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Single Particle Excitation Theory Of The Photonuclear Giant Resonance

Description: Calculations of the photonuclear giant resonance according to the Wilkinson model are presented in this report. In this model the giant resonance in the cross section for absorption of gamma rays by nuclei is ascribed to the excitation of large numbers of nucleons in closed shells. The model generally predicts correctly the integrated cross section for the giant resonance, bu the resonance energy is too low. Results are presented in a series of tables and formulas so that the integrated cross s… more
Date: July 30, 1963
Creator: Buskirk, F.
Partner: UNT Libraries Government Documents Department
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SM-2 Full Scale Flow Studies Termination Report

Description: Abstract: Hydrodynamic flow studies were conducted on a full scale model of the SM-2 reactor vessel and core. Test fluid was water at 200 psi and 200 degree F. Test facilities, model, and instrumentation design are discussed. Flow distribution in the stationary fuel elements, lattices, and control rods of the second pass was investigated. Pressure losses through the various core components were measured and are compared with calculated values. Observed over-all pressure drop was 71 feet of wate… more
Date: July 30, 1961
Creator: Christenson, J. A.; Richards, W. M. S. & Davidson, S. L.
Partner: UNT Libraries Government Documents Department
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Progress in reactor water plant operation, FY 1958--FY 1962

Description: The water plants and associated steam back-up facilities which supply coolant to Hanford`s eight production reactors are large and vital facilities. Their reliability is essential to the safety and continuity of reactor operation. Their output and efficiency are important to reactor productivity and to the unit cost of plutonium and other irradiation products. In the fiscal year just ended, the cost of operating the reactor water and steam plants was $16,000,000, which represented a major fract… more
Date: July 30, 1962
Creator: Hauff, T. W. & McDougal, P. G.
Partner: UNT Libraries Government Documents Department
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Laboratory studies of the use of uranium(IV) as a plutonium reductant in a Purex process

Description: This report describes laboratory-scale studies made to evaluate the feasibility of using uranium(IV)-hydrazine instead of ferrous sulfamate-sulfamic acid as the partitioning agent in the Hanford Atomic Products Operation Purex separations plant. Iron(II), in combination with sulfamic acid as a holding reductant, has been used very successfully for many years as a plutonium reductant in solvent extraction separation processes for irradiated nuclear fuels. However, the iron remains in the radioac… more
Date: July 30, 1964
Creator: Mendel, J. E.
Partner: UNT Libraries Government Documents Department
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Production test IP-603-I evaluation of accidental fuel flushing potential D-DR reactors

Description: This purpose of this test is to acquire data to support further studies aimed at determining whether a normal column of I&E enriched fuel elements or a normal column of natural fuel elements can be flushed from a process tube with the crossheader valved down to shutdown position if the front riser pressure is raised to normal operation pressure.
Date: July 30, 1963
Creator: Hollifield, P. J. & George, D. K.
Partner: UNT Libraries Government Documents Department
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Applications of Snap Reactor Systems to Communications Satellites

Description: Methods are presented for determining the electric power requirements of a given communications mission in terms of mission and orbit parameters. Analyses were made of possible applications of available and projected space auxiliary power units in these satellites. The satellitc as a communication node is discussed. Example calculations are given. (M.C.G.)
Date: July 30, 1962
Creator: Wimmer, R. E.
Partner: UNT Libraries Government Documents Department
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RADIOCHEMICALLY DETERMINED RATIOS OF ASYMMETRIC TO SYMMETRIC FISSION OF U$sup 233$, Pu$sup 239$, AND U$sup 235$ AS A FUNCTION OF NEUTRON ENERGY

Description: Results of studies concerning the asymmetric/symmetric ratio for fission induced by neutrons of energies corresponding to various fission resonances are presented. These studies were carried out primarily with monoenergetic neutrons at 1.8, 2.3, and 4.3 ev. The fission ratios in the low-energy resonance region was found to change from resonance to resonance, and the ratios appear to fall into symmetry classes each of which has a characteristic peak-to-valley mass yield ratio. It appears that a … more
Date: July 30, 1962
Creator: Burgus, W. H.
Partner: UNT Libraries Government Documents Department
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Spectroscopic Studies of Imploding Plasma Rings in Detonable Gas Mixtures

Description: Spectroscopic observations were made of the flow field behind a cylindrical hypersonic wave front resulting from an imploding electrical dischange into an initially low pressure quiescert gas. Sub-microsecond resolved spectra were obtained by use of a quartz prism monochromatorphotomultiplier detector system with photographic recording of an oscilloscope displayed output signal. Electrically produced plasma rings were established in detonabie as well as non-reactive gases. Strong indications we… more
Date: July 30, 1962
Creator: Foreman, K. M. & Levy, M. E.
Partner: UNT Libraries Government Documents Department
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Pathfinder Atomic Power Plant. End Closure Development for Low Enrichment Superheater Fuel Rods

Description: Research on a welding process for closing the ends of pathfinder fuel elements is reported. Optimum parameters for certain variables (amperage, weld travel, preheat, etc.) affecting weld quality were determined, and two modified end cap designs were investigated and found to reduce weld sensitivity to certain variables. Use of chills on the fuel tube greatly improved weld puddie geometry and microstructure. Optimum weld parameters for rods containing UO/sub 2/ fuel were experimentally establish… more
Date: July 30, 1963
Creator: Boschke, R. A. & Wiggins, R. J.
Partner: UNT Libraries Government Documents Department
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A Perturbation Method for Solving the Angle Dependent Nucleon-Meson Cascade Equations

Description: A method is described for obtaining an approximate solution to the equations describing a nucleon-meson cascade by using the angular dependence of the secondary particle production kernels as a perturbation. The usefulness of the method lies in the fact that in a slab geometry the equations that must be solved numerically are essentially the same as those that are used in the straight-ahead approximation and have been solved previously. (auth)
Date: July 30, 1963
Creator: Alsmiller, R. G., Jr. & Alsmiller, F. S.
Partner: UNT Libraries Government Documents Department
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Pluto quarterly report No. 20, April--June 1964

Description: Declassified 27 Nov 1973. Information is presented concerning Tory-2C operations and testing; reactor kinetics; control system and instrumentation; and physical properties of ceramic materials. (DCC)
Date: July 30, 1964
Partner: UNT Libraries Government Documents Department
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THERMAL CYCLING TESTS ON U-10 w/o Mo FOR THE ORNL FAST BURST REACTOR

Description: One of the uncertainties concerning the use of uranium-10 wt.% molybdenum in the ORNL Fast Burst Reactor is the thermal-cycling behavior of this alloy. Accordingly, an experimental program was undertaken to determine whether transformation or distortion of gamma-phase uranium--10 wt.% molybdenum can occur during simulated fast-burstreactor thermal cycling, and, should transformation occur, to establish the thermal cycling behavior of partially transformed uranium- - 10 wt.% molybdenum. Specimen… more
Date: July 30, 1960
Creator: Minushkin, B.
Partner: UNT Libraries Government Documents Department
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Mound Laboratory Progress Report for July 1963

Description: 8 7 6 2 ; 7 4 7 6 : 7 8 : : ; half life of 3.781 plus or minus 0.010 years based on calorimetric measuiements. The calorimetric assay of the sample will be continued ior several years to decrease the probable error. The decay scheme for /sup 209/Po--/sup 209/Po/ isitopic mixtures is being determined. The gamma spectrum is being studied using two sources of different isotopic composition. Definite peaks were established at 76, 260, 300, 575, and 9l0 kev. Various multiple coincidence experiments … more
Date: July 30, 1963
Creator: Eichelberger, J.F.; Grove, G.R. & Jones, L.V.
Partner: UNT Libraries Government Documents Department
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Valve Stem Freeze Seal for High-Temperature Sodium

Description: Valve stem freeze seals for high-temperature service in advanced sodium- cooled reactor systems were studied. An experimental model, suitable for use with a 6-in. size valve, operated satisfactorily under a variety of conditions. The freeze seal region was cooled by natural convection to ambient atmosphere; cooling by both circumferential and longitudinal finned sections was experimentally studied. The operating conditions included sodium bulk temperatures up to 1300 tained F, sodium pressures … more
Date: July 30, 1960
Creator: McDonald, J.S.
Partner: UNT Libraries Government Documents Department
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THERMAL EXPANSION OF SNAP MATERIALS

Description: Thermal expansion characteristics were determined for fuel-moderator, reflector, cladding, and engineering erials within the SNAP-2 core vessel. Values were denined for AISI Type 347 stainless steel, Hastelloy N, Zr, ZrH, and zirconium --uranium hydrides, from room temperature to temperatures greater than 1300 deg F. Derived equations were calculated for these materials, using a least squares analysis. Thermal expansion coefficients for the temperature range of 77 to 1200 deg F are: 10.34 x 10/… more
Date: July 30, 1961
Creator: Watrous, J.D.
Partner: UNT Libraries Government Documents Department
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