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A Status Report on Reactivity Coefficients in Fast Reactors and Methods of Investigating Their Effects on Reactor Stability

Description: BS>Methods for predicting the stability of fast reactors in the presence of both positive and negative reactivity coefficients are surveyed. Experimental methods of determining reactor stability are reviewed: excursion, transient, and oscillator. Sources of reactivity coefficients are discussed for both zero power and nonzero power operation. Representative reactivity coefficient values are presented, and positive coefficients due to Doppler effect, fuel bowing, and sodium coolant expansion are… more
Date: March 1, 1961
Creator: Agresta, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electrical Resistivity of Lanthanum, Praseodymium, Neodymium, and Samarium

Description: The electrical resistivities of polycrystalline samples of La, Pr, Nd, and Sm are reported in the temperature range 1.3 to 300 deg K. La exhibits a superconducting transition at 5.8 deg K. The curve for Pr has slope changes at 61 and 95 deg K. The Nd curve shows small jumps at 5 and 20 deg K. Sm shows slope changes at 14 and 106 deg K. (auth)
Date: March 15, 1961
Creator: Alstad, J. K.; Colvin, R. V.; Legvold, S. & Spedding, F. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Southwest Retort, Volume 13, Number 7, March 1961

Description: This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community. Published monthly during long academic semesters.
Date: March 1961
Creator: American Chemical Society. Dallas/Fort Worth Section.
Item Type: Refine your search to only Journal/Magazine/Newsletter
Partner: UNT Libraries
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Research project, Contract CA-264, chemical milling of counterbore recesses in the uranium wall of Zircaloy-2 clad uranium tubes. Final report

Description: This document provides the final report on the research project of chemical milling of counterbore recesses in the uranium wall of Zircaloy-2 clad uranium tubes. The scope of work, results and conclusions, and experimental procedures are provided.
Date: March 28, 1961
Creator: Atkins, D. C. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Conceptual Design of a Coupled Breeding Superheating Reactor, CBSR

Description: The conceptual design of the Coupled Breeding Superheating Reactor, CBSR, for achieving a positive breeding gain and for producing 65 Mw of electric power is presented. The design combines a steam-cooled fast region and a nonboiling pressurized light-water-cooled thermal region. The advantage offered by this arrangement as compared with that using a solid moderator in the thermal zone is that, if a power excursion occurs, the water will increase the void content and tend to limit the excursion.… more
Date: March 1, 1961
Creator: Avery, R.; Dewey, W. V.; Rohde, R. & Toppel, B. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analog to digital converter system for temperature monitoring -- B, C, D, DR, F, and H reactors

Description: This document discusses a proposal that certain presently installed reactor process water outlet temperature data logging equipment in subject reactors to be replaced with new functionally simplified equipment of a more adequate design. The primary purpose of the proposed installation is to replace existing equipment which is obsolete and in three reactors is worn out to the point where the equipment is out of service frequently for periods of time up to 8 hours or more. The new equipment will … more
Date: March 23, 1961
Creator: Ballowe, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Adsorption of Uranium on Hydrous Zirconium Oxide from Uranyl Sulfate Solutions at Elevated Temperatures

Description: Measurements of the adsorptive capacity of hydrous zirconium oxide for uranium from uranyl sulfate solutions at high temperature (250 degrees C) were made to characterize the effects of certain system variables on the uranium adsorption process.
Date: March 1, 1961
Creator: Banter, J. C. & Wheeler, S. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aeroradioactivity Survey and Areal Geology of the Oak Ridge National Laboratory Area, Tennessee and Kentucky (ARMS-I)

Description: Report regarding an airborne radioactivity survey that took place over a 10,000 square mile area around the Oak Ridge National Laboratory near Knoxville, Tennesse. Topics include the types of bedrock noted in the area as well as their levels of radioactivity.
Date: March 1961
Creator: Bates, Robert G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Summary of HRT Run 19

Description: This report details damage and impacts to operations and maintenance resulting from failures of the blanket circulating pump and fuel circulating pump at the Oak Ridge National Laboratory during a startup on February 5, 1959. The reactor was critical for 18 hours.
Date: March 16, 1961
Creator: Beall, S.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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HYDRAULIC TESTS OF A PROTOTYPE HALLAM FUEL ELEMENT (SU-9) TO BE TESTED IN SRE

Description: Pressure-drop measurements were made across a mockup of a Hallam prototype fuel element in a test section installed in the Hallam Hydraulic Loop. The flow channel was identical to an SRE fuel channel and included simulated upper and lower plenums. The fuel element mockup was equipped with a Hallam-type variable orifice at the channel exit and a fixed orifice in the strainer basket at the bottom of the element. Tests were performed to determine the optimum size for the fixed orifice and the temp… more
Date: March 13, 1961
Creator: Beeley, R. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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REVIEW OF INVESTIGATIONS PERTINENT TO THE PREDICTION OF THE THERMAL BEHAVIOR OF FAST REACTORS UNDER ABNORMAL OPERATING CONDITIONS

Description: Results are summarized for a survey of methods for predicting fuel element and coolant behavior in sodiumcooled fast reactors under abnormal operating conditions. Circumstances prior to, during, and after meltdown are considered, and the behavior of fuel and coolant during transients is discussed. Reactor excursions, theory of fuel element thermal transients, reactor coolant transients in single and two-phase flows, and specific topics such as two-phase flow patterns, two-phase pressure drop, a… more
Date: March 15, 1961
Creator: Beers, F.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dislocation Substructures in Deformed and Recovered Molybdenum

Description: Specimens suitable for transmission electron microscopy were prepared from bulk polycrystalline molybdenum after tensile deformation and recovery. The resulting dislocation substructures are described. Some tentative conclusions concerning the mechanism of plastic deformation in molybdenum are discussed. (auth)
Date: March 1, 1961
Creator: Benson, R.; Thomas, G. & Washburn, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dislocation Substructures In Deformed And Recovered Molybdenum

Description: Specimens suitable for transmission electron microscopy have been prepared from bulk polycrystalline molybdenum after tensile deformation and recovery. The resulting dislocation substructures are described. Some tentative conclusions concerning the mechanism of plastic deformation in molybdenum are discussed.
Date: March 1961
Creator: Benson, R.; Thomas, G. & Washburn, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chemical Development Section C Progress Report for October-November 1960

Description: Studies are being made on the recovery of thorium (and uranium) from granitic rock, since this source represents a very large potential thorium reserve for the nuclear power industry. In preliminary leaching studies on 16 granite samples (containing 8-95 ppm thorium and 1.5-16 ppm uranium), maximum recoveries of thorium and uranium ranged 30-85% and 15-65% respectively, and sulfuric acid consumption was high (30-120 lbs H2SO4 per ton of granite). A relatively high acidity was needed to obtain r… more
Date: March 3, 1961
Creator: Brown, K. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Feasibility Study of a New Mass Flow System : Quarterly Report No. 3 Covering the Period from December 1, 1960 to February 28, 1961

Description: This is the third quarterly report that documents a system of mass flow that can record measurements of homogeneous flow, slurries, highly corrosive fluids and multiphase fluids, additionally considering pressure drops, measuring external to the flow, ruggedness and reliability.
Date: March 20, 1961
Creator: Burgwald, G. M.; Stone, C. A. & Genthe, William K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FEASIBILITY STUDY OF A NEW MASS FLOW SYSTEM. Quarterly Report No. 3 covering Period December 1, 1960 to February 28, 1961

Description: A mass flow measurement technique was devised which meets many requirements for mass flow measurement systems. In this technique. fluid is made to pass through a pivoted S-shaped tube. which tends to rotate due to the angular momentum of the fluid. A torque motor and torsion spring maintain zero displacement. the restoring force being a measure of the angular momentum, and density is measured by absorption of radiation passing through a window in the S tube. From the measured angular momentum a… more
Date: March 20, 1961
Creator: Burgwald, G.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Evaluation of the Fallout-Radiation Protection Afforded by a Southwestern Residence

Description: Report regarding experiments made to determine the fallout-radiation protection offered by a "single-story stucco and frame house with a heavy shake roof and no basement," (p. 5) which is noted as being popular in the southwestern United States.
Date: March 14, 1961
Creator: Burson, Z.; Parry, D. & Borella, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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THE DYNAMIC PINCH AS A HIGH-INTENSITY LIGHT SOURCE FOR OPTICAL MASER PUMPING

Description: >The optical radiation that occurs in a dynamic plasma pinch experiment depends in part on the amount and type of impurity atoms present in the system. By proper choice of these impurities, it should be possible to tailor the optical radiation from the pinch in intensity, spectrum, and duration such that the kinetic energy of motion (1OO to 1OOO joules) appears as radiation enengy in less than 10/sup -6/ sec. This should provide a good method of optical pumping for pulse optical maser operation… more
Date: March 31, 1961
Creator: Colgate, S. A. & Trivelpiece, A. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ionization in Crossed Electric and Magnetic Fields

Description: Both in magnetohydrodynamic shocks and in accelerated partially ionized gas flow across a magnetic field, space charge separation occurs that establishes very large electric fields in the direction of motion. The width of the current layers associated with the acceleration is never less than the electron Larmor radius with no collisions and is broadened by electron collisions to a width solely determined by the effective resistivity. The electrons gain an energy regardless of collisions equal t… more
Date: March 15, 1961
Creator: Colgate, Stirling A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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