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Water resources review: Wheeler Reservoir, 1990
Protection and enhancement of water quality is essential for attaining the full complement of beneficial uses of TVA reservoirs. The responsibility for improving and protecting TVA reservoir water quality is shared by various federal, state, and local agencies, as well as the thousands of corporations and property owners whose individual decisions affect water quality. TVA's role in this shared responsibility includes collecting and evaluating water resources data, disseminating water resources information, and acting as a catalyst to bring together agencies and individuals that have a responsibility or vested interest in correcting problems that have been identified. This report is one in a series of status reports that will be prepared for each of TVA's reservoirs. The purpose of this status report is to provide an up-to-date overview of the characteristics and conditions of Wheeler Reservoir, including: reservoir purposes and operation; physical characteristics of the reservoir and the watershed; water quality conditions: aquatic biological conditions: designated, actual, and potential uses of the reservoir and impairments of those uses; ongoing or planned reservoir management activities. Information and data presented here are form the most recent reports, publications, and original data available. 21 refs., 8 figs., 29 tabs.
Date:
September 1, 1990
Creator:
Wallus, Robert & Cox, Janice P.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of the water quality in the releases from thirty dams in the Tennessee River Valley
The Tennessee Valley Authority (TVA) has routinely monitored dissolved oxygen (DO) and temperature from the tailwater releases of its dams since the 1950s. The original objective of this monitoring was to collect baseline information to support reaeration research and determine the relative impact of impoundments on the assimilative capacity of the river system. This monitoring has continued even though the original objective was satisfied. New purposes for this monitoring data have arisen in support of several programs, without new consideration of the monitoring strategy and sampling design. The primary purpose of this report is to compare the historical release data for 30 dams in the Tennessee Valley based on four different objectives: (1) comparison of seasonal patterns, (2) comparison of baseline conditions using descriptive statistics, (3) evaluation of monotonic trends, and (4) discussion of monitoring strategies that might be required to determine compliance with existing and proposed criteria. A secondary purpose of the report is to compile the existing database into tables and figures that would be useful for other investigators. 51 refs., 210 figs., 1 tab.
Date:
September 1, 1990
Creator:
Butkus, S. R.
Object Type:
Report
System:
The UNT Digital Library
Status of Cherokee Reservoir
This is the first in a series of reports prepared by Tennessee Valley Authority (TVA) for those interested in the conditions of TVA reservoirs. This overviews of Cherokee Reservoir summarizes reservoir and watershed characteristics, reservoir uses and use impairments, water quality and aquatic biological conditions, and activities of reservoir management agencies. This information was extracted from the most current reports, publications, and data available, and interviews with water resource professionals in various Federal, state, and local agencies and in public and private water supply and wastewater treatment facilities. 11 refs., 4 figs., 1 tab.
Date:
August 1, 1990
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Status of Blue Ridge Reservoir
This is one in a series of reports prepared by the Tennessee Valley Authority (TVA) for those interested in the conditions of TVA reservoirs. This overview of Blue Ridge Reservoir summarizes reservoir and watershed characteristics, reservoir uses and use impairments, water quality and aquatic biological conditions, and activities of reservoir management agencies. This information was extracted from the most current reports and data available, as well as interview with water resource professionals in various federal, state, and local agencies. Blue Ridge Reservoir is a single-purpose hydropower generating project. When consistent with this primary objective, the reservoir is also operated to benefit secondary objectives including water quality, recreation, fish and aquatic habitat, development of shoreline, aesthetic quality, and other public and private uses that support overall regional economic growth and development. 8 refs., 1 fig.
Date:
September 1, 1990
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Coal gasification for the coproduction of electricity and fertilizer
TVA is proposing to develop and commercially demonstrate the coproduction of electricity and fertilizer (urea) using integrated gasification/combined cycle (IGCC) technology. The coal-based coproduction demonstration project will show that the coproduction process can economically and environmentally enhance the production of both electric power and urea. As conceptualized, the proposed coproduction demonstration project facility would be designed for a nominal electrical capacity of about 250 megawatts (MW), Table I. During normal operation, the facility would produce about 150 MW of base-load electrical power and 1,000 tons per day of urea. Sulfur from the coal would be recovered as elemental sulfur. During peak power demand, the fertilizer capacity could be reduced or bypassed and the full 250 MW could be made available. This scheme would allow continuous operation of the gasifier at 100% of its rated capacity which would reduce the annual revenue requirements for power generation by permitting the production of fertilizer. As TVA's vision of this proposal matures (i.e., as consideration is given to alternative schemes, as TVA reviews its power demands, and as more detailed engineering estimates are developed), the nature and scope of cyclic-operation may be altered.
Date:
January 1, 1992
Creator:
Kelly, D. A.; Nichols, D. E. & Faucett, H. L.
Object Type:
Article
System:
The UNT Digital Library
Chemical activation of molecules by metals: Experimental studies of electron distributions and bonding
Purpose of this research program is to obtain experimental information on the different fundamental ways metals bond and activate organic molecules. Our approach has been to directly probe the electronic interactions between metals and molecules through a wide variety of ionization spectroscopies and other techniques, and to investigate the relationships with bonding modes, structures, and chemical behavior. During this period, we have (1) characterized the electronic features of diphosphines and monophosphines in their coordination to metals, (2) carried out theoretical and experimental investigations of the bonding capabilities of C[sub 60] to transition metals, (3) developed techniques for the imaging of single molecules on gold substrates that emphasizes the electronic backbonding from the metal to the molecule, (4) obtained the high resolution photoelectron spectrum of pure C[sub 70] in the gas phase, (5) compared the bonding of [eta][sup 3]- acetylide ligands to the bonding of other small organic molecules with metals, and (6) reported the photoelectron spectra and bonding of [eta][sup 3]-cyclopropenyl groups to metals.
Date:
January 1, 1992
Creator:
Lichtenberger, D.L.
Object Type:
Report
System:
The UNT Digital Library
Environmental control implications of generating electric power from coal. 1977 technology status report. Appendix F. Flue gas desulfurization in the United States, 1977. [108 references]
This report details the current status of flue gas desulfurization (FGD) in conventional coal-fired power plants in the U.S. Sepecifications and features are listed for all commercial FGD installations now in operation or being constructed in this country. The FGD operational experience in each plant is summarized and evaluations are made of process, equipment, and operational performance. FGD in other countries, mainly Japan and West Germany, is reviewed for applicability in the U.S. Federal and state air quality control standards are described and their prime influence on FGD development and plant installation is noted. The rising importance of coal is discussed and some limitations on low-sulfur coal are included. Other potential approaches to desulfurization, such as fluidized-bed combustion, are discussed as far as relevant to FGD. Limestone and lime slurry processes greatly predominate among existing and planned FGD installations in the U.S. However, soluble SO/sub 2/ sorbants are noted as entering use for both throwaway and recoverable SO/sub 2/ products. It is recognized that recovery processes offer attractive long-term prospects in terms of resources and of apparent cost of operation. However, they remain very limited, both in number of processes and in level of development. The report shows that sustained …
Date:
December 1, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Approaches to verification of two-dimensional water quality models
The verification of a water quality model is the one procedure most needed by decision making evaluating a model predictions, but is often not adequate or done at all. The results of a properly conducted verification provide the decision makers with an estimate of the uncertainty associated with model predictions. Several statistical tests are available for quantifying of the performance of a model. Six methods of verification were evaluated using an application of the BETTER two-dimensional water quality model for Chickamauga reservoir. Model predictions for ten state variables were compared to observed conditions from 1989. Spatial distributions of the verification measures showed the model predictions were generally adequate, except at a few specific locations in the reservoir. The most useful statistics were the mean standard error of the residuals. Quantifiable measures of model performance should be calculated during calibration and verification of future applications of the BETTER model. 25 refs., 5 figs., 7 tabs.
Date:
November 1, 1990
Creator:
Butkus, S.R. (Tennessee Valley Authority, Chattanooga, TN (USA). Water Quality Dept.)
Object Type:
Report
System:
The UNT Digital Library
Unique biophysical studies with diatomic deuterium beams. [Survival studies with V79 Chinese hamster cells]
By irradiating cells attached to thin Mylar foils with diatomic deuteron beams, the role of interaction distance in radiobiology can be investigated in a unique manner. The molecule breaks up into two separate ions which diverge from each other because of the multiple scattering process in the foil and in the cellular material. A distribution of separation distances results whose characteristic separation depends on the Mylar foil thickness. An experimental facility to use diatomic beams is described. Cell survival results for V79 Chinese hamster cells synchronized in late S phase show that damage does result from tracks separated by as much as 250 nm. However, damage also results from interaction at nanometer dimensions.
Date:
January 1, 1978
Creator:
Rohrig, N.; Bird, R. P.; Colvett, R. D.; Rossi, H. H. & Marino, S. A.
Object Type:
Article
System:
The UNT Digital Library
MOLECULAR COMPLEXES OF FLAVINS AND PHENOLS. IV. SEMIQUINONE HYDROIODIDE COMPLEXES
None
Date:
January 1, 1964
Creator:
Fleischman, Darrell E. & Tollin, Gordon
Object Type:
Report
System:
The UNT Digital Library
Experimental Gas Cooled Reactor. Final Hazards Summary Report. Volume I. Description and Hazards Evaluation (Book 1 and Book 2)
A detailed piant description including layout drawings is presented. The results obtained in analysis of credible accidents and the associated hazards are also given. (J.R.D.)
Date:
October 10, 1962
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
RADIOLOGICAL HEALTH MANUAL FOR THE EXPERIMENTAL GAS-COOLED REACTOR. RADIATION PROTECTION STANDARDS AND REGULATIONS
None
Date:
January 1, 1965
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
PHOTOTAXIS IN EUGLENA: BIOCHEMICAL ASPECTS.
None
Date:
October 31, 1972
Creator:
Tollin, Gordon
Object Type:
Report
System:
The UNT Digital Library
BIOLOGICAL POLYMERS RELATED TO CATECHOL. EPR AND IR STUDIES OF MELANIN, TANNIN, LIGNIN, HUMIC ACID AND HYDROXYQUINONES
None
Date:
January 1, 1964
Creator:
Steelink, Cornelius & Tollin, Gordon
Object Type:
Report
System:
The UNT Digital Library
LIGHT-INDUCED SINGLE ELECTRON TRANSFER REACTIONS BETWEEN CHLOROPHYLL $alpha$ AND QUINONES IN SOLUTION. III. ABSOLUTE QUANTUM YIELDS AS A FUNCTION OF TEMPERATURE AND SOLVENT
None
Date:
January 1, 1963
Creator:
Tollin, Gordon; Chatterjee, Kumar K. & Green, Gisele
Object Type:
Report
System:
The UNT Digital Library
DISTURBANCES IN THE EGCR CORE
None
Date:
June 3, 1965
Creator:
Domer, R.G.
Object Type:
Report
System:
The UNT Digital Library
Technical Progress Report.
None
Date:
January 1, 1970
Creator:
Krishna, V. G.
Object Type:
Report
System:
The UNT Digital Library
MOLECULAR COMPLEXES OF FLAVINS AND PHENOLS. II. FACTORS INFLUENCING SPECTRA AND STABILITY
None
Date:
January 1, 1964
Creator:
Fleischman, Darrell E. & Tollin, Gordon
Object Type:
Report
System:
The UNT Digital Library
A Liquid-Scintillation Technique for the Radioassay of {sup 45}Ca
None
Date:
November 1, 1967
Creator:
Hardcastle, J. E.; Hannapel, R. J. & Fuller, W. H.
Object Type:
Article
System:
The UNT Digital Library
THE LUMINESCENCE OF OXINES AND METAL OXINATES
None
Date:
January 1, 1964
Creator:
Bhatnagar, D C & Forster, L S
Object Type:
Report
System:
The UNT Digital Library
The Ornl Gcr-3, a 750-MW(e) Gas-Cooled Clad-Fuel Reactor Power Plant. A Joint Design Study
ABS>An advanced, gas-cooled, clad-fuel reactor power plant to generate 750 Mw of electricity was designed as a study of the potential capability of that system. The graphitemoderated reactor generates 1908 Mw of heat in 1062 fuel channels 21 ft long for a power density of 5.5 kw/liter. Gas temperatures entering and leaving the reactor are 574 and 1150 deg F, respectively, operating at 420 psia. Steam at 2415 psia and 950 deg F with reheat to 1000 deg F drives a 763-Mw(e) turbogenerator and also four 31,000-hp blower drive turbines and the boiler feed pumps. Net thermal efficiency of the plant is 39.4%. Estimated direct cost of construction is 0,267,000, or 7 per kilowatt net electric output. Fuel-cycle costs at 20,000 Mwd per metric ton of uranium are 1.46 mills/ kwhr, operating and maintenance costs are 0.39 mill, and fixed charges range from 1.80 to 4.65 mills, depending on method of financing. Total power generation costs at an 80% load factor range from 3.65 to 6.50 mills/kwhr. (auth)
Date:
February 1, 1963
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
SUMMARY OF DESIGN OF EGCR REACTOR COOLANT SYSTEM
None
Date:
July 19, 1965
Creator:
Beasley, E.G.
Object Type:
Report
System:
The UNT Digital Library
MOLECULAR COMPLEXES OF FLAVINS AND PHENOLS. I. ABSORPTION SPECTRA AND PROPERTIES IN SOLUTION
None
Date:
January 1, 1964
Creator:
Fleischman, Darrell E. & Tollin, Gordon
Object Type:
Report
System:
The UNT Digital Library
KINETICS OF SECONDARY REACTIONS IN IRRADIATED POLYETHYLENE. Final Report, May 1, 1966--August 31, 1967.
None
Date:
January 1, 1968
Creator:
Bodily, David M.
Object Type:
Report
System:
The UNT Digital Library