Resource Type
Serial/Series Title
NACA Research Memorandums
493
NACA Technical Notes
273
Atomic Energy Commission Reports
170
Oak Ridge National Laboratory Reports
152
CF (Series)
138
United States Geological Survey Reports
79
Trace elements investigations report
67
University of California Radiation Laboratory Reports
60
NACA Technical Reports
30
United States Bureau of Mines Reports
23
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Precise Vapor Pressure Measurement At High Temperature
"An apparatus using a silica Bourdon gage is described for the measurement of vapor pressures or dissociation pressures with an accuracy of 0.1 mm and 0.1 deg C up to maximum pressures of atmospheric or beyond and maximum temperatures of 650 to 1250 deg C. The method is applicable to corrosive substances, to substances whose vapor pressure is sensitive to slight changes in composition, and to substances difficult to purify of volatile contaminants which affect the vapor pressure."
Date:
November 1, 1957
Creator:
Machol, Robert E.
Object Type:
Report
System:
The UNT Digital Library
Transient Beam Loading In Linear Electron Accelerators
"The subject of beam loading in linear electron accelerators has been discussed. With suitable design it is possible to place the equilibrium electron phase angle well ahead of the crest of the traveling wave in the accelerator. With beam loading the equilibrium position will move toward the crest, but the electron energy will remain constant or nearly so over a considerable range of loading. Some loss in energy will result from moving the equilibrium phase angle off the wave crest but the spread in energies due to beam loading should be reduced.
Date:
May 1957
Creator:
Neal, R.B.
Object Type:
Report
System:
The UNT Digital Library
Zircex Kinetics And Uranium Loss Study
"A study was made of the effects of temperature, impurities in the hydrogen chloride, flow rates, and niobium content on both the reaction rates and insoluble uranium losses in the Zircex Process is presented."
Date:
November 13, 1957
Creator:
Carter, Jr, T. J. & Stone, R. A.
Object Type:
Report
System:
The UNT Digital Library
Radiation Damage to Vacuum Chamber Walls
"The problem of radiation derange to the walls of two types of vacuum chamber for the 6 Bev Cambridge Electron Accelerator was studied. Radiation damage may arise from the synchrotron radiation and from electrons which are not accepted at injection. The synchrotron radiation produces a large amount of secondary x radiation which is isotropic, and therefore complicates the arrangement of internal shielding. The 20 Mev electrons from the lines cannot be attenuated by shielding. It is concluded that dosages of the order of 10/sup 7/ rad/day near the inflector are unavoidable. This would exceed the allowable dosage for a tube made by cementing a stainless steel liner to supporting ribs, and also exceed the test dosages (so far as we know) for alumina ceramics."
Date:
September 10, 1957
Creator:
Stearns, Brenton
Object Type:
Report
System:
The UNT Digital Library
Dynamic B and n-Behavior Up to 7600 Gauss in Magnet Model Mark Ii Comparison of Results With Long and Small Grad Coils
"Magnetic measurements were performance at excitation levels ranging from 4000 to 7600 gauss, to study the dynamic behavior of the magnetic and gradient lengths of the CEA magnet sectors. The influence of the proposed metal vacuum chamber on field and gradient was experimentally determined. Results of measurements made with a 26 in. long grad coil and with small circular grad coils are compared. The reliability of the 26 in. long grad coil is demonstrated."
Date:
August 13, 1957
Creator:
Henri, Victor Philippe & Nysater, H.
Object Type:
Report
System:
The UNT Digital Library
Injection Trajectories and Beam Matching for the Cambridge Electron Accelerator
"ABS>Injection trajectories were calculated for different injection conditions for the Cambridge Electron Accelerator, considering also the effect of magnetic fringing fields. The general problem of matching the emittance of the linac to the acceptance of the synchrotron in the transversal phase space is considered, and it is shown that this can be done by a set of two quadrupole lenses. In order to eliminate rudial betatron oscillations due to energy deviations of the injected particles, a pulsed electric quadrupole lens in the synchrotron in combination with two deflectors between linac and synchrotron can be used to place particles of different energies on their specific equilibrium orbits. A layout of the whole injection system following the output of the linac is given."
Date:
April 17, 1957
Creator:
Steffen, Klaus G.
Object Type:
Report
System:
The UNT Digital Library
A Report on the Kinematics of High Energy Electron Scattering
"A convenient summary is given of useful formulas on the kinematics of high energy electron scattering together with a derivation of the relevant formulas for transforming from the center of mass to the laboratory system such parameters as scattering cross sections. The formulas derived hold for any two- body collision: the approximation (m = 0) employed for the electron scattering calculations is rigorously true for the elastic scattering of photons."
Date:
May 23, 1957
Creator:
Bernstein, Jeremy
Object Type:
Report
System:
The UNT Digital Library
Amplitude and Phase Functions for the Revised Parameters of the Cambridge Electron Accelerator
"The phase and amplitude functions describing the betatron oscillations in the synchrotron are calculated using the revised parameters of the Cambridge Electron Accelerator. The results are given numerically and plotted in a graph for one machine period."
Date:
May 27, 1957
Creator:
Lanza, G.
Object Type:
Report
System:
The UNT Digital Library
Notes on the A-2-Compiler System
"An account is given of an extensive study of the A-2 Compiler System for the Remington Rand Univac digital computer. In particular, the following topics are discussed: application and performance of subroutines, segmenting, and introduction of subroutines to the library."
Date:
July 15, 1957
Creator:
Lanza, G. &
Object Type:
Report
System:
The UNT Digital Library
Effect of Quadrupole Lenses
"The effect of correcting quadrupole lenses on the betatron oscillation characteristics of an AG synchrotron was studied, and general formulas are given for the fractional changes of the amplitude and phase functions. Calculations performed for different setups of different numbers of lenses for the CEA synchrotron structure point out that one may correct for sizable errors in the n- value by means of 8 pairs of quadrupole lenses in two consecutive straight sections with the focusing lens between defocusing sectors and vice versa. An increase of BETA /sub max/ of about 5% is obtained for DELTA n/n approximately 0.04. It was found that the necessary corrections can probably be obtained satisfactorily with lenses of 6 in. length. "
Date:
June 3, 1957
Creator:
Lanza, G. & Steffen, Klaus G.
Object Type:
Report
System:
The UNT Digital Library
Pole-Face Windings
"A summary is presented of a preliminary study of the application of pole- face windings to the Cambridge Electron Accelerator. Estimates are made of the currents required, the forces on the wibdings and the voltages induced by the magnetic flux. The possibility of automatic control of the pole-face currents in explored, and feasible control systems are suggested."
Date:
June 20, 1957
Creator:
Rees, John
Object Type:
Report
System:
The UNT Digital Library
Betatron Oscillation Frequency Shift Due To "N-Errors"
"Expressions are found to relate DELTA gamma to the n-errors.'' It is demonstrated that the integral n-value concept'' is of no use in the present case. A modification of integrated n-value'' is suggested."
Date:
July 1, 1957
Creator:
Lanza, G. & Steffen, Klaus G.
Object Type:
Report
System:
The UNT Digital Library
Effect of Atomic Interaction Potential on Defect Production in Metals
The cascade of displaced atoms in metals, induced by high energy radiation, has been investigated, with the assumption of a screened coulomb interaction between atoms. The problem was treated stochastically on an IBM 650 electronic computer for several different models. The comparison of our results with those for which a hard sphere interaction has been used shows only a slight decrease in the expected number of atomic displacements.
Date:
1957
Creator:
Brown, E. & Goedecke, G. H.
Object Type:
Report
System:
The UNT Digital Library
Drying of Charcoal Used for Adsorption of Gaseous Fission Products from Homogeneous Reactors
In homogeneous nuclear reactors significant quantities of radioactive inert gaseous fission products must be separated from the fuel solution for disposal. The present disposal scheme, which is employed on the HRT, is to pass the mixture of fission product gases and oxygen through a charcoal adsorption bed. the oxygen passes through the bed relatively un-adsorbed, but the radioactive inert gases are adsorbed and are displaced from the bed bed very slowly giving the gases a much greater residence time than would exist if no bed were used. This long residence or "holdup" time permits the short-lived inert gases to decay away before emission to the atmosphere and thus greatly reduces the safety hazard produced by disposal of the gases to the atmosphere. The same effect could be obtained by using a large holdup tank, but the charcoal bed is much more compact and thus required less shielding.
Date:
December 20, 1957
Creator:
Funderburg, J. M. & Moss, L. I.
Object Type:
Report
System:
The UNT Digital Library
The Chlorine Trifluoride-Hydrogen Fluoride System. Some Vapor Pressure and Conductance Measurements
The possible existence of a stable complex between chlorine trifluoride and hydrogen fluoride made further study of this system desirable. We have therefore investigated the vapor pressures and specific conductances of solutions of hydrogen fluoride in chlorine trifluoride.
Date:
1957
Creator:
Rogers, Max T.; Speirs, John L. & Panish, Morton B.
Object Type:
Report
System:
The UNT Digital Library
Effect of Core Corrosion Sample Assembly on HRT Critical Concentration
An estimate has been made of the critical fuel concentration in the HRT, taking into account the effect of the core corrosion sample assembly. The estimate is based on a number of previous calculations of critical concentration in an un-poisoned reactor and one calculation of critical concentration as a function of poison level. The makeup of the first core corrosion sample assembly was used in calculating equivalent neutron poisoning effects. Figure 1 shows the estimated critical concentration as a function of temperature with the corrosion sample assembly in place. At 280°C, the assembly raises the critical concentration by 0.6 g U-235/kg D2O. This effect is equivalent to a uniformly distributed poison equal to 4.1% of the fission cross section. The equivalent poison is greater at lower temperatures, where the uranium concentration is lower.
Date:
July 18, 1957
Creator:
Haubenreich, Paul N.
Object Type:
Report
System:
The UNT Digital Library
Nuclear Computations for HRE-3 Design : Equilibrium Results
Various nuclear characteristics of two-region spherical homogeneous reactors have been computed in order to provide information for the design of HRE-3. Equilibrium isotope concentrations were established using an ORACLE code, and a two-group model was used to obtain critical concentrations and flux distributions. Breeding ratio is plotted as a function of reactor size, blanket thorium concentration, and other design and operating parameters, and the time required for a demonstration breeding is discussed. Tables of results, including neutron balances, are given for selected reactors. a number or relations are presented for estimating the effects of fission products, copper, corrosion products, H2O, and the core tank on breeding ratio.
Date:
July 10, 1957
Creator:
Rosenthal, M. W. & Fowler, T. B.
Object Type:
Report
System:
The UNT Digital Library
Radiation Level in the Stator Region of the HRT Fuel Circulation Pump
The gamma dose rate in the motor region of the HRT fuel circulation pump was measured with the pump scroll full of radioactive solution. Extrapolation of the data to the solution activity expected in the pump under normal operation gives a dose rate well below that which would result in excessive gas production in the stator can within the life of the pump. The above dose rate does not include the effects of fast neutrons from the fuel solution or of the general cell radiation level in the vicinity of the pump. It appears that the possibility of gas production in the stator from the cell background radiation is sufficiently great to warrant the installation of a shield around the outside of the motor end of the fuel circulating pump.
Date:
July 3, 1957
Creator:
Engel, J. R.
Object Type:
Report
System:
The UNT Digital Library
A Preliminary Study of Pre-Solvent Extraction Treatment of Stainless Steel-Uranium Fuels with Dilute Aqua Regia
The continuous dissolution of 304 stainless steel and stainless steel-UO2 alloy in dilute aqua regia was studied with subsequent stripping of the dissolver product to remove chloride ion. The process has the advantage of producing, by means of a simple head end treatment, a solvent extract feed in a conventional nitric acid medium so that existing solvent extraction processes, materials of construction and waste disposal methods can be used. The purposes of this study were to investigate the variables affecting the dissolution process and to obtain dissolver scale-up data, and to investigate the removal of chloride from the dissolver product and the variables affecting the stripping operation. A continuous flooded pot dissolver was used. It has the advantages of stability of operation and ease of control in comparison with column dissolvers and requires a minimum of mechanical processing prior to dissolution. Stripping of the dissolver product to remove chloride ion was studied in a 4-in. diameter Pyrex bubble-cap column containing 12 single bubble cap plates. Continuous dissolution rates and dissolver product stainless steel loading were correlated with aqua regia feed composition, acid feed rate and surface area exposed to reaction. Profiles of chloride concentration down the stripping column were obtained …
Date:
October 11, 1957
Creator:
Kitts, F. G. & Perona, J. J.
Object Type:
Report
System:
The UNT Digital Library
Performance of HRT Charcoal Beds
The expected performance of the HRT carbon beds was calculated for various reactor operating conditions. the calculations indicated that the flow rate of sweep gas will have to be limited to prevent excessive activity discharge. Data on activity discharge are included.
Date:
June 4, 1957
Creator:
Weeren, Herman O. & Lee, John (W. John)
Object Type:
Report
System:
The UNT Digital Library
Testing of Adsorptive Capacity of Charcoal Beds : HRT Test No II-A 10 b
During the pre-startup phase of the HRT operations, moisture was accidentally introduced into the charcoal bed adsorbers in the off-gas system. Tests have been made to determine the effect of wetting upon the adsorptive properties of the charcoal. The work was divided into two phases, testing of fresh charcoal in the laboratory and testing of the HRT charcoal beds in situ. It is recommended that the beds be dried by heating them to about 40 C and purging each with one to two liters/min of dry instrument air.
Date:
June 4, 1957
Creator:
Van Winkle, R. & Wiethaup, R.R.
Object Type:
Report
System:
The UNT Digital Library
Compilation of Various Undocumented Classified Memoranda on Sherwood Program
This compilation includes the following subjects: (1) Spectroscopic studies, (2) Neutral carbon in the vacuum carbon arc, (3) Anode effects, doppler blast effects, and stark broadening, (4) Neutrals in the high-current carbon arc; (5) Photon breakup of N2 in the high-current carbon arc, (6) Ion density in the high current carbon arc, and (7) Recombination cross-section for fast hydrogen ions and slow electrons. Minor revisions have been made in the subject memoranda in incorporating them in the compilation.
Date:
June 28, 1957
Creator:
McNally, J. Rand (James Rand), 1917-
Object Type:
Report
System:
The UNT Digital Library
Hedstrom Plot for the Calculation of Laminar Flow Pressure Drop for the Bingham Plastic Materials with Hedstrom Numbers from 0 to 10(15)
The results of a machine calculation of a modified Fanning-friction-factor Hedstrom plot for Hedstrom numbers from 0 to 10(10) are presented in graphical and tabular form.
Date:
June 20, 1957
Creator:
Thomas, D. G.
Object Type:
Report
System:
The UNT Digital Library
In-Reactor Autoclave Corrosion Studies II : Autoclave Z-19
In order to test the effect of chromate ion on the corrosion of Zircaloy-2 a 0.04 m uranyl sulfate solution (enriched) containing added acid, copper sulfate and 557 ppm Cr (VI) was autoclaved with rocking at 280 C for about eight days in the HB-5 facility of the LITR. The average corrosion rate established by the a rate of consumption of oxygen was 9.9 mpy at a power density of 4.9 w/ml. It is indicated by comparison with a previous corrosion study under LITR radiation that the presence of Cr (VI) had no significant effect on the radiation corrosion of Zircaloy-2 by enriched uranyl sulfate solutions. However, the data are not conclusive and may be interpreted as showing a low corrosion rate for a limited period (i.e. a short term inhibition) followed by a correspondingly rapid corrosion.
Date:
March 22, 1957
Creator:
Warren, K. S.; Davis, R. J. & Jenks, G. H. (Glenn Herbert), 1916-
Object Type:
Report
System:
The UNT Digital Library