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A study of steady-state steam-water counterflow in porous media

Description: Vapor-liquid counterflow in porous media arises in processes such as heat pipes, oil recovery and geothermal systems. Previous studies analysed these phenomena in separate contexts. This paper presents a unified description from which previous models result as limiting cases. The analysis includes capillarity, heat conduction, and Kelvin effects. The importance of each term to various processes is examined. Significantly, it is found that the critical heat flux is not constant but increases wit… more
Date: February 1, 1990
Creator: Satik, C.; Parlar, M. & Yortsos, Y.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

HRT-CHEMICAL PLANT RUN 21 SUMMARY

Description: The multiple hydroclone system removed l83 grams of corrosion product solids in l814 hours of operation during reactor run 2l. The low removal rate was attributed to plugging of multiclone feed ports that presumably occurred during the latter part of run 20. After modifications to the reactor core and removal of the multiclone unit at the end of run 21, the reactor core was backflushed with the flow direction in the core loop reversed. During this period, the single hydroclone removed 205 grams… more
Date: February 12, 1962
Creator: Yarbro, O.O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MININR: a geochemical computer program for inclusion in water flow models - an application study

Description: MININR is a reduced form of the computer program MINTEQ which calculates equilibrium precipitation/dissolution of solid phases, aqueous speciation, adsorption, and gas phase equilibrium. The user-oriented features in MINTEQ were removed to reduce the size and increase the computational speed. MININR closely resembles the MINEQL computer program developed by Westall (1976). The main differences between MININR and MINEQL involve modifications to accept an initial starting mass of solid and necess… more
Date: February 1, 1984
Creator: Felmy, A. R.; Reisenauer, A. E.; Zachara, J. M. & Gee, G. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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(Study of flow properties of wet solids using laser induced photochemical anemometry)

Description: Research continues on the flow properties of wet solids. During this period we have made: progress in the analysis of the accuracy of the technique, progress in firming the foundations of LIPA for Solid-Liquid Mixtures, progress in the construction of better prototype skimmers, continued progress in chemically manufacturing both more red europium imbedded CaF{sub 2} and Green liquid Flowlite, and progress in understanding the coupling of LIPA chemicals snd dynamic range and timing. (VC)
Date: February 23, 1992
Creator: Falco, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On the Accuracy of the MINC approximation

Description: The method of ''multiple interacting continua'' is based on the assumption that changes in thermodynamic conditions of rock matrix blocks are primarily controlled by the distance from the nearest fracture. The accuracy of this assumption was evaluated for regularly shaped (cubic and rectangular) rock blocks with uniform initial conditions, which are subjected to a step change in boundary conditions on the surface. Our results show that pressures (or temperatures) predicted from the MINC approxi… more
Date: February 1, 1986
Creator: Lai, C.H.; Pruess, K. & Bodvarsson, G.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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3-D slug flow heat transfer analysis of coupled coolant cells in finite LMFBR bundles

Description: A three-dimensional single region slug flow heat transfer analysis for finite LMFBR rod bundles using a classical analytical solution method has been performed. According to the isolated single cell analysis, the results show that the peripheral clad temperature variation as well as the thermal entrance length are strongly dependent upon the degree of irregularity displayed by various coolant geometries. Since under the present LMFBR conditions, fully-developed temperature fields may hardly be … more
Date: February 1, 1978
Creator: Wong, C.N. & Wolf, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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CORTRAN code user manual. [LMFBR]

Description: CORTRAN has been developed as a relatively fast running design code for core-wide steady-state and transient analysis of Liquid Metal Fast Breeder Reactor (LMFBR) cores. The preliminary version of this computer program uses subchannel analysis techniques to compute the velocity and temperature fields on a multiassembly basis for three types of transient forcing functions: total power, total flow, and inlet coolant temperature. Interassembly heat transfer, intra-assembly heat transfer, and intra… more
Date: February 1, 1981
Creator: Cheatham, R.L.; Crawford, S.L. & Khan, E.U.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Computing at the leading edge: Research in the energy sciences

Description: The purpose of this publication is to highlight selected scientific challenges that have been undertaken by the DOE Energy Research community. The high quality of the research reflected in these contributions underscores the growing importance both to the Grand Challenge scientific efforts sponsored by DOE and of the related supporting technologies that the National Energy Research Supercomputer Center (NERSC) and other facilities are able to provide. The continued improvement of the computing … more
Date: February 1, 1994
Creator: Mirin, A. A. & Van Dyke, P. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[Study of flow properties of wet solids using laser induced photochemical anemometry]. Quarterly technical progress report, April--June 1991

Description: Research continues on the flow properties of wet solids. During this period we have made: progress in the analysis of the accuracy of the technique, progress in firming the foundations of LIPA for Solid-Liquid Mixtures, progress in the construction of better prototype skimmers, continued progress in chemically manufacturing both more red europium imbedded CaF{sub 2} and Green liquid Flowlite, and progress in understanding the coupling of LIPA chemicals snd dynamic range and timing. (VC)
Date: February 23, 1992
Creator: Falco, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A MOLTEN SALT NATURAL CONVECTION REACTOR SYSTEM

Description: Fuel-salt volumes external to the core of a molten-salt reactor are calculated for a system in which the fuel salt circulates through the core and primary exchanger by free convection. In the calculation of these volumes, the exchanger heights above the core top range from 5 to 20 ft. Coolants considered for the primary exchanger are a second molten salt and helium. External fuel holdup is found to be the same with either coolant. Two sets of terminal temperatures are selected for the helium. T… more
Date: February 1, 1958
Creator: Romie, F.E. & Kinyon, B.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Model Study of the Pressure Drop Relationships in a Typical Fuel Rod Assembly

Description: A study was made of hydraulic characteristics of Yankee-type fuel rod assemblies using experimental and analytical methods. Two scale model fuel assemblies utilizing both ferrule and strap type arrangements were constructed and tested at atmospheric pressure and room temperature. Analytical methods using semiempirical relationships are substantiated by experimental results for both the fuel assembly having strap-type spacers and the fuel assembly having cylindrical ferruletype spacers. The expe… more
Date: February 1, 1959
Creator: Berringer, R. T. & Bishop, A. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Estimating Liquid Fluxes in Thermally Perturbed Fractured Rock Using Measured Temperature Profiles

Description: A new temperature-profile method was recently developed for analyzing perturbed flow conditions in superheated porous media. The method uses high-resolution temperature data to estimate the magnitude of the heat-driven liquid and gas fluxes that form as a result of boiling, condensation, and recirculation of pore water. In this paper, we evaluate the applicability of this new method to the more complex flow behavior in fractured formations with porous rock matrix. In such formations, with their… more
Date: February 14, 2005
Creator: Birkholzer, J.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measurement of Gas and Liquid Velocities in an Air-Water Two-Phase Flow using Cross-Correlation of Signals from a Double Senor Hot-Film Probe

Description: Local gas and liquid velocities are measured by cross-correlating signals from a double sensor hot-film anemometer probe in pure water flow and air water two-phase flow. The gas phase velocity measured in two-phase flow agrees with velocity data obtained using high-speed video to within +/-5%. A turbulent structure, present in the liquid phase, allows a correlation to be taken, which is consistent with the expected velocity profiles in pure liquid flow. This turbulent structure is also present … more
Date: February 19, 2002
Creator: Gurau, B.; Vassalo, P. & Keller, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

UZ Flow Models and Submodels

Description: The purpose of this Model Report is to document the unsaturated zone (UZ) fluid flow and tracer transport models and submodels as well as the flow fields generated utilizing the UZ Flow and Transport Model of Yucca Mountain (UZ Model), Nevada. This work was planned in ''Technical Work Plan (TWP) for: Performance Assessment Unsaturated Zone'' (BSC 2002 [160819], Section 1.10, Work Package AUZM06). The UZ Model has revised, updated, and enhanced the previous UZ Flow Model REV 00 ICN 01 (BSC 2001 … more
Date: February 11, 2004
Creator: Dixon, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Process simulator for time-dependent material and energy flow in a continuous casting system

Description: A process simulator is developed for the material and energy flow in a continuous casting system which utilizes an electron-beam energy source. A time-dependent, one-dimensional model is used which accounts for energy transport within the ingot and transport to the surroundings by conduction, thermal radiation, and the formation of secondary electrons. Also included are the mass and energy additions associated with the poured metal. A modified finite element method is used to solve the energy e… more
Date: February 6, 1995
Creator: Westerberg, K.W. & McClelland, M.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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BOILING WATER REACTOR TECHNOLOGY STATUS OF THE ART REPORT. VOLUME I. HEAT TRANSFER AND HYDRAULICS

Description: >Information on heat transfer and hydraulics pertinent to the design and operation of boiling water reactor power plants is presented. The following areas of discussion are covered: heat transfer, two-phase density studies, twophase pressure drop, critical heat flux and burnout, boiling stability, calculation procedures for boiling systems, and thermal-hydraulic design procedures for boiling water reactors. (M.C.G.)
Date: February 1, 1962
Creator: Lottes, P.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurement of high acidity using a renewable-reagent fiber optic sensor

Description: The renewable-reagent sensor concept was initially developed to address shortcomings in fiber optic chemical sensors dependent on immobilized, reversible reagents to produce analyte specific responses. The renewable-reagent sensor incorporates semi-selective membranes, analyte specific reagents and remote spectroscopic detection to extract selective responses. While renewable-reagent fiber optic sensor have been demonstrated for a number of chemical sensing applications, the transfer of laborat… more
Date: February 1, 1995
Creator: Kuhn, K. J. & Dyke, J. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydrodynamic stability of lithium flows on porous spherical surfaces

Description: Lithium flows on the inside surface of a porous spherical shell are analyzed to determine their stability characteristics against small perturbations in (1) the film thickness, (2) the colatitude component of the lithium velocity, and (3) the rate of mass supply of lithium through the porous wall. A linearized stability analysis is developed, and it is concluded that lithium film flows are stable against these types of perturbations.
Date: February 1, 1977
Creator: Axford, R. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

100-Mw Nuclear Power Plant Utilizing a Sodium Cooled, Graphite Moderated Reactor

Description: The conceptual design of a 100 Mw(e) nuclear power plant is described. The plant utilized a sodium-cooled graphite-moderated reactor with stainless- steel clad. slightiy enriched UO/sub 2/ fuel. The reactor is provided with three main coolant circuits, and the steam cycle has three stages of regenerative heating. The plant control system allows automatic operation over the range of 20 to 100% load, or manual operation at all loads. The site, reactor, sodium systems, reactor auxiliaries, fuel ha… more
Date: February 28, 1958
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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