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ANALOG SOLUTION OF A MODEL OF THE SOURCES OF ELUTRIATABLE FINES IN THE FLUIDIZED BED CLACINATION PROCESS

Description: A model is proposed which depicts the sources of elutriatable fines in the fluidized bed calcination process as being in two major groups, spray drying mechanisms and attrition mechanisms. Based on this model, equations are derived which express the rate of change of the concentration of a chemical tracer material in the elutriated fines, following introduction of the tracer into the feed and following its removal from the feed. This system has been simulated on an analog computer, and by matching the computer simulation to results from an actual calciner run, the rates of generation of fines by each of the two groups of mechanisms has been determined; the same technique results in an estimate of the amount of these fines remaining in the fluidized bed. Agreement between postulated results and results of actual experimental tests lends credence to the usefulness of this analytical technique. (auth)
Date: February 28, 1964
Creator: Grimmett, E.S.
Partner: UNT Libraries Government Documents Department

Technical note on the determination of K-reactor last-ditch cooling adequacy

Description: The Hanford reactors contain a very large inventory of fission products and it is very important that this inventory be contained. In recognition of this, rather stringent reactor cooling requirements have been established for the Hanford reactors. This includes the requirement of three independent cooling systems, including the system for full level operation. The second and last-ditch systems both are usable only after a reactor scram and take-over automatically from the flywheel decay of the process pumps. In 1962, two projects were completed that affected the last-ditch cooling adequacy of the K reactors, One project increased the reactor pumping capacity and, therefore, its power level; and the other considerably modified the emergency cooling systems. Since this time, three tests have been conducted to determine this last-ditch cooing adequacy. In order to provide a uniform approach to this adequacy determination, the method employed by Reactor Engineering is presented herein. The report presents a method for determining the maximum reactor power level for which measured last-ditch flows will provide adequate emergency cooling, A number of pertinent charts are included, A method is also presented for determining the last-ditch flow that should be measured during a test for any desired level of normal reactor operation.
Date: February 28, 1964
Creator: Jones, S. S.
Partner: UNT Libraries Government Documents Department

[News Script: Birthday gals]

Description: Script from the WBAP-TV/NBC station in Fort Worth, Texas, covering a news story about a pair of leap day twins celebrating their first Saturday birthday in 28 years.
Date: February 28, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Script: Jack Ruby]

Description: Script from the WBAP-TV/NBC station in Fort Worth, Texas, covering a news story about the continuing process of selecting a jury for Jack Ruby's trial in Dallas.
Date: February 28, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Script: Loudspeaker bandit]

Description: Script from the WBAP-TV/NBC station in Fort Worth, Texas, covering a news story about a a young boy who is being charged with armed robbery.
Date: February 28, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Script: Radio Free Europe]

Description: Script from the WBAP-TV/NBC station in Fort Worth, Texas, covering a news story about Jan Nowak, chief of the Polish Desk at Radio Free Europe, who is in Fort Worth on an annual fund raising drive for the organization.
Date: February 28, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Script: Wife killer]

Description: Script from the WBAP-TV/NBC station in Fort Worth, Texas, covering a news story about a 43-year-old man who admits that he killed his wife.
Date: February 28, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

HIGH-TEMPERATURE MATERIALS AND REACTOR COMPONENT DEVELOPMENT PROGRAMS. VOLUME III. INSTRUMENTATION AND CONTROLS. Third Annual Report

Description: The development of instruments for controlling reactor operation is reported. A shim-scram actuator was designed incorporating an electromagnetic dnlve for shim and scram, a shim speed limiting device, and a force feedback position indicator. A three-channel trip circuit and a two-out-of-three logic circuit using controlled switches in place of transistors was designed, built, and tested. A capacitance-type temperature sensor was operated in an inert atmosphere at temperatures up to 3782 deg F. Models of a gridded and a compensated a-c ionization chamber were tested in both thermal neutron and gamma environments. The compensated a-c ionization chamber demonstrated better than 98% gamma compensation at a thermalneutron flux of 5 x 10/sup -11/ nv and 1 Mw reactor power. Unpowered charged-fragment neutron detectors using boron-10 or uranium-235 as the emitter coating were demonstrated to respond linearly to changes of thermalneutron flux. Potentials, developed within the detecting circuit, possibly due to contact potentials, are suspected to be the cause of detector output-current instability as a function of time. Fission counter operation at 816 deg C was demonstrated to be feasible, but operation was not entirely satisfactory. Adequate reactor power range neutron sensing to 535 deg C is feasible using uncompensated d-c ionization chambers. (N.W.R.)
Date: February 28, 1964
Partner: UNT Libraries Government Documents Department

STUDIES OF THERMIONIC MATERIALS FOR SPACE POWER APPLICATIONS. Quarterly Progress Report, September 1, 1963-November 30, 1963

Description: Isostatic-pressing techniques using reversible gels as the pressing medium were studied for improving the uniformity in density and structure of UC-- ZrC bodies. Control of powder-size fraction was studied as a means for controlling the pore distribution. Control of the carbon content by thermal treatment in a mixture of H/sub 2/ and hydrocarbon was also studied. Near stoichiometric 30 UC--70 ZrC powder was prepared by gas-metal reaction. Assembly of an apparatus for study of the thermochemical vapor-deposition of tungsten is near completion. The vaporization and fission product release rates of a hot- pressed high-density 30 UC -70 ZrC sample were measured from 1800 to 2000 deg C. A low-pressure gas adsorption apparatus was set up for measuring the true surface area of UC-ZrC samples. The cell used for the study of fission product diffusion through tungsten was fabricated. Samples are being prepared for fuel-clad compatibility and refractory-metal interdiffusion studies. Diffusion-emission studies were made on a rhenium-clad UC sample at 1800 deg C. The molybdenum pedestal of the loading device of a high-temperature mechanical testing furnace was modified. Thermionic emission microscopy showed that areas of high work function can co-exist with betteremitting UO/sub 2/ dispersions on the surface of a W-UO/sub 2/ cermet at 1650 deg C. Life-testing cells for fueled cesium converters using planar, as well as cylindrical fueled emitters were designed. The cylindrical configuration was favored, since a reliable cylindrical cell envelope was developed. (auth)
Date: February 28, 1964
Partner: UNT Libraries Government Documents Department