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Cause of pitting in beryllium
Light microscopy, bare-film radiography, secondary ion mass spectroscopy, electron microprobe and physical testing were used to examine beryllium specimens exhibiting a stratified, pitted, pattern after chemical milling. The objective was to find the cause of this pattern. Specimens were found to have voids in excess of density specification allowances. These voids are attributed, at least in part, to the sublimation of beryllium fluoride during the vacuum hot pressing operation. The origin of the pattern is attributed to these voids and etching out of fines and associated impurities. Hot isostatic pressing with a subsequent heat treatment close residual porosity and dispersed impurities enough to correct the problem.
Date:
April 16, 1982
Creator:
Kershaw, R. P.
Object Type:
Article
System:
The UNT Digital Library
PPBS in 1970: Methodology and Implementation, An Annotated Bibliography
This report provides an annotated bibliography of resources related to the Federal Planning-Programming-Budgeting System (PPBS) focused on its methodology and structure.
Date:
April 16, 1970
Creator:
Chartrand, Robert L. & Becker, Louise G.
Object Type:
Report
System:
The UNT Digital Library
[Letter from Ricardo Hernandez to Jack Davis, April 16, 1990]
Photocopy of a letter from Ricardo Hernandez, Director of Programs at Texas Commission on the Arts, to Jack Davis. Congratulating Davis on the success of his project since its inception. Continued in the letter Hernandez accepts his invitation and active participation to join the advisory committee for the Institute. Hernandez thanks Davis for his service to the state and its people, as well as expresses his excitement to be apart of this project, and writes that the earlier he knows about the meeting dates the likely he is able to be a full participant.
Date:
April 16, 1990
Creator:
Hernandez, Ricardo
Object Type:
Letter
System:
The UNT Digital Library
Enhancing the use of coals by gas reburning-sorbent injection
The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NO{sub x}) and sulfur (SO{sub x}), on two coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices: tangential and cyclone fired. A third unit, wall fired, is on hold'' because of funding limitations. The specific objectives are to demonstrate reductions of 60 percent in NO{sub x} and 50 percent in SO{sub x} emissions, by a combination of two developed technologies, gas reburning (GR) and sorbent injection (SI). With GR, about 80--85 percent of the coal fuel is fired in the primary combustion zone. The balance of this fuel is added downstream as natural gas to create a slightly fuel rich environment in which NO{sub x} is converted to N{sub 2}. The combustion process is completed by overfire air addition. SO{sub x} emissions are reduced by injecting dry sorbents (usually calcium based) into the upper furnace. The sorbents trap SO{sub x} as solid sulfates that are collected in the particulate control device.
Date:
April 16, 1990
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
New concept for a high-power beam dump
A new concept for a dump for the ion and neutral beams used in the controlled nuclear fusion program uses thin sheets of a refractory metal such as tungsten formed into troughs having semi-circular cross sections. High-velocity water flowing circumferentially removes heat by subcooled nucleate boiling. Possible advantages are modular construction, lower water-pumping power, and a lower pressure drop than in conventional beam dumps. An example design calculation is shown for a dump capable of absorbing an incident flux of 10 kW/cm/sup 2/.
Date:
April 16, 1980
Creator:
Moir, R.W. & Taylor, C.E.
Object Type:
Article
System:
The UNT Digital Library
Enhanced coal hydrogasification via oxidative pretreatment
The gasification of coal char by hydrogen is much slower than in steam or carbon dioxide; moreover, hydrogasification rate in pure hydrogen decreases sharply with conversion for most carbons. To overcome this kinetic behavior, the oxidation of the char prior to and during hydrogasification has been investigated as a means of enhancing hydro gasification rate. Kinetic rate studies under well-characterized conditions have been complemented by careful surface analyses to characterize oxygen on the char surface prior to and during hydrogasification.
Date:
April 16, 1992
Creator:
Miller, D.J.
Object Type:
Report
System:
The UNT Digital Library
[News Clip: Komen race]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
April 16, 1994, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Management of solid waste
Compliance with the latest regulatory requirements addressing disposal of radioactive, hazardous, and sanitary solid waste requires the application of numerous qualitative and quantitative criteria in the selection, design, and operation of solid waste management facilities. Due to the state of flux of these regulatory requirements from EPA and NRC, several waste management options were identified as being applicable to the management of the various types of solid waste. This paper highlights the current regulatory constraints and the design and operational requirements for construction of both storage and disposal facilities for use in management of DOE-ORO solid waste. Capital and operational costs are included for both disposal and storage options.
Date:
April 16, 1980
Creator:
Thompson, W.T. & Stinton, L.H.
Object Type:
Article
System:
The UNT Digital Library
Nuclear reactor control apparatus. [FBR]
Nuclear reactor safety rod release apparatus comprises a ring which carries detents normally positioned in an annular recess in outer side of the rod, the ring being held against the lower end of a drive shaft by magnetic force exerted by a solenoid carried by the drive shaft. When the solenoid is de-energized, the detent-carrying ring drops until the detents contact a cam surface associated with the lower end of the drive shaft, at which point the detents are cammed out of the recess in the safety rod to release the rod from the drive shaft. In preferred embodiments of the invention, an additional latch is provided to release a lower portion of a safety rod under conditions that may interfere with movement of the entire rod.
Date:
April 16, 1981
Creator:
Sridhar, B.N.
Object Type:
Patent
System:
The UNT Digital Library
H-coal fluid dynamics. Final report, August 1, 1977-December 31, 1979
This report presents the results of work aimed at understanding the hydrodynamic behavior of the H-Coal reactor. A summary of the literature search related to the fluid dynamic behavior of gas/liquid/solid systems has been presented. Design details of a cold flow unit were discussed. The process design of this cold flow model followed practices established by HRI in their process development unit. The cold fow unit has been used to conduct experiments with nitrogen, kerosene, or kerosene/coal char slurries, and HDS catalyst, which at room temperature have properties similar to those existing in the H-Coal reactor. Mineral oil, a high-viscosity liquid, was also used. The volume fractions occupied by gas/liquid slurries and catalyst particles were determined by several experimental techniques. The use of a mini-computer for data collection and calculation has greatly accelerated the analysis and reporting of data. Data on nitrogen/kerosene/HDS catalyst and coal char fines are presented in this paper. Correlations identified in the literature search were utilized to analyze the data. From this analysis it became evident that the Richardson-Zaki correlation describes the effect of slurry flow rate on catalyst expansion. Three-phase fluidization data were analyzed with two models.
Date:
April 16, 1980
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Logan County News. (Crescent, Okla.), Vol. 12, No. 23, Ed. 1 Friday, April 16, 1915
Weekly newspaper from Crescent, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 16, 1915
Creator:
Frishman, Joseph
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Oklahoma State Register. (Guthrie, Okla.), Vol. 12, No. 18, Ed. 1 Thursday, April 16, 1903
Weekly newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
April 16, 1903
Creator:
Golobie, John
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Democrat. (Altus, Okla.), Vol. 2, No. 4, Ed. 1 Thursday, April 16, 1908
Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 16, 1908
Creator:
Williams, Bob
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Star. (Mangum, Okla. Terr.), Vol. 15, No. 41, Ed. 1 Thursday, April 16, 1903
Weekly newspaper from Mangum, Oklahoma that includes local, territorial, and national news along with advertising.
Date:
April 16, 1903
Creator:
Echols, R. C. & Townsend, G. B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Star. (Mangum, Okla.), Vol. 20, No. 42, Ed. 1 Thursday, April 16, 1908
Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 16, 1908
Creator:
Taylor, J. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Democrat (Altus, Okla.), Vol. 7, No. 7, Ed. 1 Thursday, April 16, 1914
Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 16, 1914
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Greer County Democrat (Mangum, Okla.), Vol. 24, No. 31, Ed. 1 Thursday, April 16, 1914
Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 16, 1914
Creator:
Watt, W. O.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Weekly Oklahoma State Capital. (Guthrie, Okla.), Vol. 10, No. 3, Ed. 2 Saturday, April 16, 1898
Weekly newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
April 16, 1898
Creator:
Greer, Frank H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Weekly Oklahoma State Capital. (Guthrie, Okla.), Vol. 10, No. 3, Ed. 1 Saturday, April 16, 1898
Weekly newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
April 16, 1898
Creator:
Greer, Frank H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Taloga Times. (Taloga, Okla.), Vol. 17, No. 26, Ed. 1 Thursday, April 16, 1914
Weekly newspaper from Taloga, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 16, 1914
Creator:
Hays, S. J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guthrie Daily Star (Guthrie, Okla.), Vol. 9, No. 31, Ed. 1 Tuesday, April 16, 1912
Daily newspaper from Guthrie, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 16, 1912
Creator:
Hornaday, W. H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Crowder City Guardian (Crowder, Oklahoma), Vol. 4, No. 25, Ed. 1 Friday, April 16, 1909
Weekly newspaper from Crowder, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 16, 1909
Creator:
Barrow, A. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Twice-A-Week Sun. (Guthrie, Okla.), Vol. 2, No. 23, Ed. 1 Wednesday, April 16, 1913
Semi-weekly newspaper from Guthrie, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 16, 1913
Creator:
Hubbard, J. H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla.), Vol. 18, No. 5, Ed. 1 Thursday, April 16, 1908
Weekly newspaper from Guymon, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 16, 1908
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History