burnout in Water Reactors with Nonuniform Startup Distributions of Uranium and Boron

Date: March 23, 1955
Creator: Fox, Thomas A. & Bogart, Donald
Description: Spatial burnout calculations have been made of two types of water moderated cylindrical reactor using boron as a burnable poison to increase reactor life. Specific reactors studied were a version of the Submarine Advanced Reactor (sAR) and a supercritical water reactor (SCW) . Burnout characteristics such as reactivity excursion, neutron-flux and heat-generation distributions, and uranium and boron distributions have been determined for core lives corresponding to a burnup of approximately 7 kilograms of fully enriched uranium. All reactivity calculations have been based on the actual nonuniform distribution of absorbers existing during intervals of core life. Spatial burnout of uranium and boron and spatial build-up of fission products and equilibrium xenon have been- considered. Calculations were performed on the NACA nuclear reactor simulator using two-group diff'usion theory. The following reactor burnout characteristics have been demonstrated: 1. A significantly lower excursion in reactivity during core life may be obtained by nonuniform rather than uniform startup distribution of uranium. Results for SCW with uranium distributed to provide constant radial heat generation and a core life corresponding to a uranium burnup of 7 kilograms indicated a maximum excursion in reactivity of 2.5 percent. This compared to a maximum excursion of 4.2 percent obtained for ...
Contributing Partner: UNT Libraries Government Documents Department
Special bodies added on a wing to reduce shock induced boundary-layer separation at high subsonic speeds

Special bodies added on a wing to reduce shock induced boundary-layer separation at high subsonic speeds

Date: June 1, 1958
Creator: Whitcomb, Richard T
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Special Equipment in the Coal-Hydrogenation Demonstration Plant

Special Equipment in the Coal-Hydrogenation Demonstration Plant

Date: January 1950
Creator: Markovits, J. A.; Braun, K. C.; Donovan, J. T. & Sandaker, J. H.
Description: Report issued by the Bureau of Mines over the equipment used in coal hydrogenation demonstration plants. Detailed descriptions of the equipment and machinery are presented. This report includes tables, illustrations, and photographs.
Contributing Partner: UNT Libraries Government Documents Department
A special investigation to develop a general method for three-dimensional photoelastic stress analysis

A special investigation to develop a general method for three-dimensional photoelastic stress analysis

Date: January 1, 1953
Creator: Frocht, M M & Guernsey, R , Jr
Description: The method of strain measurement after annealing is reviewed and found to be satisfactory for the materials available in this country. A new general method is described for the photoelastic determination of the principal stresses at any point of a general body subjected to arbitrary load. The method has been applied to a sphere subjected to diametrical compressive loads. The results show possibilities of high accuracy.
Contributing Partner: UNT Libraries Government Documents Department
A special method for finding body distortions that reduce the wave drag of wing and body combinations at supersonic speeds

A special method for finding body distortions that reduce the wave drag of wing and body combinations at supersonic speeds

Date: January 1, 1956
Creator: Lomax, Harvard & Heaslet, Max A
Description: For a given wing and supersonic Mach number, the problem of shaping an adjoining fuselage so that the combination will have a low wave drag is considered. Only fuselages that can be simulated by singularities (multipoles) distributed along the body axis are studied. However, the optimum variations of such singularities are completely specified in terms of the given wing geometry. An application is made to an elliptic wing having a biconvex section, a thickness-chord ratio equal to 0.05 at the root, and an aspect ratio equal to 3. A comparison of the theoretical results with a wind-tunnel experiment is also presented.
Contributing Partner: UNT Libraries Government Documents Department
A special method for finding body distortions that reduce the wave drag of wing and body combinations at supersonic speeds

A special method for finding body distortions that reduce the wave drag of wing and body combinations at supersonic speeds

Date: May 20, 1955
Creator: Lomax, Harvard & Heaslet, Max A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Special Power Excursion Reactor Test III Pressurizer Vessel Failure

Special Power Excursion Reactor Test III Pressurizer Vessel Failure

Date: January 29, 1962
Creator: Heffner, R. E.; Wilson, T. R.; Halls, D. P.; Hickman, W. W. & Hoopingarner, K. R.
Description: Report documenting results of a study of the cause of failure at the SPERT III reactor facility.
Contributing Partner: UNT Libraries Government Documents Department
Special propeller protractor

Special propeller protractor

Date: January 1, 1928
Creator: Heim, A M
Description: A special protractor was designed and built with a view towards supplying a simple, inexpensive, practical, portable instrument for making measurements to detect propeller warpage under practically all conditions, without the use of auxiliary equipment, and without having to remove the propeller from the airplane. A detailed description is given of the protractor. Techniques for measuring are described. Directions are given on how to use the protractor to set detachable blade-type propellers on an airplane.
Contributing Partner: UNT Libraries Government Documents Department
Special Studies in Electrolysis Mitigation: 4. A Preliminary Report on Electrolysis Mitigation in Elyria, Ohio, with Recommendations for Mitigation

Special Studies in Electrolysis Mitigation: 4. A Preliminary Report on Electrolysis Mitigation in Elyria, Ohio, with Recommendations for Mitigation

Date: January 22, 1916
Creator: McCollum, Burton & Logan, K. H.
Description: Technical paper issued by the Bureau of Standards over surveys conducted on the electrical conditions of railway tracks in Elyria, Ohio. The results of the surveys are presented and discussed. This paper includes tables, maps, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Special Studies of Reservoir Oils in Naval Petroleum Reserve No. 1, Elk Hills Field, California

Special Studies of Reservoir Oils in Naval Petroleum Reserve No. 1, Elk Hills Field, California

Date: April 1947
Creator: Cook, Alton B. & Shea, G. B.
Description: Report from the U.S. Bureau of Mines on studies conducted on the reservoir oils of Elk Hills field. Methods and instrumentation used in the studies are presented. This report includes tables, graphs, and maps.
Contributing Partner: UNT Libraries Government Documents Department