UNT Libraries Government Documents Department - 2,088 Matching Results

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Computer simulation of LMFBR piping systems. [Accident conditions]

Description: Integrity of piping systems is one of the main concerns of the safety issues of Liquid Metal Fast Breeder Reactors (LMFBR). Hypothetical core disruptive accidents (HCDA) and water-sodium interaction are two examples of sources of high pressure pulses that endanger the integrity of the heat transport piping systems of LMFBRs. Although plastic wall deformation attenuates pressure peaks so that only pressures slightly higher than the pipe yield pressure propagate along the system, the interaction … more
Date: January 1, 1977
Creator: A-Moneim, M.T.; Chang, Y.W. & Fistedis, S.H.
open access

Radiation considerations for superconducting fusion magnets

Description: Radiation environment for the magnets is characterized for various conditions expected for tokamak power reactor operation. The radiation levels are translated into radiation effects using available experimental data. The impact of the tradeoffs in radiation shielding and the change in the properties of the superconducting magnets on reactor performance and economics is examined. It is shown that (1) superconducting magnets in fusion reactors will operate at much higher radiation level than was… more
Date: January 1, 1977
Creator: Abdou, M. A.
open access

Comparison of the thermodynamic properties and high temperature chemical behavior of lanthanide and actinide oxides

Description: The thermodynamic properties of the lanthanide and actinide oxides are examined, compared, and associated with a variety of high temperature chemical behavior. Trends are cited resulting from a number of thermodynamic and spectroscopic correlations involving solid phases, species in aqueous solution, and molecules and ions in the vapor phase. Inadequacies in the data and alternative approaches are discussed. The characterization of nonstoichiometric phases stable only at high temperatures is re… more
Date: January 1, 1977
Creator: Ackermann, R. J. & Rauh, E. G.
open access

Thermal conductivity of S. E. New Mexico rocksalt and anhydrite. [Saltcrete]

Description: The thermal conductivity of several rocksalt materials has been determined. Some of the materials were core samples from well AEC 8, Carlsbad, New Mexico. These samples ranged from nearly pure halite (NaCl) to nearly pure anhydrite (CaSO/sub 4/). Core sample crystallite size ranged from about 3 centimeters to essentially packed salt sand (approx. = 0.5mm). The samples exhibited thermal conductivities from approx. = 1.5 to 7.5 W/mK which depended upon purity and grain size. A one meter cube of r… more
Date: January 1, 1977
Creator: Acton, R.U.
open access

Dosimeter sample preparation, quality assurance, and materials development for the ILRR, FRMDC, and FFTF dosimetry programs

Description: Since the IRML dosimeter program began in 1971, approximately 1900 vanadium encapsulated dosimeters and approximately 100 aluminum encapsulated metal fission foils have been prepared to meet TLRR, FRMDC, and FFTF requirements. Development efforts have focused on cost reduction in fabrication as well as characterization of both pure and dilute materials to meet the desired accuracy goals of +-0.5 and +-1.0 percent (2 sigma), respectively. One important requirement of the dosimeter program is tha… more
Date: January 1, 1977
Creator: Adair, H. L.; Kobisk, E. H.; Setaro, J. A.; Quinby, T. C. & Dailey, J. M.
open access

Radiation hardened field oxide

Description: This paper describes the development of a radiation-tolerant field oxide compatible with both MOS and bipolar technologies. Data is presented which illustrates that nonguardbanded devices utilizing conventional field oxide structures cannot be expected to survive an ionizing radiation dose above approximately 5 x 10/sup 4/ rads (Si) due to inversion of p-type silicon surfaces under metallized areas. The radiation hardened oxide was evaluated with both aluminum and polycrystalline silicon gate M… more
Date: January 1, 1977
Creator: Adams, J. R.; Dawes, W. R. & Sanders, T. J.
open access

Considerations in the evaluation of the human element of a safeguards system

Description: By understanding the human system and its function, then a structure for evaluating the human system can be developed. This understanding must be available at the research and development levels, and must occur at the working level so that individuals who impact the system will have a common goal in mind. Then by appropriate coordination and review, a system can be developed which will function as designed with a high degree of assurance.
Date: January 1, 1977
Creator: Adams, K.G. & Trujillo, A.A.
open access

Advanced geothermal primary heat exchanger (APEX). Quarterly progress report Q-5, 1 January 1977-31 March 1977

Description: The current program status relative to the schedule and key mileposts is described. The technical progress meetings held between ALRC and LBL are summarized. A technical discussion is presented covering the experiment design, assembly, and laboratory testing. The work effort planned is described. (MHR)
Date: January 1, 1977
Creator: Addoms, J.F.
open access

Wellsite verification testing of an advanced geothermal primary heat exchanger (APEX)

Description: The well-site test phase is described of a research program conducted by Aerojet Liquid Rocket Company to establish the feasibility of using a recirculating solid bed material to eliminate heat exchanger fouling in geothermal service. The concept was directed towards application as the primary heat exchanger in a geothermal power plant which utilizes a binary cycle. The APEX approach was shown to be effective for condenser operation with fouling cooling water. Similarly, APEX could be applied f… more
Date: January 1, 1977
Creator: Addoms, J.F. & Gracey, C.M.
open access

Wellsite verification testing of an advanced geothermal primary heat exchanger (APEX). Final report 2146: 02-F, 25 September 1976-13 November 1977

Description: The well-site test phase of a research program to establish the feasibility of using a recirculating solid bed material to eliminate heat exchanger fouling in geothermal service is described. The concept was directed towards application as the primary heat exchanger in a geothermal power plant which utilizes a binary cycle. The APEX approach was shown to be effective for condenser operation with fouling cooling water. Similarly, APEX could be applied for geothermal direct heat utilization, for … more
Date: January 1, 1977
Creator: Addoms, J.F. & Gracey, C.M.
open access

Characteristics of the ISABELLE Vacuum System

Description: A discussion is given of the complete vacuum system of ISABELLE, emphasizing those design characteristics dictated by high vacuum, the avoidance of beam current loss, and the reduction of background. The experimental and theoretical justifications for the design are presented.
Date: January 1, 1977
Creator: Aggus, J. R.; Edwards, D., Jr.; Halama, H. J. & Herrera, J. C.
open access

Summary report of neutral detector subgroup

Description: The advantages and disadvantages of calorimeters for use at ISABELLE are discussed including hadron calorimeters, liquid argon calorimeters, uranium scintillator calorimeters, electromagnetic shower detectors, and iron plate calorimeters. A calorimeter is described that is suitable for electromagnetic and hadronic events and is constructed with a front section of narrow Pb strips to start and develop the electromagnetic shower. A section of U towers to contain hadronic showers follows. This cal… more
Date: January 1, 1977
Creator: Akerlof, C.; Bensinger, J. & Donaldson, G.
open access

Magnetoelastic energy calculations for finite element analysis of superconductors

Description: It has been shown that the high current density and magnetic flux density associated with superconductors can make the magnetoelastic energy a significant portion of the total energy in a structural system. The present work presents a procedure for evaluating this magnetoelastic energy for use in the finite element analysis of the structural dynamics and stability of the superconductor. A simple, special case of the element matrices is illustrated.
Date: January 1, 1977
Creator: Akin, J.E. & Stoddart, W.C.T.
open access

Simulated atmospheric disperison of radioactive material released in an urban area

Description: A combination of Gaussian plume and particle-in-cell techniques is used to simulate the atmospheric transport and dispersion of a puff release of radioactive material. The release is caused by an accident that is assumed to occur during the shipment of the radioactive material through central New York City. The simulation provides estimates of volumetric and surface concentrations of the dispersed material that are used to predict radiation doses incurred by the City's population in the event o… more
Date: January 1, 1977
Creator: Akins, R. E.; Church, H. W. & Tierney, M. S.
open access

Relative availability of selected trace elements from coal fly ash and Lake Michigan sediment

Description: The concentration of greater than 1 ..mu..m coal fly ash particles in Lake Michigan surface waters was found to be 10/sup 5/ to 10/sup 6/ per liter. With an expected residence time of one year, this concentration implies a flux to the sediment of 10/sup 6/ to 10/sup 7/ particles/cm/sup 2//yr, or about 10/sup -6/ to 10/sup -5/ g/cm/sup 2//yr. The release of trace elements from fly ash and sediment has been studied using Chelex-100 resin to simulate leaching at high dilutions in natural media. Mn… more
Date: January 1, 1977
Creator: Alberts, J.J.; Burger, J.; Kalhorn, S.; Seils, C. & Tisue, T.
open access

Studies of /sup 12/Be and other off-stability nuclei

Description: In collaboration with the Tandem Van de Graaff staff at the University of Pennsylvania the reaction /sup 10/Be(t,p)/sup 12/Be at E/sub t/ = 12 MeV has been used to study the properties of /sup 12/Be. The first excited state of /sup 12/Be has been found to lie at 2.110 +- 0.015 MeV and to have J = 2 from p,..gamma.. angular correlation measurements. Using a chopped beam the search for delayed neutrons from the decay of /sup 12/Be was negative. However, the decay curve for ..beta.. rays can be fi… more
Date: January 1, 1977
Creator: Alburger, D.E.
open access

Origin and characteristics of low-level nontransuranic waste from the nuclear fuel cycle

Description: Low-level nontransuranic wastes are generated in all nuclear fuel cycle operations. While the activity levels and radiotoxicities of these effluents are generally of a lower magnitude than other fuel cycle wastes, their large volumes and their appearance throughout the fuel cycle make their management a very real concern regardless of the fuel cycle option being considered. Low-level nontransuranic wastes are defined here as wastes that contain less than about 10 nCi of long-lived alpha radiati… more
Date: January 1, 1977
Creator: Alexander, C. W. & Blomeke, J. O.
open access

Transport and transformation of pollutant in the Lake Michigan area. [Pollutants from the Chicago and Milwaukee areas]

Description: The transport and the transformation of pollutants emitted from the Milwaukee and the Chicago areas were studied during August 1976. The study is part of the MAP3S program sponsored by ERDA--DBER. The experiments were conducted in approximately Lagrangian frames of reference utilizing two instrumented aircraft and surface support units. It was found that: 1) build up of ozone downwind of the areas occurred; 2) sulfate concentrations were higher in the urban plume than those upwind, and progress… more
Date: January 1, 1977
Creator: Alkezweeny, A. J.; Young, J. A.; Lee, R. N.; Busness, K. M. & Hales, J. M.
open access

In-core nuclear heating rates easily measured with proven calorimetric instruments

Description: Calorimetric instruments have been developed for directly measuring in-core nuclear heating rates in selected materials. The calorimeters, which are small, easy to fabricate, and easy to operate, permit precise measurement of both low and high in-core nuclear heating rates. Prototype instruments were successfully tested in the Oak Ridge Research Reactor (ORR). Fission rates in /sup 235/U and gamma heating rates in aluminum were measured at eight axial positions in experimental facility E-5 and … more
Date: January 1, 1977
Creator: Allen, E. J.; Kerr, H. T. & Mincey, J. F.
open access

Evaluation of the autoregression time-series model for analysis of a noisy signal

Description: The autoregression (AR) time-series model of a continuous noisy signal was statistically evaluated to determine quantitatively the uncertainties of the model order, the model parameters, and the model's power spectral density (PSD). The result of such a statistical evaluation enables an experimenter to decide whether an AR model can adequately represent a continuous noisy signal and be consistent with the signal's frequency spectrum, and whether it can be used for on-line monitoring. Although e… more
Date: January 1, 1977
Creator: Allen, J. W.
open access

Development and demonstration of compound parabolic concentrators for solar thermal power generation and heating and cooling applications. Progress report, July--December 1975

Description: Work on the development of Compound Parabolic Concentrators (CPC) is described. A tenfold concentrator with a cavity receiver was constructed and tested. The optical efficiency was very good (65 percent), but the thermal performance was degraded by heat losses of the cavity receiver. A 20 ft/sup 2/ (1.86 m/sup 2/) concentrating collector (5.3x) has been tested for thermal and optical performance, and the optical efficiency was excellent (68 percent). In this collector, aluminum extrusions were … more
Date: January 1, 1977
Creator: Allen, J. W.; Levitz, N. M.; Rabl, A.; Reed, K. A.; Schertz, W. W.; Thodos, G. et al.
open access

Electropolishing as a large-scale decontamination technique

Description: Laboratory-scale studies have shown electropolishing to be a rapid and effective technique for removing plutonium and other radionuclide contamination from a variety of metal surfaces. This paper summarizes work in progress at Battelle, Pacific Northwest Laboratory, to develop electropolishing into a large-scale decontamination technique that can be used to minimize the amount of surface-contaminated metallic waste requiring geologic disposal. A 400-gal. electropolishing facility has been estab… more
Date: January 1, 1977
Creator: Allen, R. P.; Arrowsmith, H. W. & Budke, W. C.
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