Search Results

Safety Evaluation of PNPF Modifications

Description: "The purpose of this report is to examine the safety aspects of PNPF restart on continued operation, after completion of the core cleanup and system modifications."
Date: May 1, 1969
Creator: Huntsinger, M. & Hart, R. S.
Partner: UNT Libraries Government Documents Department

Scale "Up or Down" Analysis for Prototype Test

Description: Introduction: In conjunction with the final design and development of a 70 MW sodium intermediate heat exchanger and a sodium steam generator, an analysis is required which can be used as a basis for a determination to scale up or scale down the designs. Included in this analysis are those considerations leading to the recommendation of the best prototype test unit and to some of the limits imposed on scaling up or down when considering future applications of designs other than those actually tested. In addition, these considerations include aspects required to accurately predict the performance, operation, mechanical reliability, and feasibility of fabrication of the 70 MW design.
Date: May 1, 1960
Creator: Alco Products (Firm).
Partner: UNT Libraries Government Documents Department

Shielding Requirements for the Army Package Power Reactor

Description: Abstract. The design, selection, and calculation of the Army Package Power Reactor shielding are described. The APPR-1, a prototype of a package reactor for remote locations, has a primary shield of iron and water. this shield has been adopted to permit fast erection and to provide low transported weight. economically, including transportation cost, the iron water shield is better than a lead water shield and is competitive with a concrete shield for a remote site. Because of the location at Fort Belvoir,Va., the shielding requirements for the APR-1 are considerably more stringent than those for a reactor at a remote base. Since the secondary shielding which surrounds the entire primary system must provide protection for personnel at any location outside the vapor container, concrete is provided for this need.
Date: May 1, 1956
Creator: Meem, J. L. (James Lawrence). & Fairbanks, F. B.
Partner: UNT Libraries Government Documents Department

Development of a high resolution, high sensitivity cylindrical crystal spectrometer for line shape diagnostics of x-rays emitted from hot plasmas

Description: This report outlines progress towards development of a high resolution, high throughput, curved crystal spectrometer suitable for line shape diagnostics of X-rays emitted from hot plasmas. The instrument is designed to interface with the MIT Tokamak (Alcator) with the initial aim of studying the prominent MoL lines which occur in the X-ray spectrum. However, it will have the versatility to function over an energy range of at least 1.5 keV to 7 keV allowing determination of temperature, charge state and density distributions for important impurity ions. The spectrometer employs a large, cylindrically bent crystal which focuses the dispersed X-rays along the cylinder axis where they are recorded by a position sensitive high resistance anode proportional counter. Thus a wide energy range of the spectrum can be recorded simultaneously and sensitively from a short duration plasma. Computer control of data acquisition and analysis will allow real-time diagnostics. The report includes an analysis and optimization of spectrometer parameters for interface with Alcator and an analysis of monolithic and individual silicon diode arrays as alternative position sensitive detectors. A Si(Li) detector with computer-controlled ADC system has been on line at Alcator providing several time sequenced spectra during each shot. Bremsstrahlung and impurity ion spectra are discussed and results for electron temperatures as a function of time and position in the plasma are presented.
Date: May 1, 1977
Creator: Schnopper, H. & Taylor, P. O.
Partner: UNT Libraries Government Documents Department

Burst testing of alloys 800 and 310 at 1,255 K (1,800/sup 0/F) with a simulated coal gasification atmosphere

Description: Several corrosion- and heat-resistant alloys are being considered for long term applications in coal gasification plants at temperatures up to 1.255/sup 0/K in high pressure environments of mixed hydrogen, water, hydrocarbons, and sulfides. A method for in situ testing has been developed for short time mechanical tests of candidate alloys in high pressure, high temperature, gaseous environments, referred to as coal gasification atmosphere (CGA). The method involves bursting thin-walled tubes, using various gases to produce the burst hoop stress. The short time 1.255/sup 0/K burst and creep rupture strength and ductility properties of alloys 800 and 800H in a mixed gas environment, H/sub 2/, CO, CO/sub 2/, CH/sub 4/, SO/sub 2/ (CGA), are not reduced from properties obtained in air. However, the stress- and pressure-accelerated corrosion is more severe in CGA. It is expected that CGA will reduce long term strength and ductility in alloy 800 as a result of the accelerated corrosion. The short time 1.255/sup 0/K strengths of alloy 310 in CGA and pure hydrogen environments are reduced from the values obtained in air by less than 10 percent. The ductilities (total circumferential elongation) are good--approximately 20 percent for all test conditions. The CGA stress- and pressure-accelerated corrosion is greater than in air. Longer time tests in CGA are expected to result in additional strength degradation. Limited creep/fatigue tests of alloy 310 in hydrogen show that hold times are significant. A greater cyclic life is observed using an 8-second hold time than a 55-second hold time.
Date: May 1, 1976
Creator: Dixon, C. E.
Partner: UNT Libraries Government Documents Department

Introduction to SPEAKEASY

Description: SPEAKEASY is a computer language designed for scientists. This document is primarily an introduction to that language, but it also serves as a reference manual for the version currently available for IBM-360 series computers. The specific control cards needed to run jobs at the Argonne installation are described. The report contains two major sections. The first is a detailed description of the basic language. The last section of the report is an illustration of the use of the language in the form of an actual computer run.
Date: May 1, 1971
Creator: Cohen, S. & Vincent, C. M.
Partner: UNT Libraries Government Documents Department

Automated array assembly. Quarterly report No. 4

Description: The production line will be used to fabricate 3-in.-diameter silicon solar cells using the elements of the manufacturing sequences identified previously as most likely to achieve the cost goal of $0.50/W. A plan for introducing and selecting variables was established including three major junction-formation techniques: ion implantation, gaseous (POCl/sub 3/), and spin-on diffusion sources. The testing and development of screen-printed metallization with evaporated Ti/Ag contacts used as a control is included. Organization of the facility was accomplished, including incoming wafer inspection, lot identification, and data logging; in addition, equipment assembly and check-out was completed. Twenty-two wafer lots (25 wafers/lot) were started with some lots devoted to initial calibration of equipment. A plan for modeling and analyzing solar cell performance is presented which is based on measured dark I-V characteristics and a computed value of light-generated current. A statistical approach is outlined for relating measured electrical performance with the manufacturing sequences. Panel design procedures are outlined in some detail starting with the problem of cell selection from an assumed Gaussian distribution of cell parameters. Further considerations of cell size in relation to packing factor and geometric, structural, and land usage factors are given.
Date: May 1, 1977
Creator: D'Aiello, R. V.
Partner: UNT Libraries Government Documents Department

Instantons and massless fermions in two dimensions

Description: The role of instantons in the breakdown of chiral U(N) symmetry is studied in a two dimensional model. Chiral U(1) is always destroyed by the axial vector anomaly. For N = 2 chiral SU(N) is also spontaneously broken yielding massive fermions and three (decoupled) Goldstone bosons. For N greater than or equal to 3 the fermions remain massless. Realistic four dimensional theories are believed to behave in a similar way but the critical N above which the fermions cease to be massive is not known in four dimensions.
Date: May 1, 1977
Creator: Callan, C. G. Jr.; Dashen, R. & Gross, D. J.
Partner: UNT Libraries Government Documents Department

Scalar quantum chromodynamics in two dimensions and parton model. [Scalar quarks, SU(N) groups]

Description: The SU(N) scalar quantum chromodynamics in two space-time dimensions in the large N limit are studied. This is the model of color gauge fields interacting with scalar quarks. It is found that the consensual properties of the four dimensional QCD, i.e., the infrared slavery, quark confinement, the charmonium picture etc. are all realized. Moreover, the current in this model mimics nicely the behaviors of current in the four dimensional QCD, in contrast to the original model of 't Hooft.
Date: May 1, 1977
Creator: Shei, S. S. & Tsao, H. S.
Partner: UNT Libraries Government Documents Department

Development of an assessment methodology for geopressured zones of the upper Gulf Coast based on a study of abnormally pressured gas fields in South Texas. Progress report, 1 March 1976--31 May 1976

Description: During the fourth quarterly reporting period project change-in-scope was approved extending the study area to include Brooks, the remainder of Kenedy and Live Oak Counties. An interim progress report covering that reporting period is presented. Effort during the quarter was directed toward (1) locating drillstem and production test results from geopressured formations, (2) determining formation parameters in an additional large number of producing wells, and (3) searching production records for assessment of geopressured production in Brooks and Kenedy Counties. Several unsuccessful completion tests of geopressured water sands (attempted as gas completions) have been located and these give insight into the problems of completing high-volume water wells in that zone. A successful fracture treatment in a geopressured gas well indicates a producibility increase equivalent to a two-fold improvement in permeability. Permeability calculations for a large number of geopressured and normally pressured gas wells throughout the study area have been completed. In no case has a producing Rio Grande Valley gas well deeper than 10,000 ft. been identified with effective permeability as great as 10 md. Preliminary investigation of Brooks County production has located geopressured production in seven gas fields and in North Kenedy County, an additional three.
Date: May 1, 1976
Creator: Swanson, R. K.; Oetking, P.; Osoba, J. S. & Hagens, R. C.
Partner: UNT Libraries Government Documents Department

Life of Montana Insurance Company solar system: operation and maintenance manual

Description: The solar space heating system for the three-story home office building of the Life of Montana Insurance Company in Bozeman, Montana, is described. The system utilizes 3885 net sq. ft. of Sunworks hydronic collectors and two 3000 gal. heat storage tanks. Engineering drawings of the system are included, and an operation and maintenance manual is included. (WHK)
Date: May 1, 1980
Partner: UNT Libraries Government Documents Department

Analyzing heavy ends of crude: Bartlett oil. [Solfrac process production]

Description: A heavy crude oil produced from the Bartlett field in southeastern Kansas by the Solfrac process developed by ERDA was characterized by procedures developed, in large part, by the ERDA Energy Research Centers in Bartlesville, Okla., and Laramie, Wyo., through the American Petroleum Institute Research Project 60. After removal of the solvent used in the Solfrac process, two distillate fractions accounting for about 50 percent of the solvent-free crude were prepared and analyzed by a combination of techniques including acid and base extractions, adsorption chromatography, gel permeation chromatography (GPC), mass spectrometry (MS), nuclear magnetic resonance (NMR) spectrometry, and gas chromatography. Concentrations of major hydrocarbon and sulfur compound types were well within the ranges observed for five previously studied crude oils, but acid and base fractions were smaller for the Bartlett crude. High-resolution mass spectral data for the Bartlett crude showed the presence of some oxygenate material which were not determined in the previous studies of petroleum crudes. These data plus physical and chemical properties determined by the ERDA/BERC routine crude oil analyses provided an extensive characterization of the portion of Bartlett crude boiling below 540/sup 0/C. These data are valuable for determining appropriate refining processes for efficiently upgrading this crude to more useful products.
Date: May 1, 1977
Creator: Sturm, G. P. Jr.; Woodward, P. W.; Vogh, J. W.; Holmes, S. A. & Dooley, J. E.
Partner: UNT Libraries Government Documents Department

Safeguards implementation practices for a model mixed oxide recycle fuel fabrication facility

Description: Conclusions on the magnitude of the inspection effort and its effectiveness in meeting IAEA objectives are summarized: the minimum goal quantity that can be detected with 95 percent probability is 6 kg Pu. eight to nine resident inspectors are necessary to monitor all operations (3 shifts a day) and to perform verification measurements (23 per day). The facility must also perform inventories monthly if the goal of 6.0 kg is to be attained. Bi-monthly inventory and continual on-site resident inspection can achieve a detection goal quantity of 8.0 kg Pu with 95 percent detection probability. For annual inventories, the detection goal quantity for a 95 percent detection probability is 40 kg Pu. The probability for detecting 8 kg is less than 20 percent. The total inspection effort for a 200 MT/year RFP is estimated to exceed 15 man-years if IAEA headquarters support and analytical laboratory time are added to on-site manpower requirements. Surveillance and containment in the form of seals must be applied to prevent double inventorying and to assure that samples are extracted from the vessel or container being measured. These assurances will probably be achieved by on-line instrumentation installed by the IAEA prior to plant start-up. For assessment, detailed knowledge of plant equipment and floor layout including piping used to transport material is needed. Such information should be requested from the facility prior to preparation of the SIP. Present NDA appears capable of measuring all material in the RFP; however, verification of residual hold-up will require development of new procedures. In-process inventory verification will require special procedures but can be accomplished with present technology. Alternatives to accountability such as perimeter surveillance and containment of declared material within the perimeter should be studied in order to improve detection sensitivity or decrease the effort. (DLC)
Date: May 1, 1976
Creator: Glancy, J. E.
Partner: UNT Libraries Government Documents Department

Reactor primary coolant system pipe rupture study. Progress report No. 35, January--March 1976. [BWR]

Description: The pipe rupture study is designed to extend the understanding of failure-causing mechanisms and to provide improved capability for evaluating reactor piping systems to minimize the probability of failures. Following a detailed review to determine the effort most needed to improve nuclear system piping (Phase I), analytical and experimental efforts (Phase II) were started in 1965. This progress report summarizes the recent accomplishments of a broad program in (a) basic fatigue crack growth rate studies focused on LWR primary piping materials in a simulated BWR primary coolant environment, and (b) studies directed at quantifying weld sensitization in Type-304 stainless steel.
Date: May 1, 1976
Partner: UNT Libraries Government Documents Department

''Glassy'' low temperature thermal properties in crystalline solids

Description: Amorphous dielectrics are known to exhibit anomalous low temperature properties. An extensive review of these properties is presented with an eye toward an understanding of low-lying excitation modes thought to exist in glasses. Work on these systems is described in which a Zr-20 percent Nb samplewhich would be expected to reduce and redistribute the proposed tunneling states. Indeed, the thermal conductivity becomes similar to that of a quenched Zr-8 percent Nb sample and the ''excess'' specific heat linear in temperature dependence is reduced to half the value found in quenched Zr-20 percent Nb. The coefficient of the T/sup 3/ term in the specific heat unexpectedly increased from 23.3 to 56.9 erg/gm K/sup 4/ and this is attributed to a softening of the lattice due to annealing. The specific heat of this sample was remeasured after it had been dunked in liquid nitrogen. The cubic term was then found to be 19.5 erg/g K/sup 4/, smaller than that in quenched Zr-20 percent Nb, an effect which had been expected due to the chemical diffusion during annealing. Further study of this phenomenon is suggested. Among other relevant measurements performed were the specific heat of a sample of amorphous B/sub 2/O/sub 3/ (presented by Stephens (1976)); thermal conductivities of phase-separated unleached Vycor glass and Pyrex; thermal conductivities above 1.2/sup 0/K of polycrystalline MgO, heat-treated Pyroceram and porous Vycor (presented by Tait (1975)) and of mixed crystal KBr-KI (presented by Nathan, Lou and Tait (1976)). The last sample exhibited density fluctuations on a scale of 1000 A but exhibited thermal properties typical of dielectric crystal. Speed of sound measurements were made on both unleached and porous Vycor.
Date: May 1, 1976
Creator: Nathan, B. D.
Partner: UNT Libraries Government Documents Department

Manpower analysis in transportation safety. Final report

Description: The project described provides a manpower review of national, state and local needs for safety skills, and projects future manning levels for transportation safety personnel in both the public and private sectors. Survey information revealed that there are currently approximately 121,000 persons employed directly in transportation safety occupations within the air carrier, highway and traffic safety, motor carrier, pipeline, rail carrier, and marine carrier transportation industry groups. The projected need for 1980 is over 145,000 of which over 80 percent will be in highway safety. An analysis of transportation tasks is included, and shows ten general categories about which the majority of safety activities are focused. A skills analysis shows a generally high level of educational background and several years of experience are required for most transportation safety jobs. An overall review of safety programs in the transportation industry is included, together with chapters on the individual transportation modes.
Date: May 1, 1977
Creator: Bauer, C. S.; Bowden, H. M.; Colford, C. A.; DeFilipps, P. J.; Dennis, J. D.; Ehlert, A. K. et al.
Partner: UNT Libraries Government Documents Department

Superconducting cable system. Summary report, November 1971--August 1975

Description: In the opinion of EPRI and ERDA this 46 month program to develop an ac super-conducting power transmission line was unsuccessful in meeting most of its specific objectives. The technical and economic problems pursued are outlined. Unforeseen difficulties were encountered with power losses in the superconducter, eddy current losses, and heat leak. Fault current testing was never attempted. Major dielectric problems were encountered preventing operation of this system at 138 kV. Ac loss data on small samples of electroplated niobium and a preliminary cost estimate by the contractor indicated that this type of cable system might be attractive for moving large blocks of power if an overall system could be developed that would meet utility system needs. Based on R and D to date, a conceptual design was generated for the rigid conductor, rigid cryogenic enclosure, helium-spacer insulated superconducting cable system. The design parameter values that are included in this report and the cost estimate represent values that the contractor believes could be achieved with continued development; they are based on the results of full-scale laboratory tests or extrapolations from smaller scale laboratory tests. None of these values have been demonstrated to be valid in a full-scale rated power test. The test data on the voltage withstand of the dielectric spacers in pressurized liquid helium were unacceptably low, a factor of 3 to 4 below the anticipated value.
Date: May 1, 1977
Creator: Meyerhoff, R. & Moihara, H.
Partner: UNT Libraries Government Documents Department

Design of a uniaxial load creep testing machine

Description: The design of a uniaxial load creep machine for testing small scale metallic structures such as beams, plates and thin-walled cylinders is described. A special drum device introduced first by Hart is utilized to achieve step loading during creep tests. Some proof test results on four-point bending beams at room temperature are presented. It is noted that the specimen temperature can be controlled within a +-0.2/sup 0/C fluctuation. Measurements of displacements exhibited creeplike behavior in the range of loads and times considered.
Date: May 1, 1977
Creator: Chang, K. J. & Lance, R. H.
Partner: UNT Libraries Government Documents Department

Magnetoelastic stability and vibrations of superconducting magnets. Progress report, September 1, 1975--March 31, 1976

Description: Buckling and vibration problems in small superconducting models of tokamak coils are studied. Observations are reported on thermoelastic buckling of epoxy potted superconducting coils producing significant out of plane deformations due to differences in thermal expansion coefficients. The damping of free vibrations in the coils is also investigated. (MOW)
Date: May 1, 1976
Creator: Moon, F. C.
Partner: UNT Libraries Government Documents Department

Models and error analyses of measuring instruments in accountability systems in safeguards control

Description: Essentially three types of measuring instruments are used in plutonium accountability systems: (1) the bubblers, for measuring the total volume of liquid in the holding tanks, (2) coulometers, titration apparatus and calorimeters, for measuring the concentration of plutonium; and (3) spectrometers, for measuring isotopic composition. These three classes of instruments are modeled and analyzed. Finally, the uncertainty in the estimation of total plutonium in the holding tank is determined.
Date: May 1, 1977
Creator: Dattatreya, E. S.
Partner: UNT Libraries Government Documents Department

Study of flow and loss processes at the ends of a linear theta pinch. Progress report, June 1, 1979-September 30, 1980

Description: Experimental and analytical studies of particle and energy loss at the ends of a linear theta pinch have been carried out. A study of transients occurring in the formation of reversed trapped fields within the coil, and of transients in the end region of a 25 cm long device was completed. A 1-D code has proven to be highly accurate in describing loss events and defining transport mechanisms in different experiments and is described here. A study of loss along field lines in a 50 cm long device has generated new information on loss velocity, axial and radial temperature gradients, and has established an initial effort in understanding thermal loss to the walls. Rotation and parallel trapped fields have been added to the existing 0-D code. A new technique crowbar switch and magnetic field prediction code have been developed. Direct measurment of electron velocity with Thomson scattering was accomplished experimentally. A Nd-glass laser system, frequency doubled, is being developed for low density diagnostics. Theoretical results that accurately predict confinement in FRX devices are described.
Date: May 1, 1980
Creator: York, T. M. & Klevans, E. H.
Partner: UNT Libraries Government Documents Department