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in subjects: "Electrical Insulation"

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Pacific Northwest Laboratory Report on Fusion Energy Research, April 1977 - June 1977

The development of economic data for fusion power plants continued in a study estimating the potential impact of a shortage of materials important in fusion plant construction. In studies developing heat transfer and fluid flow design tools for fusion reactor blankets, preconceptual design studies were initiated to identify the potential design limits of water cooling in the first wall of Tokamak Next Step (TNS) concepts. In surface effects research clean gold samples were irradiated in the Uni… more

Date: July 1, 1977

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Dielectric strengths of new gases and gas mixtures

It is emphasized that the most effective gaseous dielectrics are gas mixtures with components chosen on the basis of fundamental physicochemical knowledge, especially on low-energy electron-molecule interactions. On the basis of such lnowledge, especially on electron attachment and electron slowing down, a number of new gases and gas mixtures have been found with breakdown strengths superior to pure SF/sub 6/. These include the unitary gases c-C/sub 4/F/sub 8/ (perfluorocyclobutane), C/sub 4/F/… more

Date: January 1, 1978

Creator: James, D.R.; Christophorou, L.G.; Pai, R.Y.; Pace, M.O.; Mathis, R.A.; Sauers, I. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Photovoltaic module electrical termination design requirement study

Motorola Inc., in conjunction with ITT Cannon, has conducted a study to develop information to facilitate the selection of existing, commercial, electrical termination hardware for photovoltaic modules and arrays. This volume of the report contains the executive summary. Module and array design parameters were investigated and recommendations were developed for use in surveying, evaluating, and comparing electrical termination hardware. Electrical termination selection criteria factors were dev… more

Date: July 1, 1980

Creator: Mosna, F.J. Jr. & Donlinger, J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Development of high-mechanical strength electrical insulations for tokamak toroidal field coils

The electrical insulation for the TF (Toroidal Field) coils is subjected to a high interlaminar shear, tensile and compressive stresses. Two candidate epoxy/glass fiber systems using prepreg and vacuum impregnation techniques were evaluated. Specimens were prepared and processed under controlled conditions to simulate specification manufacturing procedures. The strengths of the insulation were measured in interlaminar shear, tension, compression, and combined shear and compression statically. S… more

Date: January 1, 1977

Creator: Burke, C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The electrical insulation of the DIII-D advanced divertor electrode

The electrode for biasing experiments on the DIII-D tokamak was installed in the summer of 1990 and biasing experiments have shown positive results. For the electrode, electrical insulation had to provide voltage standoff in the DIII-D divertor environment of neutral pressures in the range of 10{sup {minus}8} to 5 {times} 10{sup {minus}2} torr, variable magnetic fields, and in the presence of ionizing radiation. The electrical insulation system was designed and tested in air and vacuum for volt… more

Date: October 1, 1991

Creator: Smith, J. P.; Schaffer, M. J. & Hyatt, A. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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DOE Task Force meeting on Electrical Breakdown of Insulating Ceramics in a High Radiation Field

This volume contains the abstracts and presentation material from the Research Assistance Task Force Meeting Electrical Breakdown of Insulating Ceramics in a High-Radiation Field.'' The meeting was jointly sponsored by the Office of Basic Energy Sciences and the Office of Fusion Energy of the US Department of Energy in Vail, Colorado, May 28--June 1, 1991. The 26 participants represented expertise in fusion, radiation damage, electrical breakdown, ceramics, and semiconductor and electronic stru… more

Date: August 1, 1991

Creator: Green, P.H. (comp.)

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Severe accident testing of electrical penetration assemblies

This report describes the results of tests conducted on three different designs of full-size electrical penetration assemblies (EPAs) that are used in the containment buildings of nuclear power plants. The objective of the tests was to evaluate the behavior of the EPAs under simulated severe accident conditions using steam at elevated temperature and pressure. Leakage, temperature, and cable insulation resistance were monitored throughout the tests. Nuclear-qualified EPAs were produced from D. … more

Date: November 1, 1989

Creator: Clauss, D.B. (Sandia National Labs., Albuquerque, NM (USA))

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Development of an improved extruded dielectric cable rated 230 kV

Work performed on developing an improved 230 kV extruded solid dielectric cable, the techniques of jointing such cables and the testing of terminations suitable for operation at that voltage level are described. Difficulties were encountered during manufacture in applying the semi-conducting extruded conductor shield. A new higher melt point compound solved the problem. A joint capable of operating at the 230 kV level was developed but showed a deficiency under voltage impulse testing while the… more

Date: May 1, 1977

Creator: Blais, L D; Traut, R T & Bolden, G N

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Fast ramp superconductor for ohmic heating coils

The present study was conducted to consider practical 10,000 ampere conductor designs to meet the operating constraints for the ohmic heating coils of TNS and experimental Tokamak reactors. The conductor must simultaneously meet the requirements for mechanical support, cryostabilization, high overall winding current density, low mechanical and electrical losses, and mechanical and electrical integrity for cyclic pulsed operation for -7 T to +7 T in one second. A suggested winding is a set of ne… more

Date: January 1, 1977

Creator: Walker, M. S.; Zeitlin, B. A. & Schwall, R. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Improved vacuum surface flashover performance of polymer insulators by the use of unique triple junction designs

Previous research and theories about surface flashover in vacuum indicate that the triple junction region plays a critical role in the insulator flashover process. To attempt to improve upon the performance of the standard 45-degree frustum insulator, three different insulator geometries with modified triple junction regions were investigated. Two samples of each geometry, each 2 cm thick, were tested to obtain the flashover voltage levels in a low 10{sup {minus}5} Torr vacuum using a 1.2-micro… more

Date: January 1, 1991

Creator: Smith, J. D.; Kahaian, D. J.; Honig, E. M.; Montoya, R. E.; Rosocha, L. A.; Allen, G. R. (Los Alamos National Lab., NM (United States)) et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Superheated-steam test of ethylene propylene rubber cables using a simultaneous aging and accident environment

The superheated-steam test exposed different ethylene propylene rubber (EPR) cables and insulation specimens to simultaneous aging and a 21-day simultaneous accident environment. In addition, some insulation specimens were exposed to five different aging conditions prior to the 21-day simultaneous accident simulation. The purpose of this superheated-steam test (a follow-on to the saturated-steam tests (NUREG/CR-3538)) was to: (1) examine electrical degradation of different configurations of EPR… more

Date: June 1, 1986

Creator: Bennett, P. R.; St. Clair, S. D. & Gilmore, T. W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Special purpose materials for the fusion reactor environment: a technical assessment

This technology assessment considers the following areas: (1) breeding materials, (2) coolants, (3) tritium barriers, (4) graphite and silicon carbide, (5) ceramics, (6) heat-sink materials, and (7) magnet materials. Some questions and analyses forming the assessment are described. (MOW)

Date: February 1, 1978

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Evaluation of advanced technologies for power transformers. Final report. Part I, November 1976-March 1979

The high insulating strength of certain gases, such as sulfur hexafluoride, when used at high pressure, suggests that there may be advantages to compressed gases as the insulating fluid in power transformers. However, simply exchanging the oil for compressed gas in an otherwise conventional transformer design will not yield a significant overall advantage. Compressed gases present the engineer with properties which are quite different from mineral oil. If gases are to be used as the major insul… more

Date: June 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Bending behavior of lapped plastic ehv cables

One of the factors delaying the development of lapped polymeric cables has been their reputed poor bending characteristics. Complementary programs were begun at BNL several years ago to mathematically model the bending of synthetic tape cables and to develop novel plastic tapes designed to have moduli more favorable to bending. A series of bend tests was recently completed to evaluate the bending performance of several tapes developed for use in experimental superconducting cables. The program … more

Date: January 1, 1980

Creator: Morgan, G H & Muller, A C

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Design and fabrication of an ion accelerator for TFTR-type neutral beam systems

The design of the prototype 120-keV, 65-A, 0.5-sec ion accelerator for TFTR-type beam systems is described. Details of the manufacture of the constituent parts are given along with descriptions of the major components of the accelerator. Included are the molybdenum grid structures, molybdenum shields, stainless steel hats and the epoxy insulator. Specific manufacturing problems are discussed along with the results of tests to determine the voltage holding capabilities of the assembly.

Date: October 1, 1977

Creator: Paterson, J.A.; Duffy, T.J.; Haughian, J.M.; Biagi, L.A. & Yee, D.P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Radiation effects on insulators for superconducting magnets

In order to determine the radiation stability of electrical insulation that could be used in a superconducting magnet for containment of the plasma in a fusion energy device, 55 specimens of eight types of organic insulation were irradiated to a dose of about 2 x 10/sup 8/ R (2 x 10/sup 6/ J/Kg) at a temperature of 4.8 K in the Low-Temperature Irradiation Facility in the Bulk Shielding Reactor at Oak Ridge National Laboratory. Four of the specimens were monitored for changes in electrical resis… more

Date: January 1, 1978

Creator: Kernohan, R.H.; Coltman, R.R. Jr. & Long, C.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Conductor for a fluid-cooled winding and method for making same

A conductor and method of making the conductor are provided for use in winding electrical coils which are cooled by a fluid communicating with the conductor. The conductor is cold worked through twisting and reshaping steps to form a generally rectangular cross section conductor having a plurality of helical cooling grooves extending axially of the conductor. The conductor configuration makes it suitable for a wide variety of winding applications and permits the use of simple strip insulation b… more

Date: May 12, 1981

Creator: Kenney, W. J.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

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Mechanical characterization of selected adhesives and bulk materials at liquid nitrogen and room temperatures

This paper presents the results of a series of mechanical tests on selected adhesives and bulk materials. The materials tested are of general interest to designers of magnets for cryogenic service and include several epoxies, a varnish, a B-stage glass cloth, insulation papers, and commercially available fiber-reinforced composites. These tests were performed at room temperature (293 K) and at liquid nitrogen temperature (77 K). The tests include both simple tension tests and lap shear tests wi… more

Date: January 1, 1977

Creator: Fitzpatrick, C.M. & Stoddart, W.C.T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Semiannual report for the period April 1-September 30, 1979 of work on: (1) Superconducting power transmission development; (2) Cable insulation development. Power Transmission Project Technical Note No. 99

The objective of the program is to develop an underground superconducting power transmission system which is economical and technically attractive to the utility industry. The system would be capable of carrying very large blocks of electric power, thus enabling it to supplant overhead lines in urban and suburban areas and regions of natural beauty. The program consisted initially of work in the laboratory to develop suitable materials, cryostats, and cable concepts. The materials work covers t… more

Date: January 15, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Development of non-cellulosic insulation for transformers. Quarterly report No. 3, July 1980. General Electric No. CCR-80-16

Work is nearly completed on an analytical model to demonstrate the advantages in both materials and losses to be gained by the utilization of thin insulation in transformers. Strip coating studies are under way. The measurement of the physical properties of film is completed and the measurement of electrical properties is nearing completion. The aging and compatibility studies are continuing.

Date: January 1, 1980

Creator: Fessler, W.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Polymers in solar technologies: an R and D strategy

The use of polymers can increase the cost-effectiveness of solar technologies. The potential impact of polymers may be enhanced earlier if R and D is carried out according to a plan. The purpose of this plan is to present a five-year program consisting of 20 tasks categorized into six major problem areas: response to combined stresses; photochemistry; permeability/adhesion; surface properties; mechanical properties; and development of polymers. A budget required for each task is estimated and s… more

Date: July 1, 1980

Creator: Carroll, W.F. & Schissel, P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Photovoltaic module electrical termination design requirement study. Final report

Motorola Inc., in conjunction with ITT Cannon, has conducted a study to develop information to facilitate the selection of existing, commercial, electrical termination hardware for photovoltaic modules and arrays. Details of the study are presented in this volume. Module and array design parameters were investigated and recommendations were developed for use in surveying, evaluating, and comparing electrical termination hardware. Electrical termination selection criteria factors were developed … more

Date: July 1, 1980

Creator: Mosna, F.J. Jr. & Donlinger, J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Development of non-cellulosic insulation for transformers. Quarterly report No. 2, April 1980. General Electric No. CCR-80-07

Work has continued on the development of an analytical model to demonstrate the advantages in both materials and losses to be gained by the utilization of thin insulation in transformers. Measurement of mechanical and electrical properties of film materials is underway. The aging and material compatibility of synthetic films in transformer oil, silicone, and R113 is being studied in a sealed-tube aging program. Several materials are on test and others are being readied for test.

Date: January 1, 1980

Creator: Fessler, W.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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BPX insulation irradiation program test results

The toroidal field coil insulation for the Burning Plasma Experiment (BPX) is expected to receive a radiation dose of nearly 10{sup 10} rad and to withstand significant mechanical stresses. An irradiation test program was performed at the Idaho National Engineering Laboratory (INEL) using the Advanced Technology Reactor (ATR) for irradiations to doses on the order of 3 {times} 10{sup 10} rad. The flexure and shear strength with compression of commercially procured sheet material were reported e… more

Date: January 1, 1991

Creator: McManamy, T.J. (Oak Ridge National Lab., TN (United States)); Kanemoto, G. (EG and G Idaho, Inc., Idaho Falls, ID (United States)) & Snook, P.G. (Princeton Univ., NJ (United States). Plasma Physics Lab.)

Item Type: Article

Partner: UNT Libraries Government Documents Department