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Rapid heating tensile tests of hydrogen-charged high-energy-rate-forged 316L stainless steel
316L stainless steel is a candidate material for construction of equipment that will be exposed to tritium. Proper design of the equipment will require an understanding of how tritium and its decay product helium affect mechanical properties. This memorandum describes results of rapid heating tensile testing of hydrogen-charged specimens of high-energy-rate-forged (HERF) 316L stainless steel. These results provide a data base for comparison with uncharged and tritium-charged-and-aged specimens to distinguish the effects of hydrogen and helium. Details of the experimental equipment and procedures and results for uncharged specimens were reported previously. 3 refs., 10 figs.
Date:
May 19, 1989
Creator:
Mosley, W. C.
Object Type:
Report
System:
The UNT Digital Library
1983 Texas Air control Board Summary of Total Suspended Particulate Data
Report documenting air quality measurements throughout the state of Texas for calendar year 1983, including a summary and information about specific pollutants.
Date:
May 19, 1986
Creator:
Texas Air Control Board
Object Type:
Report
System:
The Portal to Texas History
Program plan for TNX Area groundwater characterization wells
The TNX Area post-Cretaceous hydrogeological section consists of an unconfined aquifer in recent to Pliestocene age sediments and a confined aquifer in tertiary aged sediments. The unconfined aquifer is a local water bearing reservoir and will not be correlated to a specific stratigraphic unit at this time. Depth to the water table ranges from 25 feet at the New TNX Seepage Basin to 50 feet at the Old TNX Seepage Basin. The unconfined aquifer is 45--50 feet thick and outcrops in the swamp to the west of TNX. The hydraulic gradient in the unconfined aquifer decreases westerly across the TNX Area from 0.05 to 0.01. The unconfined aquifer is separated from the underlying confined aquifer by a sandy slit aquitard (A1) which is approximately 5--10 feet thick. Researchers reported an increase in hydraulic head across this unit of approximately 8 feet which results in an upward gradient between the unconfined and confined aquifer. The confined Tertiary aquifer (C1) at TNX is 25--30 feet thick and can generally be found 60 to 90 feet below the surface. The C1 aquifer is part of the aquifer commonly referred to as the Congaree'' which occurs in the Congaree Formation. The C1 aquifer lies …
Date:
May 19, 1989
Creator:
Nichols, R. L.
Object Type:
Report
System:
The UNT Digital Library
The Soviets' 5-Year Plan (1981-1985)
On Jan. 1, 1981 the Soviet Union's Eleventh Five Year Plan (1981-85) began. An analysis of the new plan provides some insights into Soviet priorities and economic prospects for the next half-decade. The following are the plan's main goals: to allocate sufficient investment funds to ensure adequate growth of output in the industry, agriculture, transportation, energy, and other sectors; to raise consumer income sufficiently to provide needed incentives and increase consumer satisfaction; to meet security needs at home and abroad; and to import technology, grain and other goods needed to meet priority domestic goals.
Date:
May 19, 1983
Creator:
Hardt, John P. & Gold, Donna L.
Object Type:
Report
System:
The UNT Digital Library
Nova control system: goals, architecture, and system design
The control system for the Nova laser must operate reliably in a harsh pulse power environment and satisfy requirements of technical functionality, flexibility, maintainability and operability. It is composed of four fundamental subsystems: Power Conditioning, Alignment, Laser Diagnostics, and Target Diagnostics, together with a fifth, unifying subsystem called Central Controls. The system architecture utilizes a collection of distributed microcomputers, minicomputers, and components interconnected through high speed fiber optic communications systems. The design objectives, development strategy and architecture of the overall control system and each of its four fundamental subsystems are discussed. Specific hardware and software developments in several areas are also covered.
Date:
May 19, 1982
Creator:
Suski, G. J.; Duffy, J. M.; Gritton, D. G.; Holloway, F. W.; Krammen, J. R.; Ozarski, R. G. et al.
Object Type:
Article
System:
The UNT Digital Library
Direct catalytic conversion of methane and light hydrocarbon gases. Quarterly report No. 10, January 1--March 31, 1989
The goal of this research is to develop catalysts that directly convert methane and light hydrocarbons to intermediates that later can be converted to either liquid fuels or value-added chemicals, as economics dictate. In this reporting period, we have utilized samples of magnesia differing in their pretreatment temperature. Both the hydrido-ruthenium complex H{sub 4}Ru{sub 4}(CO){sub 12} and its reaction product with triethyl aluminum were reacted with these samples. The two ruthenium clusters are expected to react with the magnesia surface in different ways: by deprotonation of the hydride through an acid-base reaction with the basic surface, or by hydrolysis of the aluminum-carbon bond of the triethyl aluminum adduct. The concentration of hydroxyl groups on the magnesia surface able to hydrolyze the aluminum-carbon bond for immobilation should vary depending on the temperature of the pretreatment; the concentration of basic sites which can deprotonate the cluster should also vary with temperature. These differences were borne out by the experiment. We also compared the activity of two batches of AlRu{sub 4}/MgO which had been synthesized at different times in the project. Both batches had approximately the same activity, but the newer batch had greater selectivity for C{sub 6+} hydrocarbons.
Date:
May 19, 1989
Creator:
Wilson, R. B., Jr.; Posin, B. M. & Chan, Yee Wai
Object Type:
Report
System:
The UNT Digital Library