4,385 Matching Results

Search Results

Proceedings of the Third Post-Accident Heat Removal Information Exchange November 2-4, 1977, Argonne National Laboratory, Argonne, Illinois

Description: Papers presented at the third Post-Accident Heat Removal Information Exchange concerning heat distribution and criticality considerations, particulate-bed phenomena, pool heat transfer and melt-front phenomena, behavior of heated concrete and sodium-concrete interactions, design-related studies, gas bubbling and boiling effects, and materials interactions at high temperatures and experimental methods.
Date: 1978?
Creator: Baker, Louis, Jr.
Partner: UNT Libraries Government Documents Department

Instrumentation Observations from the U-Frame Lock of the Arkansas River Lock and Dam 5

Description: Report regarding analysis of a lock and dam in the Arkansas River. "The purpose of this study is to take 8 years of instrumentation data from Lock No. 5 and report it in such a manner that it can be used later in other studies, such as a finite element analysis. Included is a discussion of the quality of the data and a brief comparison of measured values with design cases for several soil-structure interaction cases" (p. 5).
Date: August 1978
Creator: Leach, Roy E.
Partner: UNT Libraries Government Documents Department

Precast Concrete Elements for Structures in Selected Theaters of Operations

Description: Partial abstract: "The current state of the art of design, fabrication, and erection techniques of various prefabricated elements for concrete structures are reviewed. Included are precast concrete highway bridges, logging bridges, railway bridges, piles, culverts, pipes, floating structures, and field fortifications. The structural properties, advantages, and disadvantages of various elements and systems are discussed."
Date: February 1978
Creator: McDonald, James E. & Liu, Tony C.
Partner: UNT Libraries Government Documents Department

Marysville Lake Hydrothermal Study: Report 2

Description: Partial abstract: "This study was conducted to determine the effect that the proposed Marysville Lake pump-storage hydropower (2250-mw power plant) project would have on downstream water temperatures. A one-dimensional numerical model was used for simulation and prediction of temperatures within and downstream of Marysville Lake. Two physical hydraulic models were used for study and description of the hydrodynamic response of the project. Information from the physical models was necessary to determine coefficients used by algorithms within the mathematical model."
Date: February 1978
Creator: Dortch, Mark S.
Partner: UNT Libraries Government Documents Department

Improvements for Murrells Inlet, South Carolina: Hydraulic Model Investigation

Description: Final report of a project for the improvement and stabilization of Murrells Inlet, near Myrtle Beach, South Carolina. A model study was performed to aid in preconstruction planning and design of structural solutions to the problem of providing a stabilized channel of sufficient depth and width with provisions for sand bypassing.
Date: April 1978
Creator: Perry, Frederick C., Jr.; Seabergh, William C. & Lane, Edgar F.
Partner: UNT Libraries Government Documents Department

A Review of the Physical and Engineering Properties of Raw and Retorted Oil Shales from the Green River Formation: Final Report

Description: "This report summarizes published geotechnical properties of raw and retorted oil shales from the Green River Formation. Basic physical properties including gradation, specific gravity and Atterberg limits and engineering properties including compaction, permeability, settlement, soundness, and strength are summarized and discussed. Where appropriate, conclusions are drawn about the suitability of retorted oil shales as a geotechnical construction material. Appendix A discusses three retorting processes used to extract oil from oil shale" (abstract, para. 2-3).
Date: March 1978
Creator: Snethen, Donald; Farrell, Warren J. & Townsend, Frank C.
Partner: UNT Libraries Government Documents Department

Effect of Backfill Property and Airblast Variations on the External Loads Delivered to Buried Box Structures

Description: Partial abstract: "The results of analytical studies are presented in which (i) the SAP IV elastic finite-element (FE) code was used to perform modal analyses for a rectangular structure in vacuo and embedded in different backfill materials, and (2) a series of dynamic and static two-dimensional (2D), plane-strain, FE, structure-medium interaction (SMI) code calculations were performed using the HONDO code."
Date: June 1978
Creator: Windham, Jon E. & Curtis, John O.
Partner: UNT Libraries Government Documents Department

Gyratory Shear Apparatus: Design, Testing Procedures, and Test Results on Undrained Sand

Description: This report describes a study to measure redistribution in sand due to cyclic shear and gyratory shear including descriptions of the apparatus and equipment, with shop drawings; test procedures; test results; and discussion of the study and findings.
Date: October 1978
Creator: Casagrande, Arthur & Rendon, Franklin
Partner: UNT Libraries Government Documents Department

State-of-the-Art for Assessing Earthquake Hazards in the United States: Report 11, Imagery in Earthquake Analysis

Description: Partial abstract: "Recent advances in the fields of remote sensing, engineering geology, seismology, and earthquake engineering have developed a need for a systematic comprehensive review of the basic principles and methods of applying remote sensing for evaluation of earthquake hazards and seismic risk. This paper responds to this need by reviewing basic concepts, summarizing essential, state-of-the-art knowledge of theory and instrumental methods, establishing procedures evaluations, and discussing representative case histories that illustrate earthquake hazard evaluations that are based on remote sensing analysis."
Date: December 1978
Creator: Glass, Charles E. & Slemmons, David B.
Partner: UNT Libraries Government Documents Department

Uranium Hydrogeochemical and Stream Sediment Reconnaissance of the Bozeman NTMS Quadrangle, Montana

Description: "This report describes work done in the Bozeman, Montana National Topographic Map Series (NTMS) quadrangle (1:250,000 scale) by the Hydrogeochemical and stream Sediment Reconnaissance (HSSR). The HSSR...is designed to identify areas having higher than normal concentrations of uranium in ground waters, surface waters, and water-transported sediments" (p. 1). In this project, 1251 water and 1536 sediment samples were collected from 1586 locations to test for uranium levels.
Date: November 1978
Creator: Bolivar, Stephen L.
Partner: UNT Libraries Government Documents Department

COMMUNITY DEVELOPMENT IN FRESHWATER MICROCOSMS

Description: Two cylindrical freshwater microcosms with a volume of 700 {ell} were maintained under controlled laboratory conditions for 190 days. The two microcosms were identical with regard to initial chemical composition and biological inocula, with the exceptions that in one microcosm (designated Tank 2) mosquitofish (Gambusia) and herbivorous catfish (Placostomas) were added. Three distinct communities developed in the tanks: (1) a phytoplankton-zooplankton assemblage and (2) two periphyton-zoobenthos communities associated with the sides and bottom of the tank, respectively. Community development and successional patterns were similar in both tanks. Major differences between the tanks involved timing of succession of the zooplankton and zoobenthos, attributable to predation by fish, principally Gambusia. A major drawback for these microcosms as use for experimental analogs such as lakes was a luxuriant periphyton growth which eventually overwhelmed the biomass of the system. The tanks displayed a degree of successional replicability, a large number of species, and a diversity of community development. Microcosms of this size could find use as experimental systems for higher level trophic manipulation and observation of life cycles not amenable to field studies.
Date: January 1, 1978
Creator: Rees, John T.
Partner: UNT Libraries Government Documents Department

Numerical Methods for a Porous Medium Equation

Description: The degenerate parabolic equation has been used to model the flow of gas through a porous medium. Error estimates for continuous and discrete time finite element procedures to approximate the solution of this equation are proved and a new regularity result is described.
Date: August 1978
Creator: Rose, M. E.
Partner: UNT Libraries Government Documents Department

Photogeologic Interpretation of the Baltazor-McGee Geothermal Prospects, Humboldt County, Nevada

Description: GeothermEx, Inc. was asked by Earth Power Corporation in October 1977 to perform a photogeologic study of the Baltazor and McGee geothermal prospects, northern Humboldt County, Nevada and southern Harney County, Oregon (figure 1), as a means of evaluating the geothermal reservoir and heat source at these prospects. Work began in October and was completed in December 1977. It included a brief field reconnaissance, to clarify particular points. This report summarizes findings and offers interpretations of structural features, stratigraphy, recent tectonic events, and subsurface conditions.
Date: February 1, 1978
Creator: Gardner, Murray C. & Koenig, James B.
Partner: UNT Libraries Government Documents Department

MECHANICAL AND THERMAL DESIGN CONSIDERATIONS FOR RADIOACTIVE WASTEREPOSITORIES IN HARD ROCK

Description: This report is one of a series documenting the results of the Swedish-American cooperative research program in which the cooperating scientists explore the geological, geophysical, hydrological, geochemical, and structural effects anticipated from the use of a large crystalline rock mass as a geologic repository for nuclear waste. This paper is broken down into the following 2 parts: (1) An appraisal of hard rock for potential underground repositories of radioactive waste; and (2) In situ heating experiments in hard rock--Their objectives and design.
Date: October 1, 1978
Creator: Cook, N.G.W. & Witherspoon, P.A.
Partner: UNT Libraries Government Documents Department

FULL-SCALE AND TIME-SCALE HEATING EXPERIMENTS AT STRIPA:PRELIMINARY RESULTS

Description: Two full-scale heating experiments and a time-scale heating experiment have recently been started in grainite 340 meters below surface. The purpose of the full-scale heating experiments is to assess the near-field effects of thermal loading for the design of an underground repository of nuclear wastes. That of the time-scale heating experiments is to obtain field data of the interaction between heaters and its effect don the rock mass during a period of about two years, which corresponds to about twenty years of full-scale operation. Geological features of the rock around each experiment have been mapped carefully, and temperatures, stresses and displacements induced in the rock by heating have been calculated in advance of the experiments. Some 800 different measurements are recorded at frequent intervals by a computer system situated underground. These data can be compared at any time with predictions made earlier on video display units underground.
Date: December 1, 1978
Creator: Cook, Neville G.W. & Hood, Michael.
Partner: UNT Libraries Government Documents Department

LONG TERM FILE MIGRATION - PART II: FILE REPLACEMENT ALGORITHMS

Description: The steady increase in the power and complexity of modern computer systems has encouraged the implementation of automatic file migration systems which move files dynamically between mass storage devices and disk in response to user reference patterns. Using information describing thirteen months of text editor data set file references, (analyzed in detail in the first part of this paper), they develop and evaluation algorithms for the selection of files to be moved from disk to mass storage. They find that algorithms based on both the file size and the time since the file was last used work well. The best realizable algorithms tested condition on the empirical distribution of the times between file references. Acceptable results are also obtained by selecting for replacement that file whose size times time to last reference is maximal. Comparisons are made with a number of standard algorithms developed for paging, such as Working Set. Sufficient information (parameter values, fitted equations) is provided that our algorithms may be easily implemented on other systems.
Date: October 1, 1978
Creator: Jay Smith, Alan
Partner: UNT Libraries Government Documents Department

Geothermal Sourcebook, Section 2.0 - Plant Control (Draft)

Description: This Section discusses (1) requirements for control of an individual power plant for both base loaded or load following plants, (2) operations during upset conditions, and (3) the degree of automation which may be applicable to a geothermal power plant.
Date: April 10, 1978
Partner: UNT Libraries Government Documents Department

AN ANALYSIS OF THE MEASURED VALUES FOR THE STATE OF STRESS IN THEEARTH'S CRUST

Description: The state of stress in the crust of the earth is of great fundamental and practical significance. No totally satisfactory method for measuring the complete state of stress has been devised yet. Despite this, many efforts have been made to measure this state of stress at different locations. From a compilation of many of the results, fifty which yielded the complete state of stress and in which one of the principal stresses is vertical, have been selected for a statistical analysis in an endeavor to define the nature of the state of stress in the crust. These data have been analyzed as a whole, and divided into three groups depending upon whether the vertical stress is the maximum, minimum or intermediate principal stress. Linear regression analyses of the values of half the maximum stress difference as a function of half the sum of the maximum and minimum principal stresses have been made. The correlation coefficients for these fits are 0.786 for the data as a whole and 0.848, 0.790 and 0.383 for each of the groups. Values of the coefficient of sliding friction between blocks of rock comprising the crust, interpreted from the slopes of these lines, ranged from 0.625 (for those measurements where the vertical stress is the maximum principal stress) through 0.427 (for those cases where the vertical stress is the minimum principal stress), to 0.220 (for those cases where vertical stress is the intermediate principal stress). The 98 percent confidence limits for these values lie within +19.4 percent - 16.6 percent.
Date: August 1, 1978
Creator: Jamison, Dennis B. & Cook, Neville G.W.
Partner: UNT Libraries Government Documents Department

Personal Flotation Devices Research: Phase 2

Description: Abstract: Research on personal flotation devices (PFDs) is reported in three volumes.
Date: January 1978
Creator: Doll, T.; Pfauth, M.; Gleason, J.; Cohen, S.; Stiehl, C.; Giuntini, R. et al.
Partner: UNT Libraries Government Documents Department