Access
Partner
UNT Libraries Government Documents Department
16,406
UNT Libraries Special Collections
10,989
Oklahoma Historical Society
2,437
UNT Libraries
301
Sterling Municipal Library
275
Dublin Public Library
272
Brownwood Public Library
238
Carl Albert Congressional Research and Studies Center
145
Rice University Woodson Research Center
97
Burleson Public Library
93
168 More
Collection
Office of Scientific & Technical Information Technical Reports
15,822
KXAS-NBC 5 News Collection
10,692
Texas Digital Newspaper Program
4,524
Oklahoma Digital Newspaper Program
2,613
Tocker Foundation Grant
2,394
The Oklahoma City Times
507
Chickasha Newspaper Collection
307
Sapulpa Area Newspaper Collection
291
Altus Times-Democrat
284
Sapulpa Herald
265
248 More
Degree Department
Degree Discipline
Degree Level
Country
States
Decade
Year
Month
Language
35,132 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
35,132
next
Comparison of ICEPEL predictions with single elbow flexible piping system experiment
The ICEPEL Code for coupled hydrodynamic-structural response analysis of piping systems is used to analyze an experiment on the response of flexible piping systems to internal pressure pulses. The piping system consisted of two flexible Nickel-200 pipes connected in series through a 90/sup 0/ thick-walled stainless steel elbow. A tailored pressure pulse generated by a calibrated pulse gun is stabilized in a long thick-walled stainless steel pipe leading to the flexible piping system which ended with a heavy blind flange. The analytical results of pressure and circumferential strain histories are discussed and compared against the experimental data obtained by Stanford Research Institute.
Date:
January 1, 1978
Creator:
A-Moneim, M.T. & Chang, Y.W.
Object Type:
Article
System:
The UNT Digital Library
Computer simulation of LMFBR piping systems. [Accident conditions]
Integrity of piping systems is one of the main concerns of the safety issues of Liquid Metal Fast Breeder Reactors (LMFBR). Hypothetical core disruptive accidents (HCDA) and water-sodium interaction are two examples of sources of high pressure pulses that endanger the integrity of the heat transport piping systems of LMFBRs. Although plastic wall deformation attenuates pressure peaks so that only pressures slightly higher than the pipe yield pressure propagate along the system, the interaction of these pulses with the different components of the system, such as elbows, valves, heat exchangers, etc.; and with one another produce a complex system of pressure pulses that cause more plastic deformation and perhaps damage to components. A generalized piping component and a tee branching model are described. An optional tube bundle and interior rigid wall simulation model makes such a generalized component model suited for modelling of valves, reducers, expansions, and heat exchangers. The generalized component and the tee branching junction models are combined with the pipe-elbow loop model so that a more general piping system can be analyzed both hydrodynamically and structurally under the effect of simultaneous pressure pulses.
Date:
January 1, 1977
Creator:
A-Moneim, M.T.; Chang, Y.W. & Fistedis, S.H.
Object Type:
Article
System:
The UNT Digital Library
Effects of Nonadiabatic Transitions on Invariants of the Motion.
None
Date:
January 1, 1972
Creator:
Aamodt, R. E. & Jaeger, E. F.
Object Type:
Report
System:
The UNT Digital Library
Anomalous fracture-extension pressure in granitic rocks
Fracture-extension pressures appreciably higher than the least principal earth-stress were observed in hydraulic fractures formed in a pair of 3 km (9600 ft) deep boreholes drilled near the Valles Caldera in northern New Mexico. Pressurization of open wellbores in rock containing preexisting fractures may open these fractures, instead of creating new fractures at right angles to the least principal stress. The pressure necessary to flow into these fractures may be appreciably higher than the least principal stress. Upon sand-propping one such pre-existing fracture, a lower fracture extension pressure was observed. A second fracture in a parallel well-bore 92 m (300 ft) away, at the same depth of 2 km (6500 ft) exhibited the lower fracture extension pressure without propping, but with about 90/sup 0/ difference in fracture direction. Fractures created through perforations at a depth of 3 km (9600 ft) not only exhibited breakdown pressures upon initial pressurization, but sometimes even higher ''breakdown'' pressures upon repressurization. These phenomena may be of interest in the interpretation of earth stress measurements made by hydraulic fracturing.
Date:
January 1, 1978
Creator:
Aamodt, R. L. & Potter, R. M.
Object Type:
Article
System:
The UNT Digital Library
Induction and Growth of Fractures in Hot Rock: Artifical Geothermal Reservoirs.
None
Date:
January 1, 1972
Creator:
Aamodt, R. L. & Smith, M. C.
Object Type:
Report
System:
The UNT Digital Library
Development of cermets for high level radioactive waste fixation
A method for the solidification and fixation of commercial and defense high-level radioactive wastes, namely a cermet process, is currently under development. Chemical and physical processing techniques, as developed up to this time, and the subsequent properties of the resulting cermet bodies are described; unique and advantageous features of the cermet waste form and the conversion process are discussed.
Date:
January 1, 1979
Creator:
Aaron, W S; Quinby, T C & Kobisk, E H
Object Type:
Article
System:
The UNT Digital Library
Cermets for high level waste containment
Cermet materials are currently under investigation as an alternate for the primary containment of high level wastes. The cermet in this study is an iron--nickel base metal matrix containing uniformly dispersed, micron-size fission product oxides, aluminosilicates, and titanates. Cermets possess high thermal conductivity, and typical waste loading of 70 wt % with volume reduction factors of 2 to 200 and low processing volatility losses have been realized. Preliminary leach studies indicate a leach resistance comparable to other candidate waste forms; however, more quantitative data are required. Actual waste studies have begun on NFS Acid Thorex, SRP dried sludge and fresh, unneutralized SRP process wastes.
Date:
January 1, 1978
Creator:
Aaron, W. S.; Quinby, T. C. & Kobisk, E. H.
Object Type:
Article
System:
The UNT Digital Library
Development and characterization of cermet forms for radioactive waste
Cermets designed to isolate high-level wastes in a solid form are a composite consisting of various ceramic phase particles uniformly dispersed in and microencapsulated by an iron-nickel base alloy matrix. The metal matrix provides this waste form with many advantageous features including excellent thermal conductivity and mechanical strength. These cermets are formed by first dissolving the waste in molten urea, precipitating and calcining all the constituents, compacting the calcine, and sintering and reduction to form the final product. The exact formulation of cermets through additions to the waste is designed to fix most of the fission products in stable, leach resistant ceramic phases which are subsequently microencapsulated by an alloy matrix. The alloy matrix, which is derived primarily from the waste itself and includes the reducible fission and activation products from the waste, can be compositionally adjusted through additions to optimize its corrosion resistance under conditions existing in various disposal environments. The processes by which cermets are formed include several new and unique materials preparation options that are being developed to permit engineering scale-up and to be compatible with remote operations. Cermets formed by alternate processing methods are being characterized. Initially, cermet samples were prepared using a laboratory scale, batch …
Date:
January 1, 1979
Creator:
Aaron, W. S.; Quinby, T. C. & Kobisk, E. H.
Object Type:
Article
System:
The UNT Digital Library
TCT hybrid preconceptual blanket design studies
The conceptual design of a tokamak fusion-fission (hybrid) reactor, which produces electric power and fissile material, has been performed in a cooperative effort between Princeton's Plasma Physics Laboratory (PPPL) and Battelle's Pacific Northwest Laboratories (PNL). PPPL, who had overall project lead responsibility, designed the fusion driver system. Its core consists of a tokamak plasma maintained in the two-component torus (TCT) mode by both D and T beams and having a single null poloidal divertor. The blanket concept selected by PPPL consists of a neutron multiplying converter region, containing natural Uranium Molybdenum (U-Mo) slugs followed by a fuel burning blanket region of molten salt containing PuF/sub 3/. PNL analyzed this concept to determine its structural, thermal and hydraulic performance characteristics. An adequate first wall cooling method was determined, utilizing low pressure water in a double wall design. A conceptual layout of the converter region tubes was performed, providing adequate helium cooling and the desired movement of U-Mo slugs. A thermal hydraulic analysis of the power-producing blanket regions indicated that either more helium coolant tubes are needed or the salt must be circulated to obtain adequate heat removal capability.
Date:
January 1, 1978
Creator:
Aase, D. T.; Bampton, M. C. C.; Doherty, T. J.; Leonard, B. R.; McCann, R. A.; Newman, D. F. et al.
Object Type:
Report
System:
The UNT Digital Library
Government Reorganization for Environmental Affairs During the 92nd Congress, 1st Session
This report discusses government reorganization of environmental affairs departments undertaken during the 1st session of the 92nd Congress.
Date:
January 17, 1972
Creator:
Abbasi, Susan R.
Object Type:
Report
System:
The UNT Digital Library
Water use alternatives for Navajo energy production
The Navajo have substantial resources of coal and uranium, and water use is certain to accompany development of these resources. A variety of supplies, however, are available--water in storage in Navajo Reservoir, water in existing uses which may be transferred, and groundwater. Furthermore, the quantity of water use varies over a wide range depending on the use of water conservation technologies such as dry coolers and wastewater treatment units. Joint management of energy and water resources requires a basic understanding of the water supply and demand alternatives available to the energy industry. Thus, the uses of water for key energy activities--coal and uranium mining, coal transportation (slurry pipelines), and coal conversion (electricity and synthetic gas production) are reviewed. For those activities for which water conservation is feasible, the technologies and estimate costs ($/af saved) are described. The range of water requirements are then compared to energy and water resource estimates. Finally, alternative (not necessarily exclusive) criteria for energy and water resource management are discussed: a) promote energy activities with the lowest minimum water requirements; b) require industry to use low-quality water resources and the most effective water conservation technology; and c) maximize the economic return on Navajo water resources ($/af …
Date:
January 1, 1979
Creator:
Abbey, D.
Object Type:
Article
System:
The UNT Digital Library
Imagery from Infrared Scanning of the East and Southwest Rift Zones of Kilauea and the Lower Portion of the Southwest Rift Zone of Mauna Loa, Island of Hawaii
From July 31 through August 4, 1973 night time flights for obtaining infrared imagery along the east and southwest rift zones of Kilauea and the southwest rift zone of Mauna Loa were undertaken on the island of Hawaii. Flights were also made on Hualalai and Kohala volcanoes but because of inconclusive results, they are not included in this report. Ground control stations had been established during daylight hours several days prior to starting the flight program. Students stationed at the ground central points guided the aircraft on predetermined flight paths by the use of directional lights which were visible to the plane's navigator. Results of the infrared scanning program are considered to be very successful. Events leading up to the final imagery on 8 x 10 color prints are discussed. The sum of $23,900 was designated by the NSF to be expended on aerial photogeologic work on the Hawaii Geothermal Project. Infrared scanning was the only aerial technique employed in this phase.
Date:
January 1, 1974
Creator:
Abbott, A. T.
Object Type:
Article
System:
The UNT Digital Library
Quantification of erythroid and granulocytic precursor cells in plateletpheresis residues
Mononuclear cell fractions of human blood and plateletpheresis residues were compared for their content of hemopoietic precursor cells. Erythroid burst-forming units (BFU-E) averaged 560 +- 130 per ml of blood and granulocyte--monocyte colony forming units (CFU-C) averaged 240 +- 90 per ml blood. Estimates based on a blood volume of 7% of body weight indicate that the total blood pools of BFU-E and CFU-C are about 3.5 x 10/sup 6/ and 1.5 x 10/sup 6/ cells respectively. Sequential studies were performed over 3 days following one plateletpheresis in 4 donors. CFU-C and BFU-E approximately doubled between 48 and 72 hours after a plateletpheresis. During this time there was no significant alteration in the percent of null, T or B lymphocytes in blood. Thus, plateletpheresis appears to lead to a mobilization of precursor cells, which results in a transient increase in their concentration in blood. Therefore, pheresis 48 to 72 hours after an initial short-term procedure could harvest much larger numbers of precursor cells. Moreover, such techniques would put blood precursor cell content of plateletpheresis residues within reach of the precursor cell content in the volume of human marrow used for transplantation.
Date:
January 1, 1978
Creator:
Abboud, C.N.; Brennan, J.K.; Lichtman, M.A. & Nusbacher, J.
Object Type:
Report
System:
The UNT Digital Library
Radiation considerations for superconducting fusion magnets
Radiation environment for the magnets is characterized for various conditions expected for tokamak power reactor operation. The radiation levels are translated into radiation effects using available experimental data. The impact of the tradeoffs in radiation shielding and the change in the properties of the superconducting magnets on reactor performance and economics is examined. It is shown that (1) superconducting magnets in fusion reactors will operate at much higher radiation level than was previously anticipated; (2) additional data on radiation damage is required to better accuracy than is presently available in order to accurately quantify the change in properties in the superconducting magnet components; and (3) there is a substantial penalty for increasing (or overestimating) the shielding requirements. A perspective of future tokamak power reactors is presented and questions relating to desirable magnetic field strength and selection of materials for superconducting magnets are briefly examined.
Date:
January 1, 1977
Creator:
Abdou, M. A.
Object Type:
Article
System:
The UNT Digital Library
Results of Systems Studies for the STARFIRE Commercial Tokamak
Extensive system and tradeoff studies were performed to support the selection process for the major parameters and design features of the STARFIRE commercial reactor. With a thermal power of 3800 MW, a neutron wall load of 3.5 MW/m/sup 2/ results in a relatively small-size reactor without imposing excessive requirements on the first-wall cooling capability, maximum toroidal-magnetic field, and frequency of structural material requirements. This moderately high-wall load requires that the first-wall coolant be liquid (water or lithium) and the lifetime of the structural material is > 15 MW-y/m/sup 2/. With moderate plasma elongation and beta the required maximum toroidal-field is approx. 11 T. STARFIRE is operated steady-state with no OH coil. The absence of an OH coil makes it possible to design the reactor with a low-aspect ratio (approx. 2.5) and small major radius. However, higher aspect ratios (approx. 3.5-4) are favored when the plasma current is driven with rf because the power required for the current drive, P/sub rf/, is much larger at lower aspect ratio. Since P/sub rf/ increases at lower plasma temperature, the optimum design for STARFIRE requires operation with plasma temperatures higher than those normally selected for designs with OH-driven current.
Date:
January 1, 1979
Creator:
Abdou, M. A.; Ehst, D. A. & Waganer, L. M.
Object Type:
Article
System:
The UNT Digital Library
Shielding and Maintainability in an Experimental Tokamak
This paper presents the results of an attempt to develop an understanding of the various factors involved. This work was performed as a part of the task assigned to one of the expert groups on the International Tokamak Reactor (INTOR). However, the results of this investigation are believed to be generally applicable to the broad class of the next generation of experimental tokamak facilities such as ETF. The shielding penalties for requiring personnel access are quantified. This is followed by a quantitative estimate of the benefits associated with personnel access. The penalties are compared to the benefits and conclusions and recommendations are developed on resolving the issue.
Date:
January 1, 1979
Creator:
Abdou, M. A.; Fuller, G.; Hager, E. R. & Vogelsang, W. F.
Object Type:
Article
System:
The UNT Digital Library
Abilene Philharmonic Playbill: January 20, 1970
Program for an Abilene Philharmonic concert performed on January 20th (third concert) during the 20th season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
January 1970
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Abilene Philharmonic Playbill: January 26, 1971
Program for an Abilene Philharmonic concert performed on January 26th (third concert) during the 21st season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
January 1971
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Abilene Philharmonic Playbill: January 25, 1972
Program for an Abilene Philharmonic concert that ran on January 25th (third concert) during the 22nd season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
January 1972
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Abilene Philharmonic Playbill: January 30, 1973
Program for an Abilene Philharmonic concert that ran on January 30th (third concert) during the 23rd season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
January 1973
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Abilene Philharmonic Playbill: January 29, 1974
Program for an Abilene Philharmonic concert that ran on January 29th (third subscription concert) during the 24th season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
January 1974
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Abilene Philharmonic Playbill: January 28, 1975
Program for an Abilene Philharmonic concert that ran January 28th (third concert) during the 25th season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
January 1975
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Abilene Philharmonic Playbill: January 27, 1976
Program for an Abilene Philharmonic concert that ran on January 27th during the 26th season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
January 1976
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Abilene Philharmonic Playbill: January 25, 1977
Program for an Abilene Philharmonic concert that ran on January 25th (third concert) during the 27th season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
January 1977
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History