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  Partner: UNT Libraries Government Documents Department
 Decade: 1980-1989
Acute Toxicity and Bioaccumulation of Chloroform to Four Species of Freshwater Fish

Acute Toxicity and Bioaccumulation of Chloroform to Four Species of Freshwater Fish

Date: August 1, 1980
Creator: ,
Description: Acute toxicity of chloroform to four species of freshwater fish was studied in flow-through 96-hr toxicity tests. Chloroform is toxic to fish in the tens of parts per million, a concentration well above that which would be expected to be produced under normal power plant chlorination conditions. Investigations of acute toxicity of chloroform and the bioaccumulation of chlorinated compounds in tissues of fish revealed differences in tolerance levels and tissue accumulations. Mean 96-hr LC{sub 50}s for chloroform were 18 ppm for rainbow trout and bluegill, 51 ppm for largemouth bass and 75 ppm for channel catfish. Mortalities of bluegill and largemouth bass occurred during the first 4 hr of exposure while rainbow trout and channel catfish showed initial tolerance and mortalities occurred during the latter half of the 96-hr exposure. Rainbow trout had the highest level of chloroform tissue accumulation, 7 {micro}g/g tissue, catfish the second highest, 4 {micro}g/g tissue, followed by bluegill and largemouth bass which each accumulated about 3 {micro}g/g tissue. Accumulation of chloroform was less than one order of magnitude above water concentrations for all species.
Contributing Partner: UNT Libraries Government Documents Department
Chronic Effects of Chlorination By-Products on Rainbow Trout, Salmo gairdneri

Chronic Effects of Chlorination By-Products on Rainbow Trout, Salmo gairdneri

Date: November 1, 1980
Creator: ,
Description: Rainbow trout were exposed to by-products of low-level water chlorination for several months in two separate experiments. In each test 2400 juvenile rainbow trout (Salmo gairdneri) were reared under chlorination conditions designed to simulate those of a power plant. Objectives were to determine effects of long term exposure to provide samples for tissue analysis of chlorination byroducts. No significant difference in fish condition factors was found between the test groups and controls, neither was there an apparent effect on mortality. Background levels of chloroform were found in all fish, but there was no evidence of an increased amount of chloroform or other chlorination by-products resulting from chronic low level exposure to chlorination by-products.
Contributing Partner: UNT Libraries Government Documents Department
Mathematical Simulation of Sediment and Radionuclide Transport in Surface Waters

Mathematical Simulation of Sediment and Radionuclide Transport in Surface Waters

Date: April 1, 1981
Creator: ,
Description: The study objective of "The Mathematical Simulation of Sediment and Radionuclide Transport in Surface Waters" is to synthesize and test radionuclide transport models capable of realistically assessing radionuclide transport in various types of surface water bodies by including the sediment-radionuclide interactions. These interactions include radionuclide adsorption by sediment; desorption from sediment into water; and transport, deposition, and resuspension of sorbed radionuclides controlled by the sediment movements. During FY-1979, the modification of sediment and contaminant (radionuclide) transport model, FETRA, was completed to make it applicable to coastal waters. The model is an unsteady, two-dimensional (longitudinal and lateral) model that consists of three submodels (for sediment, dissolved-contaminant, and particulate-contaminant transport), coupled to include the sediment-contaminant interactions. In estuaries, flow phenomena and consequent sediment and radionuclide migration are often three-dimensional in nature mainly because of nonuniform channel cross-sections, salinity intrusion, and lateral-flow circulation. Thus, an unsteady, three-dimensional radionuclide transport model for estuaries is also being synthesized by combining and modifying a PNL unsteady hydrothermal model and FETRA. These two radionuclide transport models for coastal waters and estuaries will be applied to actual sites to examine the validity of the codes.
Contributing Partner: UNT Libraries Government Documents Department
A Measurement Control Program for Nuclear Material Accounting

A Measurement Control Program for Nuclear Material Accounting

Date: June 1, 1980
Creator: ,
Description: A measurement control program for nuclear material accounting monitors and controls the quality of the measurements of special nuclear material that are involved in material balances. The quality is monitored by collecting data from which the current precision and accuracy of measurements can be evaluated. The quality is controlled by evaluations, reviews, and other administrative measures for control of selection or design of facilities. equipment and measurement methods and the training and qualification of personnel who perform SNM measurements. This report describes the most important elements of a program by which management can monitor and control measurement quality.
Contributing Partner: UNT Libraries Government Documents Department
Monitoring the Random Errors of Nuclear Material Measurements

Monitoring the Random Errors of Nuclear Material Measurements

Date: June 1, 1980
Creator: ,
Description: Monitoring and controlling random errors is an important function of a measurement control program. This report describes the principal sources of random error in the common nuclear material measurement processes and the most important elements of a program for monitoring, evaluating and controlling the random error standard deviations of these processes.
Contributing Partner: UNT Libraries Government Documents Department
Research Program at Maxey Flats and Consideration of Other Shallow Land Burial Sites

Research Program at Maxey Flats and Consideration of Other Shallow Land Burial Sites

Date: March 1, 1981
Creator: ,
Description: The Maxey Flats research program is a multidisciplinary, multilaboratory program with the objectives to define the radiochemical and chemical composition of leachates in the burial trenches, define the areal distribution of radionuclides on the site and the factors responsible for this distribution, define the concentrations of radionuclides in vegetation both on and offsite and the uptake of radionuclides by representative agricultural crops, define the atmospheric pathways for radionuclide transport and the mechanisms involved, determine the subsurface migration rates of radionuclides and the chemical, physical, biological, and hydrogeological factors which affect this migration. and evaluate the engineering practices which influence the seepage of surface waters into the burial trenches. The program was initiated in 1979 and a research meeting was held at the Nuclear Regulatory Commission Headquarters on July 16, 1980, to report the research findings of each of the participating laboratories and universities. Important observations from the research are included in the Summary and the results reported for each of the research efforts are summarized in the individual reports that are combined to form this document.
Contributing Partner: UNT Libraries Government Documents Department
Training and Qualifying Personnel for Performing Measurements for the Control and Accounting of Special Nuclear Material

Training and Qualifying Personnel for Performing Measurements for the Control and Accounting of Special Nuclear Material

Date: November 1, 1980
Creator: ,
Description: This report presents general procedures for training and qualifying personnel who perform sampling and measurements used for special nuclear material accounting. Considerations for establishing training and qualifying procedures are discussed.
Contributing Partner: UNT Libraries Government Documents Department
A Visual Aesthetic Prediction Method for Use in Benefit-Cost Analysis

A Visual Aesthetic Prediction Method for Use in Benefit-Cost Analysis

Date: August 1, 1980
Creator: ,
Description: This report discusses the development of a method to predict landscape visual aesthetic changes caused by the siting of nuclear power plants. The methodology uses public perceptions as a measure of visual aesthetics. Individuals scored landscape photographs on a 0 to 50 visual aesthetic scale. The visual aesthetic scores were explained statistically by landscape characteristics, percent of the scene in clear, still water, and characteristics of the individuals scoring the photographs. Three visual aesthetic relationships were empirically estimated. The first is the relationship among group mean visual aesthetic scores and landscape characteristics. The second is the relationship among individual visual aesthetic scores, landscape characteristics, and the characteristics of the individuals who ranked the landscapes. These relationships were estimated using data from two regions in the U.S. and a diverse set of landscape photographs. The third relationship is among group mean visual aesthetic scores for landscapes with a visible nuclear power plant, landscape characteristics, and mean individual characteristics of the groups who scored the landscapes. This relationship was estimated using data from six regions in the U.S. and landscapes showing nuclear plants with a closed cycle cooling system. The statistical results are highly significant. Prediction validity test results indicate that the ...
Contributing Partner: UNT Libraries Government Documents Department
The Idaho Chemical Processing Plant Product Denitrator Upgrade

The Idaho Chemical Processing Plant Product Denitrator Upgrade

Date: May 1, 1982
Creator: /A, N
Description: The upgrade and redesign of a fluidized-bed denitrator for production of uranium trioxide from uranyl nitrate solution is discussed. The success of the project in improving process efficiency and personnel safety is also addressed based on subsequent operation.
Contributing Partner: UNT Libraries Government Documents Department
A Demonstration of the Constructibility of a Precast Concrete Stay-in-Place Forming System for Lock Wall Rehabilitation

A Demonstration of the Constructibility of a Precast Concrete Stay-in-Place Forming System for Lock Wall Rehabilitation

Date: December 1987
Creator: ABAM Engineers Incorporated
Description: Report describing a demonstration to evaluate the feasibility of the stay-in-place forming system to rehabilitate damaged lock walls as an alternative to the risk and investment of undertaking full-scale lock rehabilitiation.
Contributing Partner: UNT Libraries Government Documents Department
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