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Application of ideal reactors to studies in atmospheric chemistry

Description: Mass-transfer effects and surface reactions may severely obscure the observation of homogeneous chemical reaction rates from experimental reactor data. Such problems are particularly pertinent to studies in the atmospheric sciences, owing to the tendency for increased surface-reaction interference at the low concentrations usually of interest. Criteria are presented for ideal behavior in three basic types of experimental reactors. Under conditions satisfying these criteria the effects of competing surface reactions can be accounted for quantitatively, allowing the true homogeneous effect to be observed. Data from tubular reactors can be analyzed accurately even under some nonideal conditions. The available solutions to tubular reactor models useful for this purpose were compiled and tabulated. (auth)
Date: August 1, 1973
Creator: Hales, J.M.; Wilkes, J.O. & York, J.L.
Partner: UNT Libraries Government Documents Department

METHOD AND APPARATUS FOR QUANTITATIVE NEUTRON ACTIVATION ANALYSIS OF LARGE SAMPLES

Description: A method and apparatus were devised to irradiate multiple samples of large physical size simultaneously in a nonuniform neutron flux. A capsule containing the samples and flux monitors is rotated about an axis at constant speed with samples fixed in a symmetrical geometry so that each position receives the same integrated neutron flux. (auth)
Date: January 1, 1964
Creator: Hutchin, W H
Partner: UNT Libraries Government Documents Department

TRANSURANIUM QUARTERLY PROGRESS REPORT FOR PERIOD ENDING FEBRUARY 28, 1963

Description: The development of separation processes for the transuranium elements, process equipment development, HFIR target fabrication development, design of the TRU Facility, design of development facilities, corrosion studies, and analytical research and development studies are reported. (auth)
Date: October 1, 1963
Creator: Burch, W.D. comp.
Partner: UNT Libraries Government Documents Department

LIQUID THERMAL DIFFUSION

Description: A revised and expanded version of NNES-DC-1. The liquid thermal diffusion method for the separation of isotopes is described. The discussion includes the experimental aspects of the method, description of equipment, and the theoretical aspects of the process as applied to the design, development, and performance criteria. A short history of the liquid thermal diffusion method from 1940 to 1945 is preserted along; with a survey of relevant literature prior to 1940. The remainder of the report is concerned with theoretical aspects. (J.R.D.)
Date: September 10, 1946
Creator: Abelson, P.H.; Rosen, N. & Hoover, J.I. eds.
Partner: UNT Libraries Government Documents Department

FINAL SPECIFICATIONS FOR GOVERNMENT-PURCHASED EQUIPMENT FOR ARGONNE LOW POWER REACTOR (ALPR)

Description: The final specifications for equipment for the ALPR were prepared from original bid specifications, proposals submitted on equipment purchased, and purchase orders. Each specification includes data pertaining to the equipment purchased, revisions made during the shop fabrication, reference drawing lists vendor's name, and purchase order numbers. (A.C.)
Date: May 1, 1959
Creator: Hamer, E.E. & Hooker, H.H.
Partner: UNT Libraries Government Documents Department

MANIPULATOR CABLE WITH CONSTANT STRESS (thesis)

Description: A manipulator or mechanical arm involves an upper and a lower arm, with a variable angle between them. Cables used to transmit motion and force from the upper to the lower arms pass over a pulley at the joint or elbow. A pulley, axiaily fixed with respect to the joint, imposes a change in length of the cable as the angle between the arms varies. Manipulation design requires a cable of constant length during this variation; this constant length may be achieved by guiding the center of the pulley along the proper path. Acceptable solutions were obtained in terms of variables such as the lengths of each arm, the radius of the pulley, and the angle between the arms. In one design the pulley center is moved along a straight line with respect to the lower arm, while in the other solution the pulley center is moved along a circular arc with respect to the upper amn. Practical and economical mechanisms based on these solutions were investigated for use in manipulator design. (auth)
Date: November 1, 1959
Creator: Grimson, J.H.
Partner: UNT Libraries Government Documents Department

METALLOGRAPHY OF IRRADIATED UO$sub 2$-CONTAINING FUEL ELEMENTS

Description: A description of hot laboratory metallography and techniques of operation are presented. These facilities and techniques provided a means of examining fuel elements that contain UO/sub 2/ after irradiation to high burnups. Some unusual irradiation characteristics of UO/sub 2/ were observed, and each effect is discussed. A complete explanation of the causes of such effects has not yet been obtained. (auth)
Date: January 15, 1958
Creator: Barney, W.K. & Wemple, B.D.
Partner: UNT Libraries Government Documents Department

GAUGE FOR MEASURING BOW OF TUBES

Description: A mechanical gage was designed to measure the bow over any one-foot length of long cylindrical material. The gage was used successfully for measuring bow in components of tubular fuel elements at the Savannah River Laboratory. (auth)
Date: October 31, 1962
Creator: Alewine, G.B.
Partner: UNT Libraries Government Documents Department