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Coolant mixing in LMFBR rod bundles and outlet plenum mixing transients. Progress report, December 1, 1979-February 29, 1980

Description: Information is presented concerning bundle geometry with wrapped and bare rods; LMFBR outlet plenum flow mixing; and theoretical determination of local temperature fields in LMFBR fuel rod bundles.
Date: January 1, 1980
Creator: Todreas, N.E.; Golay, M.W. & Wolf, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Neutrino mixing and oscillation in a grand unified field theory SO(10)

Description: The investigation shows that it is very difficult to achieve neutrino mixing of other than the V/sub ..mu../-..nu../sub tau/ type in any minimal SO(10) model in which neutrino masses are generated by the Gell-Mann-Ramond-Slansky mechanism, because of the severe constraints placed on the mass matrix by quark phenomenology.
Date: January 1, 1980
Creator: Tanaka, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Turbulent interchange in triangular array bare rod bundles

Description: Bulk mixing coefficients were measured for single plane water flow in a simulated rod bundle with a pitch to diameter ratio of 1.10. A tracer technique employing Rhodamine B as the tracer and measuring fluorescence was used. Isokinetic sampling was achieved by using a pressure balance method. The results were corrected for both entrance effects and diversion crossflows. The results showed a change in Reynolds number behavior as the laminar sublayer began to ''choke'' the turbulent mixing. This,… more
Date: July 1, 1977
Creator: Kelly, J.M. & Todreas, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Outlet plenum mixing for transient overpower conditions of a one-exit nozzle LMFBR

Description: Two types of transient tests were employed to model a one-exit nozzle LMFBR outlet plenum. Water was used as a test fluid in the simulation of constant flowrates, Transient Overpower (TOP) conditions. In the first test, simulated fuel flow was 85% and blanket flow was 15%, whereas in the second test, the fuel flow was 100%. This allowed the assessment of the mitigating effects of blanket flow upon the exit nozzle temperature transient. The flow field was clearly three-dimensional, and a less ac… more
Date: April 1, 1978
Creator: Howard, P. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Self-mixing phenomenology in hypothetical core-disruptive accidents

Description: Physical processes are investigated that lead to the thermal equilibration of a disrupted liquid metal fast breeder reactor (LMFBR) core following a hypothetical core-disruptive accident (HCDA). Their impact is assessed, particularly as relating to the SIMMER code. The turbulent structure in the core region is characterized and bounding estimates are derived of thermal equilibration (''self-mixing'') times. The implication of these results for LMFBR safety research is discussed briefly.
Date: December 1, 1980
Creator: Chapyak, E.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ion-induced surface modification of alloys

Description: In addition to the accumulation of the implanted species, a considerable number of processes can affect the composition of an alloy in the surface region during ion bombardment. Collisions of energetic ions with atoms of the alloy induce local rearrangement of atoms by displacements, replacement sequences and by spontaneous migration and recombination of defects within cascades. Point defects form clusters, voids, dislocation loops and networks. Preferential sputtering of elements changes the c… more
Date: November 1, 1983
Creator: Wiedersich, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Coolant mixing in LMFBR rod bundles and outlet plenum mixing transients. Progress report, September 1, 1979-November 30, 1979

Description: Information is presented concerning bundle geometry with wrapped and bare rods; subchannel geometry with bare rods; LMFBR outlet plenum flow mixing; and theoretical determination of local temperature fields in LMFBR fuel rod bundles.
Date: January 1, 1979
Creator: Todreas, N.E.; Golay, M.W. & Wolf, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Coal Technology Program progress report for August 1977

Description: The projects reported this month include those for coal conversion process development, materials engineering, alkali metal vapor topping cycles, a coal equipment test facility, a fluidized bed combustor technology test unit, engineering and support studies, process and program assistance, and environmental assessment studies. In hydrocarbonization research, material balance results from Run HC-21 confirm earlier tests with Wyodak coal, showing an oil yield of 21% based on MAF coal. In the coal… more
Date: October 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurement of airborne radioactivity and its meteorolgical application. Part VI. Annual report, 1 August 1974--31 July 1975

Description: Continuous data of the radionuclides 7Be, 32P, 33P, 35S and of fallout, as well as tentative data of the ozone concentration are given for the reporting period. A new Ge(Li) Gamma Spectrometer, permitting the routine monitoring of the fallout composition is described. A method is set forth for the forecast of influxes of stratospheric air to a certain place on the earth surface. The forecasting quality is subjected to continuous checking. A first analysis of the ozone concentration in correlati… more
Date: March 1, 1977
Creator: Reiter, R.; Kanter, H.J.; Sladkovic, R. & Poetzl, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Conceptual flow sheets development for coal conversion plant coal handling-preparation and ash/slag removal operations

Description: This report presents 14 conceptual flow sheets and major equipment lists for coal handling and preparation operations that could be required for future, commercial coal conversion plants. These flow sheets are based on converting 50,000 tons per day of clean coal representative of the Pittsburgh and Kentucky No. 9 coal seams. Flow sheets were used by Union Carbide Corporation, Oak Ridge National Laboratory, in a survey of coal handling/preparation equipment requirements for future coal conversi… more
Date: July 1, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermal impact assessment of multi power plant operations on estuaries. [Computer calculations for Hudson River]

Description: The assessment of the thermal impact of multi power plant operations on large estuaries requires careful consideration of the problems associated with: re-entrainment, re-circulation, thermal interaction, delay in the attainment of thermal equilibrium state, and uncertainty in specifying open boundaries and open boundary conditions of the regions, which are critically important in the analysis of the thermal conditions in receiving water bodies with tidal dominated, periodically reversing flow … more
Date: January 1, 1977
Creator: Eraslan, A. H.; Kim, K. H. & Harris, J. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Prediction of the entropy production and pressure losses in two-phase flow from the mixing length theory

Description: The case of vertical two-phase flow is examined under the light of the mixing-length theory which was succesfully applied to turbulent flows. The purpose of the analysis is to obtain the pressure distribution along the geothermal wells. The well is modeled as a vertical pipe carrying a fluid of variable density; the density distribution is described by two parameters. The conservation equations are written in boundary layer coordinates and the pressure losses are computed through the entropy pr… more
Date: April 1, 1980
Creator: Maeder, P. F. & Michaelides, E. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Low enthalpy convective system in Western Ohio

Description: A distinct positive anomaly in the temperatures of the shallow (Pleistocene) aquifers along the Cincinnati-Findlay Arch in Western Ohio coincides with a low geothermal gradient. A conceptual model of convective currents associated with a tensional fault and/or fracture system along the crest of the Arch is suggested as an explanation of the anomaly. Hydrochemical information indicates that various quantities of warmer ground water, with the composition characteristics of deep bedrock aquifers, … more
Date: January 1, 1980
Creator: Cannon, Melinda S.; Tabet, Charles A. & Eckstein, Yoram
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Quantitative study of mixing in annular and raschig ring filled tanks

Description: A quantitative study of mixing, which utilized the exit age distribution theory, has been completed for bench-scale annular and raschig ring filled tanks, in addition to a pilot-scale annular tank. A study of mixing and fluid flow in a full-scale, single-entry, raschig ring filled tank also was initiated. Results showed the bench-scale raschig ring filled tank approached plug-flow (no mixing) behavior. In a bench-scale annular tank, regardless of whether fluid entered tangentially or nontangent… more
Date: July 14, 1980
Creator: Fredrickson, M. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Coal technology program. Progress report, September 1977

Description: A successful hydrocarbonization experiment at 300 psi of hydrogen and approximately 1050/sup 0/F was completed with Illinois No. 6 coal that had been chemically pretreated with aqueous CaO and NaOH. In pressurized carbonization, one successful experiment at approximately 1100/sup 0/F and 415 psi of methane was completed with vacuum distillation residue from the H-Coal process. In the thick section pressure vessel work, procedures are being developed with the DATA TRAK heat treating facility to … more
Date: October 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydrogen mixing in a closed containment compartment based on a 1-D model with convective effects. Final report

Description: A transient one-dimensional finite-difference model was developed to determine the hydrogen concentration variation with position in a closed containment compartment due to radiolysis following a LOCA. The model includes mixing due to molecular and eddy diffusion and natural convection. For representative compartments, the maximum hydrogen concentration difference between the bottom and top of the compartment never exceeds 0.25 volume percent when all three mixing mechanisms are considered for … more
Date: January 1, 1980
Creator: Willcutt, G. J. E., Jr.; Gido, R. G. & Koestel, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Influence of ion beam mixing on the growth of high temperature oxide superconducting thin film

Description: The superconducting properties of high temperature superconductor thin films are dependent on the quality of the substrate used to grow these films. In order to maximize the lattice matching between the superconducting film and the substrate, we have used a YBa{sub 2}Cu{sub 3}O{sub 7} thin film deposited on {l angle}100{r angle} SrTiO{sub 3} as a template. The first film was prepared by coevaporation of Y, BaF{sub 2} and Cu on {l angle}100{r angle} SrTiO{sub 3}, followed by an anneal in wet'' o… more
Date: January 1, 1989
Creator: Bordes, N.; Rollett, A.D.; Cohen, M.R. & Nastasi, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Sulfuric acid spills in marine accidents

Description: Concentrated sulfuric acid and oleum are among the most potentially hazardous chemicals routinely transported in bulk quantities on US and international waterways. Conceivably, during a marine mishap, tons of sulfuric acid could be abruptly released into the water, and the consequences of such a spill could be detrimental to man and the environment. Several acid spill scenarios are briefly described, and the results from laboratory experiments designed to simulate two different types of acid sp… more
Date: July 1, 1980
Creator: Tang, I N; Wong, W T; Munkelwitz, H R & Flessner, M F
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Liquid Phase Methanol LaPorte Process Development Unit: Modification, Operation, and Support Studies

Description: The LPMEOH process was conceived and patented by Chem Systems Inc. in 1975. Initial research and studies on the process focused on two distinct modes of operation. The first was a liquid fluidized mode with relatively large catalyst pellets suspended in a fluidizing liquid, and the second was an entrained (slurry) mode with fine catalyst particles slurried in an inert liquid. The development of both operating modes progressed in parallel from bench scale reactors, through an intermediate scale … more
Date: February 28, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Coal technology program. Progress report, May 1977

Description: Two successful operability tests with sustained operation of the bench-scale hydrocarbonizer were achieved with Illinois No. 6 coal diluted with char. Several activities in the area of nondestructive testing of coatings are reviewed. Failure analysis activities included examination of several components from the solvent refined coal plants at Wilsonville, Alabama, and Tacoma, Washington. In the gas-fired potassium boiler project, all of the design work were completed except for several of the i… more
Date: July 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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