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2,624
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1,370
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598
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442
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342
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305
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6,394 Matching Results
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Review of FFTF and CRBRP control rod systems designs
The evolution of the primary control rod system design for FFTF and CRBR, beginning with the initial choice of the basic concepts, is described. The significant component and systems tests are reviewed together with the test results which referenced the development of the CRBR primary control rod system design. Modifications to the concepts and detail designs of the FFTF control rod system were required principally to satisfy the requirements of CRBR, and at the same time incorporating design refinements shown desirable by the tests.
Date:
October 4, 1977
Creator:
Pitterle, T. A. & Lagally, H. O.
Object Type:
Report
System:
The UNT Digital Library
Operator Manual: High Temperature Heat Pump
Experimental data is being obtained from operating a high temperature heat pump system. The use of methanol as a working fluid will necessitate careful monitoring of refrigerant temperatures and pressures with chemical analysis performed on the working fluid during scheduled down time. Materials sent to vendors by Auburn University and quotes received by Auburn concerning equipment (compressor, evaporator, condensor, air heater, dryer, two accumulator tanks, and three expansion valves) are discussed. The simulated dryer and two accumulator tanks were designed by Auburn. The detailed design and pricing estimates are included. Additional information is presented on layout and construction; start-up; testing; shut down; scheduled maintenance and inspection; safety precautions; control system; and trouble shooting.
Date:
March 4, 1980
Creator:
Dyer, D. F.; Maples, G.; Burch, T. E. & Chancellor, P. D.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of regional effects of effluents from uranium production in New Mexico
The Grants Uranium Region is a 2500 mile area of northcentral New Mexico which has produced about 40 percent of all domestic uranium, and holds over one-half of the current reserves. The increasing demand for uranium to fuel commercial nuclear power plants is resulting in rapid growth of the uranium industry and economic, social, and environmental changes are occurring. One of the environmental issues of this region is the concern for eventually unacceptable levels of air and water pollution from effluents from uranium mill tailings piles. This study addresses these potential impacts in relation to industrial environmental control practices, siting features, and other regional/temporal variables, including rates of production, locations and sizes of new mills, and population distributions.
Date:
October 4, 1977
Creator:
Wilson, D.W.
Object Type:
Report
System:
The UNT Digital Library
Vacuum system for the Tandem Mirror Experiment
The Tandem Mirror Experiment (TMX) under construction at LLL is a Q-enhancement experiment using two mirror fields to ''plug'' a central solenoid field. Neutral beam injection supplies the energetic neutrals to the plug regions with attendant quantities of cold gas. The vacuum vessel consists of two large stainless steel tanks, which house the plug coils, joined by an aluminum central cell tank, which fits inside the existing solenoid coils from the 2XIIB experiment. The plug tanks are subdivided into regions for differential pumping of the source gas by liquid-nitrogen- or water-cooled liners. The liners are gettered by Ti--Ta wire sublimators of the 2XIIB type, using 2XIIB power supplies, to supply the necessary high-speed surface pumping. The roughing vacuum system consists of mercury vapor diffusion pumps backed by Roots-type blowers.
Date:
October 4, 1977
Creator:
Atkinson, D.P.; Calderon, M.O. & Nagel, R.J.
Object Type:
Article
System:
The UNT Digital Library
Self-actuating reactor-shutdown system. [LMFBR]
A control system for the automatic or self-actuated shutdown or scram of a nuclear reactor is described. The system is capable of initiating scram insertion by a signal from the plant protection system or by independent action directly sensing reactor conditions of low-flow or over-power. Self-actuation due to a loss of reactor coolant flow results from a decrease of pressure differential between the upper and lower ends of an absorber element. When the force due to this differential falls below the weight of the element, the element will fall by gravitational force to scram the reactor. Self-actuation due to high neutron flux is accomplished via a valve controlled by an electromagnet and a thermionic diode. In a reactor over-power, the diode will be heated to a change of state causing the electromagnet to be shorted thereby actuating the valve which provides the changed flow and pressure conditions required for scramming the absorber element.
Date:
June 4, 1981
Creator:
Barrus, D.M.; Brummond, W.A. & Peterson, L.F.
Object Type:
Patent
System:
The UNT Digital Library
Health and environmental effects document on geothermal energy: 1981
Several of the important health and environmental risks associated with a reference geothermal industry that produces 21,000 MW/sub e/ for 30 y (equivalent to 20 x 10/sup 18/ J) are assessed. The analyses of health effects focus on the risks associated with exposure to hydrogen sulfide, particulate sulfate, benzene, mercury, and radon in air and arsenic in water. Results indicate that emissions of hydrogen sulfide are likely to cause odor-related problems in geothermal resources areas, assuming that no pollution controls are employed. For individuals living within an 80 km radius of the geothermal resources, chronic exposure to particulate sulfate could result in between 0 to 95 premature deaths per 10/sup 18/ J of electricity generated. The mean population risk of leukemia from the inhalation of benzene was calculated to be 3 x 10/sup -2/ cases per 10/sup 18/ J. Exposure to elemental mercury in the atmosphere could produce between 0 and 8.2 cases of tremors per 10/sup 18/ J of electricity. Inhalation of radon and its short-lived daughters poses a mean population risk of 4.2 x 10/sup -1/ lung cancers per 10/sup 18/ J. Analysis of skin cancer risk from the ingestion of surface water contaminated with geothermally derived arsenic …
Date:
December 4, 1981
Creator:
Layton, D. W.; Anspaugh, L. R. & O'Banion, K. D.
Object Type:
Report
System:
The UNT Digital Library
Integrated system for production of neutronics and photonics calculational constants. Volume 10, Revision 1. Neutron-induced interactions: tabulated experimental data
We provide, on microfiche records, tabulated values for data points in the Experimental Cross-Section Information Library (ECSIL). The microfiche records also include corresponding bibliographic information and data indexes. ECSIL now contains 1,600,000 neutron-cross-section data points.
Date:
July 4, 1976
Creator:
MacGregor, M.H.; Cullen, D.E.; Howerton, R.J. & Perkins, S.T.
Object Type:
Report
System:
The UNT Digital Library
Fundamentals of particle beam dynamics and phase space
This report discusses the following topics on synchrotron accelerators: Transverse motion---betatron oscillations; machine lattice; representation of a particle beam; and longitudinal motion---synchrotron oscillations.
Date:
September 4, 1991
Creator:
Weng, W. T. & Mane, S. R.
Object Type:
Report
System:
The UNT Digital Library
NQR-NMR studies of higher alcohol synthesis Cu-Co catalysts
During this period, we focused our attention in analyzing the magnetic nature of the extensively used trimetallic catalyst system Cu-Co-Cr for the production of higher alcohols. We believe that there could be some correspondence between the catalytic and magnetic behaviors of the transition metal catalyst systems. Both the morphology and metallic charge distribution of the particles are known to govern the catalytic as well as the magnetic properties of the system.
Date:
May 4, 1992
Creator:
Murty, A.N.
Object Type:
Report
System:
The UNT Digital Library
Riola release report
Eleven hours after execution of the Riola Event (at 0826 PDT on 25 September 1980) in hole U2eq of the Nevada Test Site (NTS), a release of radioactivity began. When the seepage stopped at about noon the following day, up to some 3200 Ci of activity had been dispersed by light variable winds. On 26 September, examination of the geophone records showed six hours of low-level, but fairly continuous, activity before the release. Electrical measurements indicated that most cables were still intact to a depth below the stemming platform. A survey of the ground zero area showed that the seepage came through cracks between the surface conductor and the pad, through cracks in the pad, and through a crack adjacent to the pad around the mousehole (a small hole adjacent to the emplacement hole). To preclude undue radiation exposure or injury from a surprise subsidence, safety measures were instituted. Tritium seepage was suffucient to postpone site activities until a box and pipeline were emplaced to contain and remove the gas. Radiation release modeling and calculations were generally consistent with observations. Plug-hole interaction calculations showed that the alluvium near the bottom of the plug may have been overstressed and that improvements …
Date:
August 4, 1983
Creator:
Woodward, E.C.
Object Type:
Report
System:
The UNT Digital Library
GAMIDENT: a program to aid in the identification of unknown materials by gamma-ray spectroscopy
A computer code, called GAMIDENT, was written to help identify isotopes by their gamma-ray emissions and thus to assist in the non-destructive assay of unknown materials. The program searches a file (called GAMIN) of gamma-ray spectra, from both radioactive decays and neutron captures, for matches with observed photon energies. This report describes the search procedure used, outlines the use of the code, and gives examples. The code is designed for operation at the Lawrence Livermore Laboratory on a CDC-7600 computer. It is written in standard Fortran (ANSI) as much as possible, but it contains some LRLTRAN instructions required to make use of the Livermore Timesharing System. The code uses about 30,000 words of SCM and about 550,000 words of LCM. Typical problems run in less than 30 seconds. The source program and the data file are available on request.
Date:
January 4, 1980
Creator:
Howerton, R.J. & Eggens, C.J.
Object Type:
Report
System:
The UNT Digital Library
Pressure vessel fracture studies pertaining to a PWR LOCA-ECC thermal shock: experiments TSE-3 and TSE-4 and update of TSE-1 and TSE-2 analysis
The LOCA-ECC Thermal Shock Program was established to investigate the potential for flaw propagation in pressurized-water reactor (PWR) vessels during injection of emergency core coolant following a loss-of-coolant accident. Studies thus far have included fracture mechanics analyses of typical PWRs, the design and construction of a thermal shock test facility, determination of material properties for test specimens, and four thermal shock experiments with 0.53-m-OD (21-in.) by 0.15-m-wall (6-in.) cylindrical test specimens. In the first experiment, initiation was not expected and did not occur, although there was a small amount of subcritical crack growth. In the second experiment, initiation of a semicircular flaw took place as expected; the final length along the surface was about four times the initial length, but there was no radial growth. The third and fourth experiments were similar, and the long axial flaw initiated in good agreement with predictions.
Date:
November 4, 1977
Creator:
Cheverton, R.D. & Bolt, S.E.
Object Type:
Report
System:
The UNT Digital Library
NQR-NMR studies of higher alcohol synthesis Cu-Co catalysts
The primary concern of the study during this period has been to examine the origin and basis of the several nonconforming NMR lines reported in our earlier study. Previous studies by earlier investigators indicate that (a) the product distribution in the conversion of synthesis gas to liquid fuels is dependant on the copper/cobalt ratio and (b) that the catalytic results reported by different groups of investigators using the IFP prescription (4) are widely divergent. These observations prompted us to make a critical examination of the effect of metal ratio and the method of preparation on the magnetic character of catalysts.
Date:
April 4, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Measured air overpressures, soil-particle pressures, and slumps during the pre-ASIAGO U2Ar stemming experiment
On November 15, 1976, Lawrence Livermore Laboratory completed its first comprehensive stemming experiment for measuring downhole parameters while varying fill material and rate. Stemming can be defined as backfilling a hole in which a device has been placed to prevent leakage of radioactive materials or gases to the surface. A computer code is being developed for stemming operations, and this experiment was designed to measure parameters under different stemming conditions so the code could be verified and modified. The experiment was conducted in the lower half of a steel-cased, 4-ft-diam, 2000-ft-deep hole at Nevada Test Site. The two stemming materials used in the experiment, Overton sand and LLL II mix, were tested at three fill rates. Significant results of this experiment included successful measurement of downhole air overpressures, vertical and horizontal soil-particle pressures, and temperature. Vertical soil-particle pressures were higher than expected. All surface measurements were valid. The slump-displacement measurements system provided a timing mark to indicate the occurrence of a slump. A major slump occurred on the third day of stemming; a minor slump occurred on the fourth day.
Date:
January 4, 1978
Creator:
Freynik, H.S. Jr.; Roach, D.R. & Dittbenner, G.R.
Object Type:
Report
System:
The UNT Digital Library
Data testing results for the ENDF/B-V Evaluated Neutron Data File. [20 spheres pulsed with 14-Mev neutrons]
The ENDF/B-V Evaluated Neutron Data File has been tested for validity by comparing calculated and experimental values of k/sub eff/ for 66 critical assemblies and emission neutron spectra for 20 spheres that were pulsed with 14-MeV neutrons. 20 figures, 7 tables.
Date:
July 4, 1980
Creator:
Howerton, Robert J.
Object Type:
Report
System:
The UNT Digital Library
Automated laser fusion target production concept
A target production concept is described for the production of multilayered cryogenic spherical inertial confinement fusion targets. The facility is to deliver targets to the reactor chamber at rates up to 10 per second and at costs consistent with economic production of power.
Date:
October 4, 1977
Creator:
Hendricks, C.D.
Object Type:
Article
System:
The UNT Digital Library
Intelligent optical design program
Described is a general approach to the development of computer programs capable of designing image-forming optical systems without human intervention and of improving their performance with repeated attempts. The approach utilizes two ideas: (1) interpretation of technical design as a mapping in the configuration space of technical characteristics and (2) development of an intelligent routine that recognizes global optima. Examples of lens systems designed and used in the development of the general approach are presented, current status of the project is summarized, and plans for the future efforts are indicated.
Date:
May 4, 1984
Creator:
Bohachevsky, I.O.; Viswanathan, V.K. & Woodfin, G.
Object Type:
Article
System:
The UNT Digital Library
Transportation Spending and "Buy America" Requirements
This report discusses the Buy America Act, the popular name for a group of domestic content restrictions that have been attached to funds administered by the Department of Transportation (DOT).
Date:
February 4, 2014
Creator:
Dolan, Alissa M.
Object Type:
Report
System:
The UNT Digital Library
The European Parliament
This report provides background on the Congress-European Parliament (EP) relationship and the role of the Transatlantic Legislators' Dialogue (TLD). It also explores potential future options that coukd strengthen ties between the two bodies.
Date:
February 4, 2014
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library
The Social Security Number: Legal Developments Affecting Its Collection, Disclosure, and Confidentiality
This report provides a comprehensive list of federal developments affecting use of the social security number, from 1935 to the present. This list includes federal statutes regulating the collection and disclosure of SSNs, as well as specific authorizations for the use of SSNs, confidentiality provisions, and criminal provisions relating to SSN misuse.
Date:
February 4, 2014
Creator:
Swendiman, Kathleen S. & Lanza, Emily M.
Object Type:
Report
System:
The UNT Digital Library
Terrorism Risk Insurance: Issue Analysis and Overview of Current Program
This report looks at the background and current Congressional status of the Terrorism Risk Insurance Act of 2002.
Date:
March 4, 2014
Creator:
Webel, Baird
Object Type:
Report
System:
The UNT Digital Library
The United Nations Human Rights Council: Issues for Congress
This report provides historical background of the United Nations Human Rights Council, including the role of the previous Commission. It discusses the Council's current mandate and structure, as well as U.S. policy and congressional actions. Finally, it highlights possible policy issues for the 112th Congress, including the overall effectiveness of the Council in addressing human rights, implications for U.S. membership, and U.S. financial contributions to the Council.
Date:
February 4, 2014
Creator:
Blanchfield, Luisa
Object Type:
Report
System:
The UNT Digital Library
Transatlantic Trade and Investment Partnership (TTIP) Negotiations
This report provides: (1) context for the Transatlantic Trade and Investment Partnership (TTIP) negotiations; (2) analysis of possible trade and investment issues in the negotiations; and (3) discussion of issues for Congress. The U.S.-EU negotiations on TTIP are not public, however, the information and analysis in this report on issues in the negotiations are based on publicly-available information.
Date:
February 4, 2014
Creator:
Akhtar, Shayerah Ilias & Jones, Vivian C.
Object Type:
Report
System:
The UNT Digital Library
Salaries of Members of Congress: Congressional Votes, 1990-2013
The report contains information on the pay procedure of members of Congress and recent adjustments. It provides information on previous actions and votes by year, from 1990-2010.
Date:
November 4, 2013
Creator:
Brudnick, Ida A.
Object Type:
Report
System:
The UNT Digital Library