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in subjects: "Temperature Distribution"

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Hydrology and geochemistry of thermal ground water in southwestern Idaho and north-central Nevada

The study area occupies about 14,500 square miles in southwestern Idaho and north-central Nevada. Thermal ground water occurs under artesian conditions, in discontinuous or compartmented zones, in igneous or sedimentary rocks of Tertiary age. Ground-water movement is generally northward. Temperatures of the ground water range from about 30/sup 0/ to more than 80/sup 0/C. Chemical analyses of water from 12 wells and 9 springs indicate that nonthermal waters are a calcium bicarbonate type; therma… more

Date: December 1, 1980

Creator: Young, H. W. & Lewis, R. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Coarse-node computations with an adaptive node structure

The analysis with COMMIX of liquid metal reactor (LMR) intermediate heat exchanger (IHX) transients that are characterized by low flows, and especially imbalanced low flows, shows that if a coarse-node structure is used the predicted temperatures are significantly different than those given by a fine-node structure. If a fine-node structure is used, for problems that involve a large part of the plant, the computation time becomes excessive. This paper presents an improved version of an adaptive… more

Date: January 1, 1988

Creator: Tzanos, C.P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Northern Arizona Basin Study (NABS), 1989

An experiment was conducted to better understand a frequent layer of northwest winds found in the Northern Arizona region. This layer has been observed most often in winter near the surface at Page, Arizona, and often opposes larger scale upper level west winds. The results of this experiment improved both the temporal and the down-valley spatial resolution of the flow structure in this region during winter. 11 refs., 9 figs.

Date: January 1, 1989

Creator: Porch, W.M.; Clements, W.E. & Grant, T.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Kilowatt Isotope Power System: Test Procedure for the Radiator Long and Short Panels. 77-KIPS-111

The objective of this document is to outline the procedure for conducting development tests of sections of the KIPS space radiator. The results of these tests will be utilized to determine the final design and anticipated performance characteristics of the full size ground demonstration system (GDS) radiator. This procedure is applicable to the tests planned for the short panel radiator test assembly (KIPS104000-009) and for the long panel radiator test assembly (KIPS104000-019). The test data … more

Date: January 1, 1977

Item Type: Report

Partner: UNT Libraries Government Documents Department

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RODCON: a finite difference heat conduction computer code in cylindrical coordinates

RODCON, a finite difference computer code, was developed to calculate the internal temperature distribution of the fuel rod simulator (FRS) for the Core Flow Test Loop (CFTL). RODCON solves the implicit, time-dependent forward-differencing heat transfer equation in 2-dimensional (Rtheta) cylindrical coordinates at an axial plane with user specified radial material zones and surface conditions at the FRS periphery. Symmetry of the boundary conditions of coolant bulk temperatures and film coeffic… more

Date: September 16, 1980

Creator: Conklin, J. C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

RLPORINC: the RELAP4/MOD5 interface to ORINC

The Oak Ridge Inverse code, ORINC, calculates the temperature distribution in an electric core pin from internal temperatures and the conditions in the surrounding environment. While the internal temperatures can be obtained from thermocouples in the Thermal Hydraulic Test Facility, the needed environmental conditions cannot be determined as directly from experimental data. However, this information can be determined from a modified version of the Reactor Linearized Analysis Program, RELAP. In … more

Date: January 10, 1978

Creator: Cliff, S.B.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

ICRF heating on TFTR

The objectives of the ICRF heating program on TFTR are discussed along with a summary of the progress made to date towards achieving those goals. A more detailed analysis of experimental observations of ICRF sawtooth stabilization is given along with a comparison of the data to a theoretical model based on energetic ion stabilization of m=1 kink instabilities. A qualitative correlation is observed between the experimental observations and model predictions, but further development of the theory… more

Date: January 1, 1991

Creator: Phillips, C. K.; Fredrickson, E.; Hammett, G.; Hosea, J.; McGuire, K.; Stevens, J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Time series analysis of reactor thermocouple data. [LMFBR]

Time-series analysis techniques are applied to nuclear reactor thermocouple data to investigate coolant temperatures measured within the fueled test assembly. The coolant temperature distribution within a fuel assembly affects the length of time a fuel assembly may be operated in a power reactor and, therefore, is an important economic consideration in the design of reactor fuel systems. Frequency-domain signal conditioning techniques were used to reveal the smoothly varying thermocouple signal… more

Date: April 10, 1980

Creator: Devary, J.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Highest temperatures recorded by the Oklo mineral phase assemblages and rock textures

Biotite-bearing pelitic phase assemblages are observed in reactor zones 2 and 5 and up to at least 4 m outside of zone 2, indicating a minimum temperature in these regions of about 400/sup 0/C. Rock textures suggest that still higher temperatures may have been reached within the reactors.

Date: January 1, 1977

Creator: Vidale, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Molten salt freeze seal. Final report

This report documents the results of the testing performed at Sandia National Laboratory, Albuquerque, New Mexico, on the applicability of a sodium freeze seal type valve stem in a molten salt environment. The freeze seal tests consisted of cycling the valve stem at set temperature intervals, checking the temperature distribution for freeze plug location, and verifying the actuator forces. In addition to the test results, this report also documents the engineering analysis and other tasks perfo… more

Date: August 1, 1985

Creator: Corugedo, J.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Bootstrap and fast wave current drive for tokamak reactors

Using the multi-species neoclassical treatment of Hirshman and Sigmar we study steady state bootstrap equilibria with seed currents provided by low frequency (ICRF) fast waves and with additional surface current density driven by lower hybrid waves. This study applies to reactor plasmas of arbitrary aspect ratio. IN one limit the bootstrap component can supply nearly the total equilibrium current with minimal driving power (< 20 MW). However, for larger total currents considerable driving power… more

Date: September 1, 1991

Creator: Ehst, D.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Computational and experimental methods for enclosed natural convection

Two computational procedures and one optical experimental procedure for studying enclosed natural convection are described. The finite-difference and finite-element numerical methods are developed and several sample problems are solved. Results obtained from the two computational approaches are compared. A temperature-visualization scheme using laser holographic interferometry is described, and results from this experimental procedure are compared with results from both numerical methods.

Date: October 1, 1977

Creator: Larson, D.W.; Gartling, D.K. & Schimmel, W.P. Jr.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Dynamic performance of packed-bed dehumidifiers: experimental results from the SERI desiccant test loop

Discussed are the design and construction of a desiccant test loop and results of tests with a silica-gel-packed bed. The test loop consists of two centrifugal fans, two duct heaters, a steam humidifier, 24.4m (80 ft) of 30-cm (12-in.) circular duct, instrumentation, and a test section. The loop is capable of testing adsorption and desorption modes at flow rates up to 0.340 kg/s (600 scfm) and at regeneration temperatures up to 120/sup 0/C (248/sup 0/F). Tests of a 74-cm(29-in.)-diameter, 3.2-c… more

Date: August 1, 1982

Creator: Kutscher, C F & Barlow, R S

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Alfven wave stability in D-III-D

Within the framework of the global Alfven eigenmode theory in a cylindrical background plasma, I examine the excitation of global Alfven eigenmodes by intense neutral beam injection in the D III-D tokamak operating at General Atomics. I have considered two separate sets of experimental conditions, a low power'' set of cases using 10MW of hydrogen beams, and a high power'' shot of 20MW of deuterium beams. My results are particularly sensitive to the background density profile. For parabolic back… more

Date: September 1, 1989

Creator: Campbell, R.B. (Lawrence Livermore National Lab., CA (USA)) & Samec, T.K. (TRW, Inc., Redondo Beach, CA (USA))

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Design improvements for cyclic injection molds. Final report

No Description Available.

Date: May 1, 1975

Creator: Bronson, M.J. & Bruegge, D.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Analysis of solar collector array systems using thermography

The use of thermography to analyze large solar collector array systems under dynamic operating conditions is discussed. The research has focused on thermographic techniques and equipment to determine temperature distributions, flow patterns, and air blockages in solar collectors. The results of this extensive study, covering many sites and types of collectors, illustrate the capabilities of infrared analysis as an analysis tool and operation and maintenance procedure when applied to large array… more

Date: January 1, 1980

Creator: Eden, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Three-dimensional temperature history of a multipass filled weldment. Part 2. [HEATINGS]

Computer simulation of the three-dimensional temperature history in a multipass filled weldment was attempted by modifying a transient heat transfer code, HEATING5. The model includes temperature-dependent physical parameters, radiation and convection heat losses, turbulent and laminar convection in the molten pool, and variable arc velocity, intensity, and weld geometry. The model requires approximately 28 CPU min to simulate one second of welding. 15 figures, 8 tables.

Date: December 21, 1976

Creator: Pinkowish, J.A. & Whitman, P.K.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Sensitivity calculations for low heat generating defense waste repository temperatures

Repository temperatures were calculated for Savannah River wastes by using both two- and three-dimensional numerical schemes. The error introduced by using the simpler and more efficient two-dimensional models is less than the present uncertainties introduced by waste power generation and host rock properties. Waste canister temperatures were found to be relatively insensitive to geometric asymmetry and model detail.

Date: January 1, 1980

Creator: Tennant, M H

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Interaction of bootstrap-current-driven magnetic islands

The formation and interaction of fluctuating neoclassical pressure gradient driven magnetic islands is examined. The interaction of magnetic islands produces a stochastic region around the separatrices of the islands. This interaction causes the island pressure profile to be broadened, reducing the island bootstrap current and drive for the magnetic island. A model is presented that describes the magnetic topology as a bath of interacting magnetic islands with low to medium poloidal mode number… more

Date: October 1, 1991

Creator: Hegna, C. C. & Callen, J. D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Heat-flow reconnaissance of the Gulf Coastal Plain

Most of the 46 new values of heat flow determined for the Gulf Coastal Plain are in the low to normal range, but heat-flow values averaging 1.8 heat-flow unit (HFU) were obtained in Claiborne, Ouachita, and Union parishes, Louisiana. Moreover, a zone of relatively high heat-flow values and steep thermal gradients (35 to 46/sup 0/C/km) extends from northern Louisiana into southwestern Mississippi. Also near Pensacola, Florida, temperatures of 50/sup 0/C at 1-km depth have been extrapolated from … more

Date: April 1, 1982

Creator: Smith, D. L. & Shannon, S. S. Jr.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Effects of fill gas composition and pellet eccentricity. [BWR]

Data and an analysis are presented showing that when the operating pellet-cladding gap size of contemporary UO/sub 2/ fuel rods is carefully considered, the gap conductances are closely proportional to the thermal conductivities of the fill gases. Pellet-cladding gap eccentricity is shown to raise the gap conductance appreciably in cases of high thermal gradients across the gap. Ignoring the azimuthal heat flow can lead to an underestimation of the thermal time constant of the rod, resulting in… more

Date: July 1, 1977

Creator: Williford, R.E. & Hann, C.R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Particle balance in a TFTR supershot

Particle balance in a TFTR supershot is studied self-consistently. The TRANSP analysis code is used to model plasma parameters within the last closed flux surface, deriving time-dependent plasma profiles from measurements. The poloidal flux surfaces are derived using TRANSP and an equivalent-filament analysis code which distributes axisymmetric currents to match measurements of the poloidal field and flux and the total plasma current. The plasma in the edge and scrape off regions are modeled du… more

Date: January 1, 1992

Creator: Budny, R.V.; Coster, D.; Stotler, D.; Bell, M.G.; Janos, A.C. & Owens, D.K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

El Paso Electric photovoltaic-system analyses

Four analyses were performed on the Newman Power Station PV system. Two were performed using the Photovoltaic Transient Analysis Program (PV-TAP) and two with the SOLCEL II code. The first was to determine the optimum tilt angle for the array and the sensitivity of the annual energy production to variation in tilt angle. The optimum tilt angle was found to be 28/sup 0/, and variations of 2/sup 0/ produce losses of only 0.06% in the annual energy production. The second analysis assesses the powe… more

Date: May 1, 1982

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Steady-state temperature and stress distributions of a proposed LAMPF pyrolytic graphite pion production target

Two target configurations, suitable for the Clinton P. Anderson Meson Physics Facility (LAMPF) pion production sites, are analyzed for maximum temperatures and stresses to be experienced at LAMPF's design current (800-MeV protons at 1-mA average current). A steady-state analysis is performed using the computer code TSAAS. The pulsed nature of the beam is not considered (6 percent duty). Both targets are pyrolytic graphite. One is cooled by water flowing through copper tubes bonded to the graphi… more

Date: November 1, 1977

Creator: Lindquist, L.O. & Scarbrough, E.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department