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An Elementary Treatment of Gamma-Ray Heating and Gamma-Ray Dosage in Inhomogeneous Reactors

Description: An analysis is made of the heat produced by the absorption of gamma rays in a sample placed into a reactor. It is clearly shown that enormous local (space) variations in gamma flux exist in current reactors. An application to the Hanford reactors is treated in some detail. Although the estimates obtained may be good to but a factor of two, it is clearly shown that in most cases the major portion of the heating is due to (n, {gamma}) reactions within the sample itself, and in some cases to the g… more
Date: October 27, 1952
Creator: Primak, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preparation of Refractories from Uranium Dioxide for Melting Uranium

Description: Attention is now being drawn to the refractory properties of the pure dioxide of uranium, which make it suitable for special applications, such as the melting of pure uranium. Properties of uranium dioxide are described as they relate to fabrication. Forming of UO{sub 2} refractories by pressing and slip casting is discussed, as well as the firing of urania refractories and the properties of fired ware. Health hazards pertaining to UO{sub 2} are briefly described.
Date: April 29, 1952
Creator: R.E. Corwin, G.B. Eyerly
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ADVANCED DESIGNS OF MAGNETIC JACK-TYPE CONTROL ROD DRIVE

Description: The magnetic jack is a device for positioning the control rods In a nuclear reactor, especially in a reactor containing water under pressure. Magnetic actuation precludes the need for shaft seals and eliminates the problems associated with mechanisms operating in water. It consists of a pressure shell, four sets of external stationary magnet coils (hold, grip, lift, pull down), and one Internal moving part (ammature) that impants linear motion to a cluster of rods. (W.L.H.)
Date: November 1, 1959
Creator: Young, J.N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ON THE THEORY OF THE POLARIZATION OF NUCLEONS BY DEUTERONS

Description: In anticipation of the availability of the phase-shifts and mixing parameters, which are being calculated by Bransden, Smith, and Tate for the elastic scattering of nucleons by deuterons (with tensor forces), the von Neuman density matrix and Racah algebra were used to derive expressions for the average value of the spin operator in the emerging beam of nucleons after single and double scattering from unpolarized deuterons. The values of the geometrical factors which appear in these expressions… more
Date: April 1, 1959
Creator: Smith, K. & Peshkin, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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PRELIMINARY HAZARD SUMMARY REPORT ON THE BOILING EXPERIMENTAL REACTOR (BER)

Description: A preliminary evaluation of the hazards associated with a 20-Mw boiling reactor for the purpose of determining site requirements is presented. The Boiling Experimental Reactor design, safety features, and performance are given and the surroundings of the site at Argonne National Laboratory are described. (T.R.H.)
Date: May 1, 1954
Creator: West, J. M.; Anderson, C. A.; Dietrich, J. R.; Harrer, J. M.; Jameson, A. S. & Untermyer, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Power Transfer Functions of the EBWR Obtained Using a Sinusoidal Reactivity Driving Function

Description: A series of reactor frequency response measurements, relating flux or power level to a reactivity input function, were made to evaluate reactor stability for different values of power parameters. These parameters included: power level, steam pressure, and control rod position. The results were extrapolated to predict EBWR stability at higher operating powers. The experimental data may also be used to evaluate the thermodynamic and hydraulic constants. (authl
Date: January 1, 1958
Creator: DeShong, J.A. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Self-Diffusion in Gamma Uranium

Description: The self-diffusion coefficient or uranium was measured at four temperatures in the gamma phase. The data are fitted by an Arrhenius-tyoe equation D = 2.33 x well with previously reported results. The value of D/sub o/ is lower than that predicted by Zener's theory, and the activation energy is much less than the value expected from various empirical codelations. (auth)
Date: July 1, 1959
Creator: Rothman, S. J.; Lloyd, L. T.; Weil, R. & Harkness, A. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Variable Metric Method for Minimization

Description: A method is presented for numerically determining local minima of differentiable functions of several variables. In the proeess of locating each minimum, a matrix is determined which characterizes the behavior of the function about the minimum. For a region in which thc function depends quadratically on the variables, no more than N iterations are required, where N is the number of variables. By suitable choice of starting values and without modification of the procedure, linear constraints can… more
Date: May 1, 1959
Creator: Davidon, W. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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