Resource Type
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Serial/Series Title
Atomic Energy Commission Reports
185
University of California Radiation Laboratory Reports
90
Hanford Works Reports
79
HW (Series)
54
UCRL (Series)
44
Oak Ridge National Laboratory Reports
39
BNL (Series)
24
Brookhaven National Laboratory Reports
24
General Electric Company Atomic Power Reports
24
CF (Series)
19
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Neutron Dosimetry in and Around Human Phantoms By Use of Nuclear Track Emulsion
The validity of the nuclear track emulsion technique for fast-neutron dosimetry is examined in the exposure of a human phantom to PuBe neutrons, Semiautomatic track scanning and high-speed data analysis obviate the major disadvantages of emulsion dosimetry, and allow the absolute differential proton track energy spectrum at various locations in the phantom to be obtained without a serious cost in time. From this are calculated the total absorbed local tissue dose due to proton recoils and the local thermal neutron intensity during irradiation.
Date:
April 1962
Creator:
Akagi, Hiroaki & Lehman, Richard L.
Object Type:
Report
System:
The UNT Digital Library
A Study of the Effects of Some Spray Column Variables on Radiant-Heat Transfer in Spray Calcination
Calcination of liquid radioactive wastes, the process of converting metal nitrates and sulfates to oxides by heat, is under development at Hanford as a means of reducing these liquids to a dry powder or solid which can be stored safely. Radiant-heat spray calcination, one of the methods under study, was first investigated at the Oak Ridge K-25 Plant (1) as a possible method of calcining uranyl nitrate to uranium trioxide. The process has also been under extensive development at the Pulp and Paper Research Institute of Canada (2) and is designated by them as the Atomized Suspension Technique.
Date:
April 28, 1960
Creator:
Allemann, Rudolph Theodore
Object Type:
Report
System:
The UNT Digital Library
Evidence For a T = 0 Resonance in the Z[ ] System
In previous letters we have reported a Av resonance, called Y*1, observed through the study of the interaction of 1.15-Bev/c K* mesons in hydrogen in the Lawrence Radiation Laboratory 15-in. bubble chamber. We now wish to report the results of the study of the three reactions [formula](1), [formula](2) and [formula](3).
Date:
April 28, 1961
Creator:
Alston, Margaret H.; Alvarez, Luis W., 1911-1988; Eberhard, Phillippe; Good, Myron L.; Graziano, William; Ticho, Harold K., 1921-2020 et al.
Object Type:
Report
System:
The UNT Digital Library
The [Sigma/Alpha] Branching Ratio Of [Y*1]
Recently a T=1 resonance in the [Alpha w] system called [Y*1] has been observed with a mass of 1385 Mev. Two types of resonances have been predicted that might relate this observation to other elementary-particle interactions: (1) P 3/2 resonances in the Alpha w and Sigma w systems predicted by global symmetry corresponding to the (3/2, 3/2) resonance of the wN system, (2) a spin-1/2 Y-w resonance resulting from a bound state in the KN system. The position and width of the observed [Y*1] resonance agree with both theories but since the spin and parity have not yet been determined, it is impossible at present to distinguish between the two theoretical interpretations.
Date:
April 25, 1961
Creator:
Alston, Margaret H.; Alvarez, Luis W., 1911-1988; Eberhard, Phillippe; Good, Myron L.; Graziano, William; Ticho, Harold K., 1921-2020 et al.
Object Type:
Report
System:
The UNT Digital Library
Sodium Mass Transfer: III - The Application of Liquid Ammonia as a Sodium Leaching Agent
A technique is presented for liquid ammonia leaching of metallic sodium from corrosion coupons, filter elements, and sodium samples to reveal contaminants and impurities.
Date:
April 1962
Creator:
Alter, H. W. & McManus, P. A.
Object Type:
Report
System:
The UNT Digital Library
Potential Nitrate Decomposition High Level Waste Storage
It is recommended that self-concentration of Purex wastes should not be started until much more complete knowledge is obtained of the conditions and reactions in these wastes. The presently planned tests in the Semi-Works will be a practical demonstration of the problems but will be of little value on the initial Purex wastes as these tests are being run almost concurrent with the filling of the first Purex storage tank.
Date:
April 27, 1955
Creator:
Anderson, C. R.
Object Type:
Report
System:
The UNT Digital Library
Irradiation of Powder Metallurgy Plates
From abstract: "Four plates of uranium that were fabricated by powder metallurgy techniques and clad with 1100 aluminum by hot pressing were irradiated in the Materials Testing Reactor. Increases of about one-half per cent in length and one per cent in thickness were observed after exposure of 1600 megawatt days per ton. The surfaces of the plates remained smooth."
Date:
April 1957
Creator:
Angerman, C. L.; Douglass, D. L. (David Leslie), 1931-; Marshall, R. P. & Caskey, George R., Jr.
Object Type:
Report
System:
The UNT Digital Library
Particle Distribution From a Unit Source - Part A
Thus we see that the derivation of elementary age theory is based on replacing the probability of collision governed by the Milne kernel by a Gaussian probability having the same zeroth and second moments. It is apparent that the age theory distribution will fail close to the source and at many free paths from the source.
Date:
April 29, 1955
Creator:
Anthony, G. W.
Object Type:
Report
System:
The UNT Digital Library
Neutron Remote Area Monitoring Systems
The following report records measurements and evaluations of fast neutron levels in remote areas monitored by personnel.
Date:
April 25, 1958
Creator:
Appleby, Charles W.
Object Type:
Report
System:
The UNT Digital Library
The Machinability of Beryllium
The following report investigates the isolation of the cause of the unusual tool-wear rates found in machining beryllium as attributed to an inherent characteristic of beryllium, or an effect of inclusions in beryllium, as well as the evaluation of the comparative machinability of the various types of beryllium.
Date:
April 30, 1949
Creator:
Armstrong, E. T.; Dayton, Russell Wendt & Dawes, R. C.
Object Type:
Report
System:
The UNT Digital Library
The Adsorption and Surface Reactions of Hydrocarbons on Clean Iridium
From abstract: "The adsorption of ethane, ethylene and acetylene on clean iridium in a field emission microscope has been found to cause characteristic changes in the work function of the iridium surface. Further changes, which are time and temperature dependent, result when such surfaces are heated. Flash filament experiments have shown that the changes in work function upon heating are due to desorption reactions and that the desorbed product consists principally of hydrogen. By assuming a linear relationship between surface coverage and work function, it has been possible to determine the desorption kinetics from the observed rates of work function change at various temperatures. The results are consistent with a mechanism involving stepwise surface dehydrogenation in which a pair of hydrogen atoms is removed from the hydrocarbon molecule in each step, followed by desoption of the adsorbed hydrogen. At very high temperatures the remaining carbon atoms are removed, presumably by evaporation."
Date:
April 7, 1962
Creator:
Arthur, John R., Jr. & Hansen, Robert S.
Object Type:
Report
System:
The UNT Digital Library
Equilibria in the Oxide Systems of Praseodymium and Americium
The thermal decomposition of the higher oxides of praseodymium and americium have been investigated.
Date:
April 14, 1949
Creator:
Asprey, L. B. & Cunningham, Burris Bell, 1912-1971
Object Type:
Report
System:
The UNT Digital Library
Pile Periods and the Inhour Equation Accounting for Delayed Neutron Groups from Fission of U²³⁵ and Pu²³⁹
Calculations are presented regarding the effect of delayed neutrons in reactors fueled with mixtures of Pu²³⁹ and U²³⁵. Results are plotted to illustrate the change in thermal flux as a function of time for various positive or negative step changes in reactivity.
Date:
April 27, 1956
Creator:
Astley, E. R.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of Aluminum for use in Reactors Cooled by High-Temperature Recirculating Water
aluminum has been considered as a material for cladding fuel elements to be used in reactors cooled by high-temperature recirculating water. Aluminum is abundant, chap, has a relatively low cross section for thermal neutrons, and is readily fabricated into complex shapes. For these reasons, it appears that the use of aluminum rather than steel, Zircaloy or other candidate materials for fuel element cladding, would result in considerable savings in operating expense. The actual economics will of course depend on specific factors such as core materials and design of the reactor/. Aluminum appears particularly attractive for cladding the cores of aluminum-plutonium alloy proposed for the Plutonium Recycle Test Reactor since, in this case, the physical characteristics of the core and cladding would be practically identical.
Date:
April 5, 1960
Creator:
Ayres, J. A.
Object Type:
Report
System:
The UNT Digital Library
Liquid Metal Fuel Reactor Experiment Monthly Progress Statement: April 1957
A monthly report summarizing work perform by Babcock & Wilcox personnel for the U.S. Atomic Energy Commission. In this monthly report information on the reactor design No. 10 had been selected as the LMFRE preliminary reference design, various shielding designs have bee studied, various calculations on multiregion code and reactivity have been continued, and other related to the LMFRE
Date:
April 1957
Creator:
Babcock & Wilcox Company
Object Type:
Report
System:
The UNT Digital Library
Absolute Cross Sections for Secondary Particles Produced in High-Energy Nuclear Bombardments
From abstract: Absolute cross sections for the production of charged secondary particles is the bombardments of aluminum, nickel, silver, and gold by 332-Mev protons, 187-deuterons, and 380-Mev alpha particles have been determined.
Date:
April 20, 1956
Creator:
Bailey, L. Evan
Object Type:
Report
System:
The UNT Digital Library
Acid Formation in the Radiolysis of Phosphorus Esters
The radiolytic decomposition of tributyl phosphate has been show by burr to product gases, acids, and polymers. the acids that are formed can limit the usefulness of tributyl phosphate for the processing of radioactive materials. The study of acid formation on radiolysis therefor becomes important to us for the understanding of the mechanism of acid formation, the influence of added materials and the effect of the structure of organo- phosphorous compounds. Samples of purified esters have been irradiated in the ORNL cobalt source. Conclusions: (1) The formation of acid from tributyl phosphate during irradiation with cobalt gamma rays involves a mechanism that is not a primary step. Evidence has been obtained for a secondary reaction that is minimized by the presence of certain compounds. (2) Toluene acting as an inhibitor for radiolytic formation of acid may indicate the usefulness of an aromatic hydrocarbon diluent in processing. (3) The aromatic hydrocarbon, when phenyl, was not effective when it was part of the molecule. (4) First tests revealed that dibutyl butyl-phosphonate produced less acid the TBP and may warrant further consideration for process application.
Date:
April 3, 1957
Creator:
Baldwin, W. H.
Object Type:
Report
System:
The UNT Digital Library
Thermal Hydraulic Bases for Selected PRTR Process Specifications
This document presents the bases for those PRTR Process Specifications involving considerations of heat transfer and fluid flow. It will be noted that some of the bases incorporate information gained from laboratory experiments with electrically heated test sections simulating PRTR fuel elements. These experiments are described in some detail elsewhere.
Date:
April 1, 1960
Creator:
Batch, J. M. & Ambrose, T. W.
Object Type:
Report
System:
The UNT Digital Library
A Fast Coincidence Circuit with Pulse Height Selection
Abstract: The output signal of a linear accelerator may have a rise time of 1-2 x 10[minus]7 seconds. Therefore, the output of a pulse height selector operating on this signal has a variation of delay from the original signal of about this amount. In the instrument to be described in this technical report this difficulty is largely resolved.
Date:
April 22, 1947
Creator:
Bell, P. B.; DeBenedetti, Sergio & Francis, J. B., Jr.
Object Type:
Report
System:
The UNT Digital Library
The Effect of Thermal Cycling on the Thermal Transfer from a Sand Blasted Slug to an Unbonded Jacket
Abstract. Measurements were made to determine the effect of thermal cycling on heat transfer from slug to jack using a slug with a sand blasted surface. The value of the transfer coefficient h decreased from initial values ranging from 10 to [formula], to values and [formula] after 1700 cycles, and to a range of 0.15 to 0.45 [formula] after 3200 cycles. Comparisons are made with the results found for slugs with different surfaces.
Date:
April 2, 1945
Creator:
Bentley, Robert R.
Object Type:
Report
System:
The UNT Digital Library
A Method for Monochromatizating and Precise Point Focusing of X-Rays and its Application in Low Angle Diffraction Studies
A principle for bending crystals with a minimum of strain so that they will focus x-rays and gamma-rays accurately to a point is explained. Detailed calculations are made of the aberrations in the foci resulting from various applications of the principle. the application of the principle in making a point focusing monochromator for low angle x-ray diffraction studies is discussed, and theoretical and experimental determinations of the reflection coefficient of the crystal are compared. A few experiments in low angle diffraction from biological materials using the new monochromator are described, and the results are compared with those obtained using other instruments.
Date:
April 1955
Creator:
Berreman, Dwight Winton
Object Type:
Report
System:
The UNT Digital Library
Physical Properties of High Density Concrete
The purpose of this report is to summarize the work done at KAPL on physical properties of high density concretes.
Date:
April 10, 1950
Creator:
Blinder, W.
Object Type:
Report
System:
The UNT Digital Library
Contained Nuclear Detonations in Four Media - Geological Factors in Cavity and Chimney Formation
Recent underground nuclear tests conducted by the U.S. Atomic Energy Commission have yielded data on the effects of contained nuclear explosions in four rock mediums: tuff, alluvium, rock salt, and granite. This report presents and compares data obtained primarily through exploratory mining and drilling into the postshot environment of 35 such events.
Date:
April 24, 1964
Creator:
Boardman, Charles R.; Rabb, David D. & McArthur, Richard D.
Object Type:
Report
System:
The UNT Digital Library
Pressure Rise in HRT Shield Due to Reactor and Replacement heat Exchanger Rupture
.Recalculations were made of HRT cell pressures in the event of a simultaneous rupture of the reactor core vessel and the fuel and blanket heat exchangers. These calculations will be applicable after the replacement fuel heat exchanger is installed. The pressure rise in the cell is plotted as a function of time. A maximum cell pressure of 34 psig is achieved ~7 sec after rupture.
Date:
April 2, 1957
Creator:
Bolger, J. C.; Maak, R. O. & Gift, E. H.
Object Type:
Report
System:
The UNT Digital Library