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43,228 Matching Results

Start Over Year 1979

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(open access)

Parameters affecting radionuclide migration in geologic media

Adsorption of several nuclides (Sr, Tc, Cs, Ba, Ce, Eu) on tuff, monzonite, and argillite was studied experimentally. 3 tables. (DLC)

Date: December 31, 1979

Creator: Erdal, B.R.; Bayhurst, B.P. & Daniels, W.R.

Object Type: Article

System: The UNT Digital Library

(open access)

Performance analyses of Elmo Bumpy Torus plasmas and plasma support systems

The development and applcation of the OASIS Code (Operational Analysis of ELMO Bumpy Torus Support and Ignition Systems) for the study of EBT device and plasma performance are presented. The code performs a time-independent, zero-dimensional self-consistent calculation of plasma and plasmasupport systems parameters for the physics and engineering of EBT devices. The features of OASIS modeling for the EBT plasma include: (1) particle balance of the bulk toroidal and electron ring plasma components for experimental (H-H, D-D, He-He etc.) as well as reactor (D-T) devices; (2) energy balance in the bulk and ring plasmas for externally heated or ignition devices; (3) alpha particle effects for reactor devices; (4) auxiliary heating effects, including microwave (ECRH), RF heating (e.g., ICRH), and neutral beam methods; and (5) ignition conditions, including fusion power, alpha power and neutron wall loading. The performance studies using OASIS focussed on variation in plasma and device size and on microwave input power and frequency. An additional study was performed to determine the characteristics of an EBT reactor proof-of-principle device operated with a deuterium-tritium plasma. Sensitivity studies were performed for variation in the input microwave power sharing fractions and the dependence of the bulk n tau scaling law on bulk …

Date: December 31, 1979

Creator: Fenstermacher, M. E.

Object Type: Report

System: The UNT Digital Library

(open access)

Perry Daily Journal (Perry, Okla.), Vol. 86, No. 281, Ed. 1 Monday, December 31, 1979

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.

Date: December 31, 1979

Creator: Watson, Milo W.

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

Petrology of tuff units from the J-13 drill site, Jackass Flats, Nevada

The J-13 drill hole, located in Jackass Flats, Nevada Test Site, has penetrated 125 m of alluvium and 932 m of tuff. Most of the tuff deposits consist of welded tuffs; glass phases in the tuffs have been replaced by authigenic minerals, mainly K-feldspar, silica, and zeolites. The zonation of authigenic minerals, with depth, indictes that alteration of glass phases and filling of vugs occurred during welding and compaction of tuff units soon after deposition and by interaction with groundwater. Zonation of authigenic minerals in tuff deposits at Jackass Flats is similar to mineral zonation in tuffs elsewhere at the Nevada Test Site and in tuff deposits of west Texas. All appear to have been developed by leaching of glass phases and deposition of authigenic minerals in open hydrologic systems. 10 figures, 38 tables.

Date: December 31, 1979

Creator: Heiken, G. H. & Bevier, M. L.

Object Type: Report

System: The UNT Digital Library

[Photograph 2012.201.B0102.0485]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mrs. John R. Bozalis and Mr. Pat Wilkinson model the western attire they will be wearing during the two parties preceding the opening of the Decorators' showhouse."

Date: December 31, 1979

Creator: Longstreath, David

Object Type: Photograph

System: The Gateway to Oklahoma History

[Photograph 2012.201.B0106.0156]

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Although not yet open to vehicle traffic, the new Shields Avenue bridge over the North Canadian River is landing strip and rest stop for a small flock of pigeons, seen on the railing and huddling on the beams below."

Date: December 31, 1979

Creator: Klock, Roger

Object Type: Photograph

System: The Gateway to Oklahoma History

(open access)

Preliminary market analysis for customer side of the meter thermal-energy storage

An examination is made of the potential market size for thermal energy storage space heating, water heating, and air conditioning in the residential and commercial sector. It is concluded that a significant market for TES could develop over the next 20 years; the analysis considers the electric utility perspective, the perspective, and the expected market in detail. (MCW)

Date: December 31, 1979

Creator: unknown

Object Type: Report

System: The UNT Digital Library

(open access)

Projection of Favorable Gas-Producting Areas From Paleoenvironmental Data

Paleoenvironmental biofacies analysis of recent wells in dark Devonian shales in the Applachian Basin has shown that these facies can be projected to areas with no control points. In particular, the facies distribution in Perry County, Kentucky, were found to be precisely those that were predicted earlier from biofacies and organic geochemical data from the VA-1 well in Wise County, Virginia, and the KY-2 well in Martin County, Kentucky. This demonstrates the importance of these data in assessing the volume of gas in the shale throughout the basin as well as in selecting future test sites. The recent biofacies and geochemical work together with a review of the tectonics of the basin have contributed to an evolving interpretation of the geologic control of the biofacies. While a marine environment persisted throughout the Upper Devonian over the Applachian and Illinois Basin (and probably the Michigan Basin), dynamic emergent areas controlled an intermittent introduction of large amounts of organic matter. Large amounts of non-marine organic matter were periodically transported in the basin from a dynamic source province to the Southeast; massive "blooms" of Tasmanites intermittently spread both east and west from the edges of the emerging Cincinnati Arch. At times one or …

Date: December 31, 1979

Creator: Zielinski, R.E.; Dixon, J. A.; McIver, R. D. & Reaugh, A. B.

Object Type: Report

System: The UNT Digital Library

(open access)

Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 66, No. 91, Ed. 1 Monday, December 31, 1979

Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.

Date: December 31, 1979

Creator: Lake, Charles S.

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

Sensitivity study on the parameters of the regional hydrology model for the Nevada nuclear waste storage investigations

Statistical methodology has been applied to the investigation of the regional hydrologic systems of a large area encompassing the Nevada Test Site (NTS) as a part of the overall evaluation of the NTS for deep geologic disposal of nuclear waste. Statistical techniques including Latin hypercube sampling were used to perform a sensitivity analysis on a two-dimensional finite-element code of 16 geohydrologic zones used to model the regional ground-water flow system. The Latin hypercube sample has been modified to include correlations between corresponding variables from zone to zone. From the results of sensitivity analysis it was found that: (1) the ranking of the relative importance of input variables between locations within the same geohydrologic zone were similar, but not identical; and (2) inclusion of a correlation structure for input variables had a significant effect on the ranking of their relative importance. The significance of these results is discussed with respect to the hydrology of the region.

Date: December 31, 1979

Creator: Iman, R. L.; Davenport, J. M.; Waddell, R. K.; Stephens, H. P. & Leap, D. I.

Object Type: Article

System: The UNT Digital Library

(open access)

Status of evaluation of tuff in southern Nevada for geologic disposal of high level nuclear wastes

Siliceous tuff in southern Nevada occurs in a complex and locally active geological environment. Regional thrust faulting, Basin and Range faulting, and present-day seismicity complicate exploration and site characterization activities. The inherent variability of tuff and the complexity of caldera complexes also complicate siting efforts, but may serve to enhance long-term containment. Time--space trends of silicic volcanism are moderately well-established, while those of recent basaltic volcanism are not. At present, the final consequences for repository siting of the geologic complexities described in this paper are not known. Evidence from laboratory cation exchange measurements indicate that tuff and tuffaceous alluvium can serve as effective natural barriers to migration of radionuclides. This fact, coupled with multiple hydrologic barriers and long flow paths, as in the vicinity of the Nevada Test Site, might well result in tuff being a suitable medium for the safe long-term geologic disposal of nuclear wastes. Preliminary thermal modeling indicates the strong influence of varying assumptions regarding in situ fluid pressures and geothermal heat flux on acceptable initial areal power loadings.

Date: December 31, 1979

Creator: Lappin, A. R. & Crowe, B. M.

Object Type: Article

System: The UNT Digital Library

(open access)

Stephenville Empire-Tribune (Stephenville, Tex.), Vol. 111, No. 116, Ed. 1 Monday, December 31, 1979

Daily newspaper from Stephenville, Texas that includes local, state, and national news along with advertising.

Date: December 31, 1979

Creator: Doggett, Denver

Object Type: Newspaper

System: The Portal to Texas History

(open access)

Test results and supporting analysis of a near surface heater experiment in the Eleana Argillite

A preliminary evaluation of the in-situ thermomechanical response of argillite to heating was obtained from a near-surface heater test in the Eleana Formation, at the Nevada Test Site. The experiment consisted of a 3.8 kW, 3-m long x 0.3-m diameter electrical heater in a central hole surrounded by peripheral holes containing instrumentation to measure temperature, gas pressures, and vertical displacement. A thermal model of the experiment agreed well with experimental results; a comparison of measured and predicted temperatures indicates that some nonmodeled vertical transport of water and water vapor occurred near the heater, especially at early times. A mechanical model indicated that contraction of expandable clays in the argillite produced a region 1.5 to 2.0 m in radius, in which opening of preexisting joints occurred as a result of volumetric contraction. Results of thermal and mechanical modeling, laboratory property measurements, experimental temperature measurements, and post-test observations are all self-consistent and provide preliminary information on the in situ response of argillaceous rocks to the emplacement of heat-producing nuclear waste. 9 figures, 2 tables.

Date: December 31, 1979

Creator: McVey, D. F.; Lappin, A. R. & Thomas, R. K.

Object Type: Article

System: The UNT Digital Library

(open access)

Thermal and mechanical responses in the Conasauga and Eleana formations

Two near-surface heater experiments were performed in argillaceous rocks for the purpose of determining the suitability of this rock type for the disposal of heat producing nuclear waste. Site instrumentation included provisions for monitoring both the thermal and mechanical response of the formation. The mechanical behavior of argillaceous rocks was found to be complex and illustrates the necessity of incorporating the dehydration behavior of clays into existing models. The thermal response also reflected the effects of water. Even in the presence of considerable ground water, however, conduction remains the principal method of heat transfer, and computer codes using this assumption give a realistic picture of the in-situ formation behavior.

Date: December 31, 1979

Creator: Krumhansl, J. L. & Tyler, L. D.

Object Type: Article

System: The UNT Digital Library

(open access)

Thermal aspects of waste emplacement in layered tuffs

The thermal response of layered tuffs in Yucca Mountain at NTS to radwaste emplacement at 711 m depth (Bullfrog tuff) was analyzed. Three in-situ boiling criteria were examined. No boiling is predicted for any burial depth with power densities up to 150 kW/acre. Allowable powerdensities are plotted vs depth below 711 m for both HLW and spent fuels. (DLC)

Date: December 31, 1979

Creator: Bulmer, B.M. & Lappin, A.R.

Object Type: Article

System: The UNT Digital Library

(open access)

Thermophysical properties of rocks: a perspective on data needs, sources and accuracy

Recent emphasis on research in geologic isolation of nuclear wastes and geoenergy resource development has created a renewed demand for engineering thermophysical property data for rocks and other geologic materials at elevated pressures and temperatures. In contrast to fabricated engineering materials, with properties which can be specified, rocks used in engineering design are complex, naturally occurring materials having properties which must be characterized, rather than specified, for engineering studies. Much difficulty in measuring, reporting, and using thermophysical properties of rocks results from (1) rock inhomogeneity and anisotropy on both microscopic and macroscopic scales; (2) inclusion of pore fluids, such as water; and (3) measurement of laboratory properties under conditions quite different from those of in situ material. Because measurements on in situ materials are scarce, many analyses must depend on extrapolated values of uncertain accuracy. A survey of thermophysical property data available for geologic thermal transport studies indicates that caution must be taken to effectively match data abstracted from the literature with project objectives.

Date: December 31, 1979

Creator: Stephens, H.P. & Sinnock, S.

Object Type: Article

System: The UNT Digital Library