Resource Type
Serial/Series Title
NACA Research Memorandums
180
Atomic Energy Commission Reports
52
NACA Technical Reports
27
University of California Radiation Laboratory Reports
26
Hanford Works Reports
22
HW (Series)
19
Oak Ridge National Laboratory Reports
19
UCRL (Series)
14
BNL (Series)
13
Brookhaven National Laboratory Reports
13
59 More
Country
States
Decade
Month
Day
353 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
353
next
Response Plan for Volcano Hazards in the Long Valley Caldera and Mono Craters Region, California
A report about volcano response plans. It discusses a four-level color code with successive conditions. For instance, green means no risk while red means an eruption is occurring.
Date:
September 24, 2001
Creator:
Hill, David P.
Object Type:
Report
System:
The UNT Digital Library
Classification of Wetlands and Deepwater Habitats of the United States
From foreword: "This report represents the most current methodology available for wetland classification and culminates a long-term effort involving many wetland scientists."
Date:
September 24, 1985
Creator:
Cowardin, Lewis M.; Carter, Virginia; Golet, Francis C. & LaRoe, Edward T.
Object Type:
Book
System:
The UNT Digital Library
Annual Technical Progress Report, AEC Unclassified Programs: Fiscal Year 1968
Annual report with the objectives of evaluating, producing, and maintaining an up-to-date set of basic nuclear data; producing and evaluating multigroup constants; and improving of present day methods of neutronic calculations as related to microscopic and macroscopic nuclear data, for unclassified research sponsored by the U.S. Atomic Energy Commission during FY 1968.
Date:
May 24, 1969
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Quarterly Technical Progress Report, AEC Unclassified Programs: Fiscal Year 1968
Quarterly report with the objectives of evaluating, producing, and maintaining of an up-to-dat set of basic nuclear data; producing and evaluating of multigroup constants; and the improvement of present day methods of neutronic calculations as relates to microscopic and macroscopic nuclear data, for unclassified research sponsored by the U.S. Atomic Energy Commission during FY 1968.
Date:
May 24, 1969
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Doppler and related measurements in a soft fast-reactor spectrum
This report deals with a group of both theoretical and experimental investigations which have been carried out, utilizing Core 15, one in a series of critical assemblies that have been constructed at Atomics International's Epithermal Critical Experiments Laboratory (ECEL).
Date:
March 24, 1969
Creator:
Springer, T. H.; Tuttle, R. J.; Otter, J. M. & Pachall, R. K.
Object Type:
Report
System:
The UNT Digital Library
Calculation of Explosion-Produced Craters
In this study, a physical-numerical model is used to investigate processes important for cratering, or excavation, physics for high-explosive sources in desert alluvium. High explosives do not vaporize much of the geological environment surrounding the initial cavity containing the explosive. Thus, a relatively simple, and in some cases a well-known, equation of state exists for the high-explosive cavity gas for pressure greater than 1 atmosphere. However, nuclear explosives are known to vaporize a great deal of surrounding geological environment during the early part of cavity life history. This vaporized material is believed to condense late in the life history of the cavity, and prior to vent of the cavity gas to the atmosphere, such that the latent heat of condensation plays an important role in nuclear excavation. So far, no numerical-physical models of the response of a geologic environment to a nuclear explosive includes the effect of condensation on the hydrodynamics of late times. Thus, the calculation of the cavity pressure at late times including the effect of condensation is one of the current unsolved problems in the calculation of a crater formed by nuclear explosives. This study, then, develops a predictive, numerical-physical model for H.E. sources of the cavity …
Date:
April 24, 1964
Creator:
Knox, Joseph B. & Terhune, R. W. (Robert William)
Object Type:
Report
System:
The UNT Digital Library
Calculation Of The Shock Wave From An Underground Nuclear Explosion In Granite
In any underground nuclear explosion, the shock front that propagates from the shot point carries with it energy from the explosion, and distributes this energy by doing work on the surrounding material. In the process, the material undergoes changes in both its physical and mechanical states. If enough energy is deposited in the material, it will vaporize or melt thus changing its physical state, or cause it to crush or crack. During the past few years, special computer codes have been developed for predicting the close-in phenomena of underground nuclear explosions using the laws of physics, and the knowledge of the properties of the materials in which the detonations occur. As a consequence, a better understanding of experimental observations and measurements has evolved.
Date:
April 24, 1964
Creator:
Butkovich, Theodore R.
Object Type:
Report
System:
The UNT Digital Library
Characteristics Of Radioactivity Produced By Nuclear Explosives
The production of energy by nuclear reactions results in the production of radioactive nuclei. Therefore, in considering the possible utilization of nuclear explosives for peaceful purposes it is necessary to be able to predict the expected activities, their amounts, and dispositions. The amounts and kinds of radioactivities produced by detonation of a nuclear explosive are dependent upon the specific design of the explosive. The behavior and ultimate fate of the activities produced by the explosion depend on the composition of the medium in which the detonation occurs, the nature of the detonation, and the chemical species involved.
Date:
April 24, 1964
Creator:
Miskel, John A.
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
Development of Pulsed Neutron Application to Power Reactor Start-Up Procedures. Seventh and Eighth Quarterly Progress Report, October 1, 1963-March 31, 1964
Activities in a program to develop techniques in the use of pulsed neutron sources to measure shutdown parameters related to large thermal power reactors are reported. In the course of this program, a new theory was suggested and an experimental apparatus was designed and built. Experiments were carried out to test the new model. This present report contains additional data and information extracted from the experiments at PG&E Humboldt Bay Power Reactor at Eureka, California. During the last days of 1963 a number of control rod and fuel bundle worth measurements were made in the ESADA Vallecitos Experimental Superheat Reactor (EVESR) using the (k[beta]/[script l] technique. A description of the experiments is given in the text of the report and some results are reported. A computer program was written to perform the data analysis of the pulsed neutron experiments and the code is discussed in the Appendix.
Date:
April 24, 1964
Creator:
Garelis, Edward & Meyer, P.
Object Type:
Report
System:
The UNT Digital Library
The Effects Of Seismic Waves On Structures And Other Facilities
The effects of explosion-induced ground motion must be evaluated in planning and executing any nuclear excavation project. For some projects ground use intensity may dictate the use of less-than-optimum yields to minimize damaging effects. In remote areas, weighing the alternatives of outright purchase of some property or use of smaller yields may be required. The cost of indemnifying owners against damage must be considered in any case. Discussions of the effects of ground motion on three broad types of facilities - engineered structures, residential buildings, and equipment required for the support of nuclear excavation operations - are presented. A method of predicting the response of single- and multi-storied buildings, the response spectrum technique, is discussed, with emphasis on the application of explosion-induced spectra.
Date:
April 24, 1964
Creator:
Cauthen, Lewis J., Jr.
Object Type:
Report
System:
The UNT Digital Library
Heavy Isotope Production By Nuclear Devices
In November 1952 an event took place which was to have a profound effect on political alignments of the world. This event was the detonation of "Mike", the first large thermonuclear device. The political implications of this experiment overshadowed what has come to be a major advance in the development of scientific tools; the experimentally verified, extremely high thermal neutron flux observed in Mike. Subsequent to this observation, the Atomic Energy Commission established a study program to investigate this particular characteristic of nuclear devices. Under the program, Los Alamos Scientific Laboratory and Lawrence Radiation Laboratory, Livermore, have studied the mechanisms of high fluxes, capture systematics, general stability characteristics, and more specifically, nuclear design to accomplish this massive neutron irradiation. Utilization of these greatly increased fluxes can be expected to significantly advance understanding in many fields.
Date:
April 24, 1964
Creator:
Dorn, David W.
Object Type:
Report
System:
The UNT Digital Library
Preburst Resistance and Temperature of Exploding Wires
It has been shown that the time of burst of exploding wires can be predicted from known thermodynamic and electrical properties of the wire materials under some conditions. The mathematical relationships are a set of integrals (transformation time integrals) similar in form to the empirical "action integrals" sometimes used in exploding wire work. This paper discusses the use of the transformation time integrals to calculate the resistance and temperature of a wire as a function of time up to the time of burst and to investigate the effects of environment of the wire on the temperature, resistance, and time of burst.
Date:
February 24, 1964
Creator:
Maninger, R. C.
Object Type:
Report
System:
The UNT Digital Library
Shielding Against Gamma Rays, Neutrons, and Electrons From Nuclear Weapons: A Review and Bibliography
Report discussing the problem of predicting dose rates and of estimating the effectiveness of shielding from radiations resulting from nuclear explosions. A number of calculations and supporting experiments regarding the penetration and diffusion of gamma rays, neutrons, and electrons through air and bulk materials are summarized. Indications are given of gaps in such input information. A selection of 485 references from the unclassified literature is presented, of which 388 are cataloged as to source geometry and energy, absorber material and configuration, type of data presented, and method of calculation or experimental technique. These cataloged references include radiation field studies ranging from the point-source infinite-medium situation up through such complicated geometries as foxholes, shelters, and conventional structures. The other references are of a general or review nature or contain input spectral data.
Date:
February 24, 1964
Creator:
Hubbell, J. H. & Spencer, L. V.
Object Type:
Report
System:
The UNT Digital Library
Integral Neutron Thermalization, Annual Summary Report: October 1962-September 1963
Introduction: This report describes the Integral Neutron Thermalization activities at General Atomic from October 1, 1962, through September 30, 1963.
Date:
January 24, 1964
Creator:
Beyster, J. R.; Brown, J. R.; Koppel, J. U.; Neill, J. M.; Russell, J. L., Jr.; Trimble, G. D. et al.
Object Type:
Report
System:
The UNT Digital Library
Effect of Long-Range Interactions on Order
Harrison and Paskin (HP) have calculated the ordering energy of β-CuZn using recent theoretical techniques of treating electron screening and Mott's polar model of an alloy. Good agreement is obtained between the calculated total energy of the order-disorder transformation and specific heat measurements. A consequence of the HP calculation is that the ordering energy is long-range and oscillates in sign. Walker and Keating recently measured the neutron diffuse scattering of β-CuZn above the critical temperature Tc and find their data is in agreement with order calculated by only considering a nearest neighbor interaction. Using the Cowley statistical theory of order, we compare the order generated by a nearest-neighbor interaction and the long-range interaction of HP at a temperature 1.1Tc. we find the average behavior of the order generated by the nearest-neighbor and long range interaction to be similar, The major difference is the nearest-neighbor interaction generates order that asymptotically, varies smoothly with neighbor distance whereas the order resulting from the long-range interaction fluctuates markedly about the nearest-neighbor generated order. This result may explain the success of statistical theories, based on nearest-neighbor interactions, in both order-disorder of alloys as well as in some magnetic systems which are also believed to have …
Date:
December 24, 1963
Creator:
Paskin, Arthur
Object Type:
Report
System:
The UNT Digital Library
Light-Droven Cytochrome Reactions in Anacystis and Euglena
The basic similarity in cytochrome physiology between Anacystis nidulans ad Euglena gracilis, strains Z, is impressive in view of their gross dissimilarities in size, structure, and pigment content. We have investigated the cytochrome reactions by sensitive spectrophotometric methods in order to gain some insight into the patterns of energy transfer from the various light receptors to the reaction centers involved in the two photochemical reactions of green plant photosynthesis and also to elucidate the pathways of photosynthetic electron transfer. The major thrust of this presentation will be the implications of experiments on whole cells in which both wavelength and intensity of monochromatic actinic light have been systematically varied. Some preliminary observations of the effect of carbonyl cyanide-m chlorophenylhydrazone (CCCP) are presented, and the light-driven reduction of cytochrome b6 in Euglena chloroplast fragments is described.
Date:
December 24, 1963
Creator:
Olson, John M.
Object Type:
Report
System:
The UNT Digital Library
Manganese Poisoning - New Insights
The heavy metal intoxications involving the brain may be divided into two groups: One, in which the offending metal is clearly a poison, such as mercury or lead; and a second, in which the offending agent is normally an essential constituent of the body. The latter category would include manganese poisoning, copper poisoning (or Wilson's disease) and, if some recent data are valid, Huntington's chorea, in which iron seems to have been implicated. Our interest in the second category of diseases is due to the fact that these conditions represent special aberrations of normal homeostasis. Homeostasis is the sum of the processes which maintain constant structure, function and constitution in the body and its organs. In manganese poisoning, the homeostatic control is disturbed by virtue of oversupply of this element via an abnormal route (the respiratory tract), while in Wilson's disease homeostasis is disturbed by virtue of genetically transmitted abnormal avidity of the body for dietary copper. In the present paper, we will discuss first some of the clinical features of chronic manganese poisoning in order to raise some questions about extrapyramidal syndrome in general. Thereafter, we will allude to some investigations conducted at this center during the last ten …
Date:
December 24, 1963
Creator:
Cotzias, George. C. & Van Woert, Melvin H.
Object Type:
Report
System:
The UNT Digital Library
A Model for Current Reversal Chronopotentiometry with Kinetic Complications
A model has been developed for the analysis of current reversal chronopotentiograms in systems where the electrode process is followed by a homogeneous second order reaction. The model is analyzed using the IBM 7094 digital computer programed in FORTRAN language. Working curved, derived with the aid of dimensional analysis, can be used to evaluate rate constants from experimental data. The electroreducation of uranium (VI) to uranium (V) with subsequent second order disproportionation of uranium (V) has been studied as an experimental test of the model. Disproportionation rate constants thus obtained are in satisfactory agreement with previously reported values. Other possible applications of the model are discussed.
Date:
December 24, 1963
Creator:
Feldberg, S. W. & Auerbach, Clemens
Object Type:
Report
System:
The UNT Digital Library
Neutron Activation Analysis: Clinical and Biological Studies of Manganese
A strong motivation for metabolic investigations of essential metals lies with the simple fact that these elements are primordial metabolites and building blocks of living matter, a truism largely forgotten today. Among them, the metals of the first transition group display high physical and chemical flexibility: They can concomitantly coordinate natural or artificial ligands; they can regulate electron and proton transport; they can act as catalysts or as cofactors to catalysis.
Date:
December 24, 1963
Creator:
Cotzias, G. C.; Papavasiliou, P. S. & Miller, S. T.
Object Type:
Report
System:
The UNT Digital Library
Past Analogue Multipliers with Field-Effect Transistors
The solution time of analogue multipliers using field-effect transistors is investigated. This time is ultimately limited by the charging time of the field-effect transistor junction. In typical devices suitable for analogue multiplication the charging time is found to be about 10-20 nsec less than one percent. A four quadrant pulse amplitude multiplier circuit is described, whose solution time is equal to the field-effect transistor charging time.
Date:
December 24, 1963
Creator:
Radeka, V.
Object Type:
Report
System:
The UNT Digital Library
Recent Studies on the Experimental Program Requirements for a Super High Energy Accelerator
Brookhaven has sponsored a summer program to study possible experimentation with super-high-energy accelerators of ~ 1000 BeV and to examine the feasibility of colliding beam experiments. A group of about fifty physicists took part in this study program. These investigations are a continuation and supplementary to our previous studies at Brookhaven about two years ago.
Date:
December 24, 1963
Creator:
Yuan, Luke C. L.
Object Type:
Report
System:
The UNT Digital Library
The Use of Low Energy Radioactive Isotopes in The Examination of Paintings on Thin Supports
The importance of the examination of paper and textile supported art objects by means of low energy X-rays has been ably discussed in the preceding papers of this session. The apparatus used for such radiography, however, has tended to be both expensive and confined to laboratory use. A lack of mobility arises from the weight and size of X-ray apparatus and the fact that its installation frequently requires shielding and special electric power lines. An inexpensive radiographic apparatus that required no special installation or external power and is small and light enough to be easily portable should be quite useful.
Date:
December 24, 1963
Creator:
Sayre, E. V.
Object Type:
Report
System:
The UNT Digital Library
Transistorized 10-Mc Decade Scaler
This scaler was designed to replace an obsolescent tube design that was in general use at Lawrence Radiation Laboratory in Livermore. The new design, using solid state devices and printed circuit modules, allows two complete scalers in one frame to occupy the same rack space as the tube design. Switches in the input circuits of the new scaler change input impedance and sensitivity for operation with either tube or transistor circuits. The use of transistors has greatly increased reliability, and has also reduced power by a factor of fifteen. Modular construction of all circuits, including the power supply, minimizes down time since all modules are replaceable without removing the scaler from its rack. Reliability, then cost, were the criteria dictating choice of components and circuits in the scaler design.
Date:
October 24, 1963
Creator:
Van Den Heuvel, C. A.
Object Type:
Report
System:
The UNT Digital Library