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AN INFORMATION STORAGE AND RETRIEVAL SYSTEM FOR IRRADIATION EFFECTS IN METALS
An information storage and retrieval system (PIC) was developed, utilizing the IBM 7090 computer, for handling data pertaining to the effects of neutron irradiation on metals. The input includes a reference identification, an appropriate abstract or extract summarizing the article, code identification parameters analogous to those used by the ASM-SLA Literature Classification System, and special codes identifying relevant irradiation and testing parameters. The output contains the same data plus printing out the meaning of all special codes. Presently, the information storage consists of more than two hundred references representing several thousand lines of information. The system is both general and definitive, permitting the selection of a single piece of information or of many references dealing with a general field. It is possible to select material on the basis of one or more of the following factors: material, general or specific; type of literature; general or specific property such as mechanical tests or tensile tests; conditions of irradiation including type and level of flux, integrated flux, irradiation temperature, and reactor environment; test conditions such as temperature and environment; and general variables that might be controlling such as strain rate, specimen geometry, grain size, and fabrication history. It is felt that this …
Date:
August 15, 1963
Creator:
Bush, S. H.
Object Type:
Article
System:
The UNT Digital Library
Analysis of Vanadium in Milk Powder by Neutron Activation Analysis Using a Rapid Radiochemical Separation of 3.77-Minute Vanadium-52
A procedure is described for the activation determination of V in powdered milk using 3.77-min V/sup 52/. The quantity of V in the sample is obtained by comparing the V/sup 52/ radioactivity found in the test sample with the V/sup 52/ radioactivity in a V comparator sample that is treated in the same manner as the test sample. The procedure can also be used for the determination of V in a variety of materials. (P.C.H.)
Date:
November 15, 1963
Creator:
Molinski, V. J.; Wahl, W. H. & Strain, W. H.
Object Type:
Article
System:
The UNT Digital Library
A Versatile Spectrometer Magnet Power Supply
Early results from actual laboratory operation of a more versatile magnet supply.
Date:
April 15, 1963
Creator:
Groppe, W. A.
Object Type:
Report
System:
The UNT Digital Library
Radioisotopic heat sources. Revision 1
For the radioisotopes with half-lives over a year, only eight appear to be obtainable in the foreseeable future. The fission products, strontium-90, cesium-137, and promethium-147, exist in wastes from reactor processing, diluted with enormous volumes of other elements and salts. Among those isotopes producible by irradiation of special target materials (cobalt-60, uranium-232, plutonium-238, and curium-244) cobalt-60, though easy to produce, requires a special design for the heat source generator because much of its emitted energy is penetrating gamma radiation. Cobalt-60 appears, therefore, to be rather limited in its prospects for use. Plutonium-238 is favored as a heat source because of its long half-line and no need for special shielding. However, its projected high cost, scarcity, and biological hazard encourages the search for a competitive material. When plutonium assumes a significant place as a recycled fuel in thermal reactors for power production, curium-244 can then become available at costs below that for plutonium-238. Curiunm-244 has five times the specific power of plutonium-238 and appears to be just as easy to handle. Promethium-147, although probably on the ''short end'' of the half-life scale, can be considered for some uses as a substitute for plutonium-238. Although the factors of availability, gamma activity, and …
Date:
October 15, 1963
Creator:
Rohrmann, C.A.
Object Type:
Report
System:
The UNT Digital Library
Activation of electrical machinery. Supplement 1. [Preliminary evaluation; not applicable to ground tests]
The following analysis of the induced radioactivity in SNAP-50/SPUR electrical machinery having a high cobalt content is submitted. Induced radioactivity in the flight vehicle will contribute negligibly to allowable radiation levels. This is especially so due to the low neutron to gamma ratio of assumed radiation damage tolerances to semiconductors. A calculation to estimate the order of magnitude of induced radioactivity in cobalt is attached. The calculation is based on a best guess of the neutron spectrum directly behind a lithium hydride shield. The resulting low cobalt activity and associated dose rate of about 1 mr/hr at 10 ft from a generator or a motor is insignificant. Although the evaluation indicates insignificant levels of induced radioactivity, this conclusion is not applicable to a ground test. Neutron moderation and scattering from a containment vessel and biological shield would greatly perturb the neutron environment behind the flight shield. Posttest handling of all components within the vacuum test chamber will undoubtedly be a problem. Notwithstanding the importance of limiting induced radioactivity, other considerations such as economy, cooling and vacuum requirements will largely dictate the final facility design. In summary, an activation analysis involves the overall facility design and will not be readily resolved. …
Date:
November 15, 1963
Creator:
Smolen, J.R.
Object Type:
Report
System:
The UNT Digital Library
Two-Facility Approach to Investigations of Fast Reactor Meltdowns
Report issued by the APDA over studies conducted on hypothetical fast reactor meltdown accidents. As stated in the summary, "the purpose of this study is to investigate the technical feasibility of conducting fast reactor meltdown experiments to determine a more realistic maximum accident and to provide a better evaluation of fast reactor safety" (p. 7). This report includes tables, and illustrations.
Date:
January 15, 1963
Creator:
Doyle, T. A.; Page, E. M.; Nicholson, R. B.; Hagstrom, J. T. & Nims, J. B.
Object Type:
Report
System:
The UNT Digital Library
BREMSSTRAHLUNG IN A DENSE PLASMA
The bremsstrahlung emitted by an electron scattered in a Coulomb field was first calculated by Bethe and Heitler. The total cross section for production of photons with wave number between k and k + dk by a nonrelativistic electron of kinetic energy {epsilon} is d{sigma}/dk dk = 16/3 Z{sup 2}r{sub 0}{sup 2} (e{sup 2}/hc) (mc{sup 2}/{epsilon})log ({radical} {epsilon}/hck + {radical} {epsilon}/hck -1) dk/k, where Ze is the charge of the (heavy) ion, and r{sub 0} is the classical electron radius. Bremsstrahlung in a plasma has been computed by a number of authors in the approximation of replacing the Coulomb field by a cut-off Coulomb or static Debye potential. It is the purpose of this communication to call attention to another important effect of the medium upon the rate of emission of bremsstrahlung. This may be described as a modification of the relation of the photon's energy to its wave number, due to the index of refraction of the medium. Equivalently, we note that one must include in the calculation of bremsstrahlung in a medium the photon-medium interactions which result in the 'clothing' of a 'bare' photon. The replacement of a particle by a quasiparticle has long been known to be …
Date:
January 15, 1963
Creator:
Stack, John D. & Sessler, Andrew M.
Object Type:
Article
System:
The UNT Digital Library
The Dublin Progress (Dublin, Tex.), Vol. 75, No. 21, Ed. 1 Thursday, August 15, 1963
Weekly newspaper from Dublin, Texas that includes local, state, and national news along with advertising.
Date:
August 15, 1963
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Shamrock Texan (Shamrock, Tex.), Vol. 60, No. 19, Ed. 1 Thursday, August 15, 1963
Weekly newspaper from Shamrock, Texas that includes local, state, and national news along with advertising.
Date:
August 15, 1963
Creator:
Montgomery, Arval
Object Type:
Newspaper
System:
The Portal to Texas History
Honey Grove Signal-Citizen (Honey Grove, Tex.), Vol. 72, No. 45, Ed. 1 Friday, November 15, 1963
Weekly newspaper from Honey Grove, Texas that includes local, state, and national news along with advertising.
Date:
November 15, 1963
Creator:
Morrow, Joe T.
Object Type:
Newspaper
System:
The Portal to Texas History
Honey Grove Signal-Citizen (Honey Grove, Tex.), Vol. 72, No. 10, Ed. 1 Friday, March 15, 1963
Weekly newspaper from Honey Grove, Texas that includes local, state, and national news along with advertising.
Date:
March 15, 1963
Creator:
Morrow, Joe T.
Object Type:
Newspaper
System:
The Portal to Texas History
Honey Grove Signal-Citizen (Honey Grove, Tex.), Vol. 72, No. 6, Ed. 1 Friday, February 15, 1963
Weekly newspaper from Honey Grove, Texas that includes local, state, and national news along with advertising.
Date:
February 15, 1963
Creator:
Morrow, Joe T.
Object Type:
Newspaper
System:
The Portal to Texas History
The Bellaire Texan (Bellaire, Tex.), Vol. 10, No. 12, Ed. 1 Wednesday, May 15, 1963
Weekly newspaper from Bellaire, Texas that includes local, state, and national news along with advertising.
Date:
May 15, 1963
Creator:
Norton, Mary
Object Type:
Newspaper
System:
The Portal to Texas History
The Comanche Chief (Comanche, Tex.), Vol. 89, No. 34, Ed. 1 Friday, February 15, 1963
Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date:
February 15, 1963
Creator:
Wilkerson, J. C.
Object Type:
Newspaper
System:
The Portal to Texas History
The Comanche Chief (Comanche, Tex.), Vol. 91, No. 21, Ed. 1 Friday, November 15, 1963
Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date:
November 15, 1963
Creator:
Wilkerson, J. C.
Object Type:
Newspaper
System:
The Portal to Texas History
The Bogata News (Bogata, Tex.), Vol. 53, No. 44, Ed. 1 Thursday, August 15, 1963
Weekly newspaper from Bogata, Texas that includes local, state, and national news along with advertising.
Date:
August 15, 1963
Creator:
Grant, George
Object Type:
Newspaper
System:
The Portal to Texas History
The Comanche Chief (Comanche, Tex.), Vol. 89, No. 38, Ed. 1 Friday, March 15, 1963
Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date:
March 15, 1963
Creator:
Wilkerson, J. C.
Object Type:
Newspaper
System:
The Portal to Texas History
[Credit Receipt for Paul A. Hill #2]
Receipt for Paul A. Hill displaying the number of federal service "credit" points he has earned.
Date:
July 15, 1963
Creator:
United States. Air Force.
Object Type:
Text
System:
The Portal to Texas History
The Brady Herald (Brady, Tex.), Vol. 20, No. 9, Ed. 1 Tuesday, January 15, 1963
Weekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
January 15, 1963
Creator:
Wilson, Bob
Object Type:
Newspaper
System:
The Portal to Texas History
The Brady Standard and Heart O' Texas News (Brady, Tex.), Vol. 54, No. 22, Ed. 1 Friday, March 15, 1963
Weekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
March 15, 1963
Creator:
Smith, L. B.
Object Type:
Newspaper
System:
The Portal to Texas History
The Brady Standard and Heart O' Texas News (Brady, Tex.), Vol. 54, No. 18, Ed. 1 Friday, February 15, 1963
Weekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
February 15, 1963
Creator:
Smith, L. B.
Object Type:
Newspaper
System:
The Portal to Texas History
The Brady Standard and Heart O' Texas News (Brady, Tex.), Vol. 55, No. 5, Ed. 1 Friday, November 15, 1963
Weekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
November 15, 1963
Creator:
Smith, L. B.
Object Type:
Newspaper
System:
The Portal to Texas History
The Brady Herald (Brady, Tex.), Vol. 20, No. 48, Ed. 1 Tuesday, October 15, 1963
Weekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
October 15, 1963
Creator:
Wilson, Bob
Object Type:
Newspaper
System:
The Portal to Texas History
The Panola Watchman (Carthage, Tex.), Vol. 90, No. 37, Ed. 1 Thursday, August 15, 1963
Weekly newspaper from Carthage, Texas that includes local, state, and national news along with advertising.
Date:
August 15, 1963
Creator:
Applegate, Clabe
Object Type:
Newspaper
System:
The Portal to Texas History