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in subjects: "Modifications"

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Hot helium flow test facility summary report

This report summarizes the results of a study conducted to assess the feasibility and cost of modifying an existing circulator test facility (CTF) at General Atomic Company (GA). The CTF originally was built to test the Delmarva Power and Light Co. steam-driven circulator. This circulator, as modified, could provide a source of hot, pressurized helium for high-temperature gas-cooled reactor (HTGR) and gas-cooled fast breeder reactor (GCFR) component testing. To achieve this purpose, a high-temp… more

Date: June 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Establishment of viscometer capability for geopressured fluids. Project 61024 final report, November 19, 1978-December 31, 1979

The feasibility of modifying the IGT capillary viscometer for the measurement of methane-saturated brines at 10,000 psi and 200/sup 0/C was evaluated. The viscometer was cleaned, modified, reassembled and pressure treated. The density cells were calibrated to a precision of approximately 7%. The viscosity of pure value was measured and the best value obtained was 6% below values reported in the literature. The operation of the viscometer was time-consuming and required meticulous cleaning betwe… more

Date: October 1, 1980

Creator: Rockar, E. & Randolph, P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Cadmium sulfide/copper sulfide heterojunction cell research. Final report, February 26, 1979-July 15, 1980

Extensive modifications were made to the multi-source deposition apparatus. These include the installation of a larger vacuum chamber on the existing system. The new chamber provides improved inter-source shielding, an improved substrate mounting and heating system, and a vacuum interlock for introducing substrates. CdS resistivity control by both In doping and off-stoichiometric deposition has been investigated. Indium doping has been achieved both by diffusion from a pre-deposited In layer an… more

Date: June 30, 1980

Creator: Thornton, J. A. & Cornog, D. G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Molecular Sieve Regeneration System for assaying HTO from detritiation systems

A Molecular Sieve Regeneration System (MSRS) is being added to the existing Tritium Waste Treatment system (TWT) within the Tritium Systems Test Assembly (TSTA) at the Los Alamos National Laboratory. This system is an upgrade to the TWT to provide accurate measurements of the liquid waste generated from this system. Within the TWT, hydrogen isotopes are removed from the effluent gas stream by the catalytic conversion to water and the subsequent removal of water by molecular sieve trapping prior… more

Date: January 1, 1992

Creator: Nasise, J.E.; Anderson, J.L. (Los Alamos National Lab., NM (United States)) & Naruse, Y. (Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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MHD Coal-Fired Flow Facility. Quarterly technical progress report, January-March 1980

The University of Tennessee Space Institute (UTSI) reports on significant activity, task status, planned research, testing, development, and conclusions for the Magnetohydrodynamics (MHD) Coal-Fired Flow Facility (CFFF) and the Research and Development Laboratory. Although slowed by incessant rain during several days, work on the CFFF Bid Packages progressed to nearly 100 percent completion, excluding later punchlist items. On the quench system, the cyclone separator was delivered to UTSI, and … more

Date: May 30, 1980

Creator: Altstatt, M. C. & Attig, R.C. Baucum, W.E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Low-Btu coal-gasification-process design report for Combustion Engineering/Gulf States Utilities coal-gasification demonstration plant. [Natural gas or No. 2 fuel oil to natural gas or No. 2 fuel oil or low Btu gas]

This report describes a coal gasification demonstration plant that was designed to retrofit an existing steam boiler. The design uses Combustion Engineering's air blown, atmospheric pressure, entrained flow coal gasification process to produce low-Btu gas and steam for Gulf States Utilities Nelson No. 3 boiler which is rated at a nominal 150 MW of electrical power. Following the retrofit, the boiler, originally designed to fire natural gas or No. 2 oil, will be able to achieve full load po… more

Date: June 1, 1982

Creator: Andrus, H E; Rebula, E; Thibeault, P R & Koucky, R W

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Ion-optical studies for improved ion transmission in multistage isotope-ratio mass spectrometers

Theoretical and experimental ion-optical studies of multistage isotope-ratio mass spectrometers were conducted to determine what improvement in ion transmission efficiency might be attainable through design changes. The computer program GIOS (General Ion Optical Systems) was used to perform theoretical calculations of focusing properties and ion transmission efficiency. Actual transmission through multiple-sector instruments was determined from measurements of the ion beam vertical profile at t… more

Date: October 1, 1991

Creator: Stoffels, J.J. (Pacific Northwest Lab., Richland, WA (United States)) & Laue, H.J. (Purdue Univ., Lafayette, IN (United States))

Item Type: Report

Partner: UNT Libraries Government Documents Department

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New newtron time-of-flight (NTOF) facilities at the Brookhaven 200-MeV Linac

The installation of a new beam chopper and radio-frequency quadrupole (RFQ) preinjector (750 keV) at the Brookhaven National Laboratory (BNL) 200-MeV Linac will enable single micropulse selection (pulse width <1 ns) with periods ranging from 400 ns to 10 ..mu..s. The standard micropulse intensity is 1.2 X 10/sup 9/ p..mu.. pulse with dc-average beam currents of 50 nA-1 ..mu..A routinely available. The NTOF facilities consists of 30-100 meter flight paths at angles of 0, 12, 30, 45, 90, and 135/… more

Date: January 1, 1988

Creator: Ward, T.E.; Alessi, J.; Brennan, J.; Grand, P.; Lankshear, R.; Snead, C.L. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Analysis of plasma coupling with the prototype DIII-D ICRF antenna

Coupling to plasma in the H-mode is essential to the success of future ignited machines such as CIT. To ascertain voltage and current requirements for high-power second harmonic heating (2 MW in a 35- by 50-cm port), coupling to the DIII-D tokamak with a prototype compact loop antenna has been measured. The results show good loading for L-mode and limiter plasmas, but coupling 2 MW to an H-mode plasma demands voltages and currents near the limit of present technology. We report the technologica… more

Date: January 1, 1988

Creator: Ryan, P.M.; Hoffman, D.J.; Bigelow, T.S.; Baity, F.W.; Gardner, W.L.; Mayberry, M.J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Prospects for top at CDF

During the next two years, the Fermilab Tavatron is expected to deliver approximately 100pb{sup {minus}1} of integrated luminosity. We describe improvements to the CDF detector since the 1988--89 collider run and discuss the prospects for the discovery of the top quark during the 1992--93 collider runs.

Date: June 3, 1992

Creator: Gerdes, D. (Chicago Univ., IL (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Upgrade of the Proton West secondary beamline

As originally designed and operated, protons entering PW6 were steered by a series of EPB dipoles into a single interaction length beryllium target, some 43 feet from the enclosure wall. Ensuing secondary beams, either p{sup +}/{pi}{sup +} or p{sup -}/{pi}{sup -}, were collected by a string of quadrupoles following the target, steered westward, away from the Proton Center line, through PW6 and PW7, and ultimately focussed on experiment production targets located within the large PW8 hall. Aroun… more

Date: October 10, 1989

Creator: Spiegel, L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Fermilab Tevatron and Pbar source status report

The antiproton production cycle is enumerated, and the commissioning of the antiproton source is described, giving milestones and major obstacles. The Tevatron collider operation is described, including procedure to load the Tevatron with three bunches of protons and three bunches of antiprotons. Commissioning of the Main Ring and Tevatron for collider operation is described. Development and accelerator studies in four areas were necessary: main ring RF manipulations; controls and applications … more

Date: August 1, 1986

Creator: Edwards, H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Technical evaluation of the proposed design modifications and technical specification changes on grid voltage degradation for the H. B. Robinson Nuclear Generating Plant, Unit 2

This report documents the technical evaluation of the proposed design modifications and technical specification changes on grid voltage degradation for the H. B. Robinson Nuclear Generating Plant Unit 2. The review criteria are based on IEEE Std. 279-1971, IEEE Std. 308-1974, and General Design Criterion 17 of the Code of Federal Regulations, Title 10, Part 50, Appendix A requirements for determining the acceptability of the proposed system to protect the Class 1E equipment from degradation of … more

Date: July 1, 1980

Creator: Selan, J.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Neutron flux enhancement at LASREF

The accelerator at the Los Alamos Meson Physics Facility produces a 1-mA beam of protons at an energy of 800 MeV. Since 1985, the Los Alamos Spallation Radiation Effects Facility (LASREF) has made use of the neutron flux that is generated as the incident protons interact with the nuclei in targets and a copper beam stop. A variety of basic and applied experiments in radiation damage and radiation effects have been completed. Recent studies indicate that the flux at LASREF can be increased by at… more

Date: January 1, 1991

Creator: Sommer, W. F.; Ferguson, P. D. & Wechsler, M. S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Pipelines programming paradigms: Prefab plumbing

Mastery of CMS Pipelines is a process of learning increasingly sophisticated tools and techniques that can be applied to your problem. This paper presents a compilation of techniques that can be used as a reference for solving similar problems

Date: August 1, 1991

Creator: Boeheim, C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Analysis of LOFT steam generator main feed piping loop seal modification

The stress analysis is presented for the proposed loop seal modification to the LOFT Steam Generator Main Feed Piping. THE SAP IV finite element computer program was used to analyze normal, upset, emergency, and faulted conditions. Results of the analysis indicate that the modified main feed piping system will satisfy all structural adequacy criteria specified in Subarticle NC-3650 of the ASME Boiler and Pressure Vessel Code. Results also show that the isolation snubber configuration, specified… more

Date: February 14, 1978

Creator: Nitzel, M.E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Continuous Czochralski growth. Silicon sheet growth development of the large area silicon sheet task of the Low Cost Silicon Solar Array Project. First quarterly progress report, October--December 1977

The development of equipment and processes to produce single crystal solar silicon by a continuous Czochralski method was studied. ''Continuous'' is defined as the ability to produce 100 kilograms of crystal from only one melt container. The equipment to be used is a Hamco CG2000 Production Crystal Grower. Certain modifications will be made to the grower to enable periodic replenishment of silicon into the crucible and removal of grown crystals. The crystal grower was constr… more

Date: December 31, 1977

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Preliminary evaluation of hermetic JT/LJT/R P connector socket contact design

This report presents a precursory examination of a number of issues pertaining to socket contacts in hermetic connectors. The principal issues addressed are high-contact resistance and contact chatter (circuit discontinuities). Efforts examining the characteristics of the existing socket contact design, the possibility of connector/contact rework, quick-fix solutions, and contact redesigns are summarized.

Date: October 1, 1991

Creator: Baca, J. R. F.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Nuclear-data evaluation based on direct and indirect measurements with general correlations

Optimum procedures for the statistical improvement, or updating, of an existing nuclear-data evaluation are reviewed and redeveloped from first principles, consistently employing a minimum-variance viewpoint. A set of equations is derived which provides improved values of the data and their covariances, taking into account information from supplementary measurements and allowing for general correlations among all measurements. The minimum-variance solutions thus obtained, which we call the meth… more

Date: January 1, 1988

Creator: Muir, D.W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Actinide partitioning and transmutation program. Progress report, July 1--September 30, 1977

In Purex process modifications, two cold runs with mixer-settlers were made on the extraction and stripping of ruthenium and zirconium without the presence of uranium. Efforts in actinide recovery from solids were directed toward the determination of dissolution parameters in various reagents for /sup 241/Am and /sup 239/Pu oxide mixtures, /sup 233/U oxide, /sup 237/Np oxide, /sup 244/Cm oxide, /sup 232/Th oxide, and PuO/sub 2/. Studies in americium-curium recovery with OPIX (oxalate precipitat… more

Date: February 1, 1978

Creator: Tedder, D.W. & Blomeke, J.O. (comps.)

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Low enrichment fuel conversion for Iowa State University

Work during the reported period was centered primarily in preparation for receiving the LEU fuel and the shipping of the HEU fuel. This included development of procedures and tools for the disassembly process. During the period we held many practice sessions applying these tools and practices to a dummy fuel assembly. The LEU fuel was received on April 10, 1991 and the reactor was shut down on May 3, 1991 for refueling. The twelve HEU fuel assemblies in the UTR-10 reactor core were removed and … more

Date: August 1, 1991

Creator: Rohach, A.F. & Hendrickson, R.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Bevalac operations update. No. 3

Activities are reported in these areas: Bevatron operations (including a list of major experimental runs), user support at the Bevalac, modifications to the local injector, accelerator improvements at the Super HILAC, and general Bevalac upgrading. Modifications are reported for six individual beam lines. (LEW)

Date: October 1, 1986

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Review of experiments

A study was made to examine the effects which raising the ISA from 200 x 200 GeV to 400 x 400 GeV would have on the ''canonical'' experiments. These were ''canonical'' in the sense that they span the full range of foreseeable physics and have served as topics in previous Summer Studies and Workshops which resulted in quite explicit hardware designs and experimental goals. The study results indicate that all of the ''canonical'' experiments survive. Some are actually improved, some are unaffecte… more

Date: August 18, 1977

Creator: Chang, C.; Yodh, G.; Cutts, D.; Lanou, R.; Engels, E.; Kramer, M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Advancement of flash hydrogasification. Quarterly technical progress report, July-September 1984

The design of test hardware and process development unit (PDU) modifications had been completed previously. Task VII involves the fabrication of test hardware and the modification of an existing 1-ton/h hydroliquefaction PDU at Rockwell's facilities for use as a hydrogasifier test facility. Modifications to the PDU have been completed. The modified facility is designed to accommodate both 10- and 20-ft-long hydrogasifier reactors so that residence times will be in the range of 2 to 6 s when coa… more

Date: September 1, 1985

Creator: Falk, A. Y.

Item Type: Report

Partner: UNT Libraries Government Documents Department