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Reduced length design of 9.8 MHz APS/PAR accelerator cavity

Description: The Accelerator cavities in this report can be modeled as a circuit with transmission line sections and lumped elements. Two configuration of the reduced length coaxial cavities are discussed; the folded cavity and the radial line loaded gap cavity are compared with design equations. The APS PAR 9.8 MHz first harmonic cavity is designed in the two configurations and compared. Since capacitive loading in the reduced length cavities involves use of radial transmission line structure, the properties of radial transmission line are discussed. The results of URMELT simulations are presented and compared.
Date: July 8, 1992
Creator: Kang, Y.W.; Kustom, R.L. & Bridges, J.F.
Partner: UNT Libraries Government Documents Department

Preliminary study of insertion device effect on dynamic aperture using RACETRACK

Description: We studied the effects of an insertion device (ID) on the dynamic aperture using the new version of RACETRACK. We found that the nonlinear effect of the ID is the dominant effect on the dynamic aperture reduction compared to the other multipole errors which exist in the otherwise ideal lattice. The previous study of dynamic aperture was based on the assumption that the effect of the fast oscillating terms in L. Smith`s Hamiltonian is small, and hence can be neglected in the simulation. The remarkable agreement between the previous study and the current results using RACETRACK, including all effects of the fast oscillating terms, justified those assumptions at least for the APS ring.
Date: May 8, 1992
Creator: Chae, Yong-chul & Crosbie, E.A.
Partner: UNT Libraries Government Documents Department

Software Development Plan for DESCARTES and CIDER

Description: This Software Development Plan (SDP) outlines all software activities required to obtain functional environmental accumulation and individual dose codes for the Hanford Environmental Dose Reconstruction (HEDR) project. The modeling activities addressed use the output of the air transport-code HATCHET to compute radionuclide concentrations in environmental pathways, and continue on through calculations of dose for individuals. The Hanford Environmental Dose Reconstruction (HEDR) Project has a deliverable in the June 1993 time frame to be able to start computing doses to individuals from nuclear-related activities on the Hanford Site during and following World War II. The CIDER code will compute doses and their uncertainties for individuals living in the contaminated environment computed by DESCARTES. The projected size of the code is 3000 lines.
Date: December 8, 1992
Creator: Eslinger, P.W.
Partner: UNT Libraries Government Documents Department

Molecular biological enhancement of coal biodesulfurization

Description: Progress is reported in understanding Thiobacillus molecular biology, specifically in the area of vector development. At the initiation of this program, the basic elements needed for performing genetic engineering in T. ferrooxidans were either not yet developed. Improved techniques are described which will make it easier to construct and analyze the genetic structure and metabolism of recombinant T. ferrooxidans. The metabolism of the model organic sulfur compound dibenzothiophene (DBT) by certain heterotrophic bacteria was confirmed and characterized. Techniques were developed to analyze the metabolites of DBT, so that individual 4S pathway metabolites could be distinguished. These techniques are expected to be valuable when engineering organic sulfur metabolism in Thiobacillus. Strain isolation techniques were used to develop pure cultures of T. ferrooxidans seven of which were assessed as potential recombinant hosts. The mixotrophic strain T. coprinus was also characterized for potential use as an electroporation host. A family of related Thiobacillus plasmids was discovered in the seven strains of P. ferrooxidans mentioned above. One of these plasmids, pTFI91, was cloned into a pUC-based plasmid vector, allowing it to propagate in E. coli. A key portion of the cloned plasmid was sequenced. This segment, which is conserved in all of the related plasmids characterized, contains the vegetative origin of DNA replication, and fortuitously, a novel insertion sequence, designated IS3091. The sequence of the DNA origin revealed that these Thiobacillus plasmids represent a unique class of replicons not previously described. The potentially useful insertion sequence IS3091 was identified as a new member of a previously undefined family of insertion sequences which include the E. coli element IS30.
Date: October 8, 1992
Creator: Litchfield, J.H.; Zupancic, T.J.; Kittle, J.D. Jr.; Baker, B.; Palmer, D.T.; Traunero, C.G. et al.
Partner: UNT Libraries Government Documents Department

Characterizing the altered zone at Yucca Mountain: The beginning of a testing strategy

Description: The concept of a disturbed zone surrounding the mined openings of a potential geologic repository for high-level radioactive waste was introduced by the US Nuclear Regulatory Commission (NRC) as a region to be excluded for determining groundwater travel time to the accessible environment, but to be included for determining the impact of underground construction and radioactive decay heat on groundwater movement and radionuclide transport for total system performance analysis. This paper explores both the regulatory and technical necessity for characterizing and modeling a larger region -- the altered zone -- within which the temperature is increased significantly by heat from the high-level waste. Particular attention is given to addressing the effects of heterogeneity on groundwater flux and travel time, showing how these effects might be modeled simply on a macroscopic scale, and outlining its parameters. The effect of uncertainty in the parameter values on the performance of a potential repository can then be easily handled by probabilistic analysis.
Date: January 8, 1992
Creator: Chesnut, D.A.
Partner: UNT Libraries Government Documents Department

Bounds on the mixing of the down-type quarks with vector-like singlet quarks

Description: We derive bounds on the mixing of the standard charge -1/3 quarks with vector-like isosinglet quarks, as they exist in some extensions of the standard model. We make no assumptions about the unitarity or any other features of the mixing matrix. We find that the mixing is quite constrained: we are able to set bounds on all the extra parameters which arise in the mixing matrix (CKM matrix), except on two phases. The assumption that there exists only one exotic quark leads to some extra relationships among the parameters of the mixing matrix.
Date: September 8, 1992
Creator: Lavoura, L. & Silva, J. P.
Partner: UNT Libraries Government Documents Department

Variation of conductivity with temperature for the normal state of oxide superconductors

Description: Several equations have been proposed in the literature to describe the variation of resistivity with temperature {rho}(T), for the superconducting oxides. Among these, a linear variation of {rho}(T) has been accepted as a characteristic feature for these materials. These equations have been compared through least squares to experimental values of {rho}(T) for one case of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} with {delta} near 0.1. It has been found that two equations, (a) one based on an averaged density of state and small Fermi and thermal gap energies and (b) another based on Holstein`s small polaron, yield the lowest percent deviations from the experimental values and the smallest chi squared/degree of freedom. They are also the only equations that describe quantitatively the variations with both temperature and composition.
Date: July 8, 1992
Creator: Thorn, R. J.
Partner: UNT Libraries Government Documents Department

Molecular Biological Enhancement of Coal Biodesulfurization. Final Technical Report

Description: Progress is reported in understanding Thiobacillus molecular biology, specifically in the area of vector development. At the initiation of this program, the basic elements needed for performing genetic engineering in T. ferrooxidans were either not yet developed. Improved techniques are described which will make it easier to construct and analyze the genetic structure and metabolism of recombinant T. ferrooxidans. The metabolism of the model organic sulfur compound dibenzothiophene (DBT) by certain heterotrophic bacteria was confirmed and characterized. Techniques were developed to analyze the metabolites of DBT, so that individual 4S pathway metabolites could be distinguished. These techniques are expected to be valuable when engineering organic sulfur metabolism in Thiobacillus. Strain isolation techniques were used to develop pure cultures of T. ferrooxidans seven of which were assessed as potential recombinant hosts. The mixotrophic strain T. coprinus was also characterized for potential use as an electroporation host. A family of related Thiobacillus plasmids was discovered in the seven strains of P. ferrooxidans mentioned above. One of these plasmids, pTFI91, was cloned into a pUC-based plasmid vector, allowing it to propagate in E. coli. A key portion of the cloned plasmid was sequenced. This segment, which is conserved in all of the related plasmids characterized, contains the vegetative origin of DNA replication, and fortuitously, a novel insertion sequence, designated IS3091. The sequence of the DNA origin revealed that these Thiobacillus plasmids represent a unique class of replicons not previously described. The potentially useful insertion sequence IS3091 was identified as a new member of a previously undefined family of insertion sequences which include the E. coli element IS30.
Date: October 8, 1992
Creator: Litchfield, J. H.; Zupancic, T. J.; Kittle, J. D. Jr.; Baker, B.; Palmer, D. T.; Traunero, C. G. et al.
Partner: UNT Libraries Government Documents Department

Verification and validation of TMAP4

Description: The Tritium Migration Analysis Program MODl/CY04 (TMAP4) was written to be used in analyzing experiments and for safety calculations that involve the injection, solution, diffusion, trapping, release, and other related processes experienced by hydrogen isotopes in materials. Because of the desire to make it suitable for analyzing safety issues, it is important that TMAP4 be certified (verified and validated) at Quality Assurance Level A. This report documents the work done to achieve that certification. The process includes assuring that the developed code meets the software requirements specified in the Software Quality Assurance Plan, verifying that the code functions in accordance with the written description and that it is self-consistent and internally correct, and validating that its computed results are in agreement with experimental data and/or known analytical solutions. Quality Level A certification for TMAP4 is specifically for implementation on an IBM PS/2 Model 70 operating under DOS 5.0. Certification for any other environment will require demonstration that all of the verification and validation tests documented here give the same results in the new environment.
Date: July 8, 1992
Creator: Longhurst, G. R.; Harms, S. L.; Marwil, E. S. & Miller, B. G.
Partner: UNT Libraries Government Documents Department

Tip-tilt compensation: Resolution limits for ground-based telescopes using laser guide star adaptive optics. Revision 2

Description: The angular resolution of long-exposure images from ground-based telescopes equipped with laser guide star adaptive optics systems is fundamentally limited by the the accuracy with which the tip-tilt aberrations introduced by the atmosphere can be corrected. Assuming that a natural star is used as the tilt reference, the residual error due to tilt anisoplanatism can significantly degrade the long-exposure resolution even if the tilt reference star is separated from the object being imaged by a small angle. Given the observed distribution of stars in the sky, the need to find a tilt reference star quite close to the object restricts the fraction of the sky over which long-exposure images with diffraction limited resolution can be obtained. In this paper, the authors present a comprehensive performance analysis of tip-tilt compensation systems that use a natural star as a tilt reference, taking into account properties of the atmosphere and of the Galactic stellar populations, and optimizing over the system operating parameters to determine the fundamental limits to the long-exposure resolution. Their results show that for a ten meter telescope on Mauna Kea, if the image of the tilt reference star is uncorrected, about half the sky can be imaged in the V band with long-exposure resolution less than 60 milli-arc-seconds (mas), while if the image of the tilt reference star is fully corrected, about half the sky can be imaged in the V band with long-exposure resolution less than 16 mas. Furthermore, V band images long-exposure resolution of less than 16 mas may be obtained with a ten meter telescope on Mauna Kea for unresolved objects brighter than magnitude 22 that are fully corrected by a laser guide star adaptive optics system. This level of resolution represents about 70% of the diffraction limit of a ten meter telescope in the V band ...
Date: October 8, 1992
Creator: Olivier, S. S.; Max, C. E.; Gavel, D. T. & Brase, J. M.
Partner: UNT Libraries Government Documents Department

Flowsheet Report for Baseline Actinide Blanket Processing for Accelerator Transmutation of Waste

Description: We provide a flowsheet analysis of the chemical processing of actinide and fission product materials form the actinide blanket of an accelerator-based transmutation concept. An initial liquid ion exchange step is employed to recover unburned plutonium and neptunium, so that it can be returned quickly to the transmitter. The remaining materials, consisting of fission products and trivalent actinides (americium, curium), is processed after a cooling period. A reverse Talspeak process is employed to separate these trivalent actinides from lanthanides and other fission products.
Date: April 8, 1992
Creator: Walker, Robert B.
Partner: UNT Libraries Government Documents Department

Corrosion of aluminum cladding under optimized water conditions

Description: Experience at SRS, ORNL, BNL, and Georgia Institute of Technology involving irradiated aluminum clad fuel and target elements, as well as studies of non-irradiated aluminum indicate that some types of aluminum assemblies can be kept in a continually well-deionized water atmosphere for up to 25 years without problems. SRS experience ranges from 2.75 years for the L-1.1 charge kept in deionized D{sub 2}O{sup 1} to greater than 10 years for assemblies stored in the Receiving Basin for Off-site Fuel (RBOF){sup 2}. Experience at Georgia Institute of Technology reactor in Atlanta yielded the longest value of 25 years without problems. The common denominators in all of the reports is that the water is continually deionized to approximately 2 M{Omega} (2 {times} 10{sup 6}ohms) resistivity and the containers for the water are stainless steel or other non-porous material. This resistivity value is equivalent to a value of 0.5 micromhos or microSiemens conductivity and is reagent grade II quality water.{sup 3} 4 tabs, 26 refs.
Date: July 8, 1992
Creator: Gibbs, A.
Partner: UNT Libraries Government Documents Department

Reasons for the removal of Tevatron dipoles from the tunnel: A summary

Description: The commissioning of the Tevatron was completed in 1983 and immediately, thereafter the experimental physics program began. The initial program involved using the Tevatron, first at 400GeV and then at 800GeV to supply beam for fixed target experiments. Beginning in 1985 the collider program has alternated with the fixed target program. The collider program runs with 900GeV protons and anti-protons. In the period since 1983, in addition to providing beam for the High Energy Physics program, we have had to shut down the Tevatron for modifications to the lattice (as dictated by the demands of the physics program) and for repairs to the magnets. These repairs have resulted in an accelerator that operates with high efficiency and reliability.
Date: September 8, 1992
Creator: Gelfand, Norman M.
Partner: UNT Libraries Government Documents Department

Advanced, soluble hydroliquefaction and hydrotreating catalysts. Quarterly report No. 8, April 2, 1991--June 31, 1992

Description: Present hydroliquefaction of coal suffers from required high temperatures and high hydrogen pressures. Surface confined, organometallic catalysists are effective for hydrogenation and HDN of coal model compounds such as quinoline, but not of coal itself. Purpose of this program is to develop soluble analogs of surface confined catalysts that can be impregnated directly into the coal structure at low temperatures. The program consists of 3 major tasks: preparation of candidate HPA (heteropolyanion) precatalysts, HDN and HDO modeling studies, and direct liquefaction studies. During this period, preparation of [PRuMo{sub 11}O{sub 39}]{sup 4{minus}} cluster gave essentially the same size particles and activities as for the mixed metal system. The RuMo bimetallic catalyst was made to work as a HDN catalyst for tetrahydroquinoline.
Date: September 8, 1992
Creator: Laine, R. M. & Stoebe, T.
Partner: UNT Libraries Government Documents Department

Geothermal research and development program. Second annual technical report, July 1, 1991--June 30, 1992

Description: Progress is reported on the following projects: adsorption of water vapor on reservoir rocks, drawdown and buildup pressure analysis in multiwell reservoirs, adsorption parameters from experimental data, tritium tracer movement at the Geysers, adsorption modeling, and effects of earth tides on downhole pressures.
Date: October 8, 1992
Creator: Ramey, H. J. Jr.; Horne, R. N. & Miller, F. G.
Partner: UNT Libraries Government Documents Department

Hydrogen separation by ceramic membranes in coal gasification. Quarterly progress report, April 1, 1992--June 30, 1992

Description: Project objectives are to develop hydrogen-permselective ceramic membranes for water-gas shift membrane-reactor suitable for hydrogen production from coal gas, and to evaluate the technical and economic potential of the membrane-reactor. Work performed during reporting period included membrane deposition and stability testing.
Date: July 8, 1992
Creator: Gavalas, G. R.
Partner: UNT Libraries Government Documents Department

Development of a Coal Quality Expert. Final technical progress report No. 9

Description: This is the ninth Technical Progress Report, describing work performed under DOE Contract No. (DE-FC2290PC896631) ``Development of a Coal Quality Expert.`` The contract is a Cooperative Agreement between the US Department of Energy, CQ Inc., and ABB Combustion Engineering, Inc. This report covers the period from April 1, through June 30, 1992. Four companies and seven host utilities have teamed with CQ Inc. and ABB/CE to perform the work on this project. The work falls under DOE`s Clean Coal Technology Program category of ``Advanced Coal Cleaning.`` The 45-month project will provide the utility industry with a PC expert system to confidently and inexpensively evaluate the potential for coal cleaning blending, and switching options to reduce emissions while producing lowest cost electricity. Specifically, this project will: (1) Enhance the existing Coal Quality Information System (CQIS) database and. Coal Quality Impact Model (CQIM) to allow confident assessment of the effects of cleaning on specific boiler cost and performance. (2) Develop and validate a methodology, Coal Quality Expert (CQE) which allows accurate and detailed predictions of coal quality impacts on total power plant capital cost, operating cost, and performance based upon inputs from inexpensive bench-scale tests.
Date: September 8, 1992
Partner: UNT Libraries Government Documents Department

Advanced, soluble hydroliquefaction and hydrotreating catalysts

Description: Present hydroliquefaction of coal suffers from required high temperatures and high hydrogen pressures. Surface confined, organometallic catalysists are effective for hydrogenation and HDN of coal model compounds such as quinoline, but not of coal itself. Purpose of this program is to develop soluble analogs of surface confined catalysts that can be impregnated directly into the coal structure at low temperatures. The program consists of 3 major tasks: preparation of candidate HPA (heteropolyanion) precatalysts, HDN and HDO modeling studies, and direct liquefaction studies. During this period, preparation of [PRuMo[sub 11]O[sub 39]][sup 4[minus]] cluster gave essentially the same size particles and activities as for the mixed metal system. The RuMo bimetallic catalyst was made to work as a HDN catalyst for tetrahydroquinoline.
Date: September 8, 1992
Creator: Laine, R.M. (Michigan Univ., Ann Arbor, MI (United States). Dept. of Materials Science and Engineering) & Stoebe, T. (Washington Univ., Seattle, WA (United States). Dept. of Materials Science and Engineering)
Partner: UNT Libraries Government Documents Department

Hydrogen separation by ceramic membranes in coal gasification

Description: Project objectives are to develop hydrogen-permselective ceramic membranes for water-gas shift membrane-reactor suitable for hydrogen production from coal gas, and to evaluate the technical and economic potential of the membrane-reactor. Work performed during reporting period included membrane deposition and stability testing.
Date: July 8, 1992
Creator: Gavalas, G.R.
Partner: UNT Libraries Government Documents Department

Software Development Plan for DESCARTES and CIDER. Hanford Environmental Dose Reconstruction Project: Version 1.0

Description: This Software Development Plan (SDP) outlines all software activities required to obtain functional environmental accumulation and individual dose codes for the Hanford Environmental Dose Reconstruction (HEDR) project. The modeling activities addressed use the output of the air transport-code HATCHET to compute radionuclide concentrations in environmental pathways, and continue on through calculations of dose for individuals. The Hanford Environmental Dose Reconstruction (HEDR) Project has a deliverable in the June 1993 time frame to be able to start computing doses to individuals from nuclear-related activities on the Hanford Site during and following World War II. The CIDER code will compute doses and their uncertainties for individuals living in the contaminated environment computed by DESCARTES. The projected size of the code is 3000 lines.
Date: December 8, 1992
Creator: Eslinger, P. W.
Partner: UNT Libraries Government Documents Department

Scoping Meeting Summary , Pahoa, Hawai'i, March 1992, 2 PM Session

Description: The meeting began with presentations by the facilitator, Mr. Spiegel, and the representative from DOE, Dr. Lewis. The facilitator introduced those on the podium. He then described the general structure of the meeting and its purpose: to hear the issues and concerns of those present regarding the proposed Hawaiian Geothermal Project. He described his role as assuring the impartiality and fairness of the meeting. Dr. Lewis of DOE further defined the scope of the project, introduced those of the EIS team present and briefly described the EIS process.
Date: June 8, 1992
Creator: Quinby-Hunt, Mary S.
Partner: UNT Libraries Government Documents Department

Bounds on the mixing of the down-type quarks with vector-like singlet quarks

Description: We derive bounds on the mixing of the standard charge -1/3 quarks with vector-like isosinglet quarks, as they exist in some extensions of the standard model. We make no assumptions about the unitarity or any other features of the mixing matrix. We find that the mixing is quite constrained: we are able to set bounds on all the extra parameters which arise in the mixing matrix (CKM matrix), except on two phases. The assumption that there exists only one exotic quark leads to some extra relationships among the parameters of the mixing matrix.
Date: September 8, 1992
Creator: Lavoura, L. & Silva, J.P.
Partner: UNT Libraries Government Documents Department

Geothermal research and development program

Description: Progress is reported on the following projects: adsorption of water vapor on reservoir rocks, drawdown and buildup pressure analysis in multiwell reservoirs, adsorption parameters from experimental data, tritium tracer movement at the Geysers, adsorption modeling, and effects of earth tides on downhole pressures.
Date: October 8, 1992
Creator: Ramey, H.J. Jr.; Horne, R.N. & Miller, F.G.
Partner: UNT Libraries Government Documents Department

Flowsheet report for baseline actinide blanket processing for accelerator transmutation of waste

Description: We provide a flowsheet analysis of the chemical processing of actinide and fission product materials form the actinide blanket of an accelerator-based transmutation concept. An initial liquid ion exchange step is employed to recover unburned plutonium and neptunium, so that it can be returned quickly to the transmitter. The remaining materials, consisting of fission products and trivalent actinides (americium, curium), is processed after a cooling period. A reverse Talspeak process is employed to separate these trivalent actinides from lanthanides and other fission products.
Date: April 8, 1992
Creator: Walker, R.B.
Partner: UNT Libraries Government Documents Department