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Vacuum system problems of EBT: a steady-state fusion experiment

Description: Many of the vacuum problems faced by EBT will soon be shared by other plasma devices as high-power microwave systems and long pulse lengths become more common. The solutions used on EBT (such as the raised lip with elastomer seal) are not unique; however, experience has shown that microwave-compatible designs must be carefully thought out. All details of the vacuum must be carefully thought out. All details of the vacuum must be carefully screened in advance to insure that microwaves do not lea… more
Date: January 1, 1981
Creator: Livesey, R.L.
Partner: UNT Libraries Government Documents Department
open access

Aging assessment of BWR control rod drive systems

Description: This study examines the aging phenomena associated with boiling water reactor (BWR) control rod drive mechanisms (CRDMs) and assess the merits of various methods of managing this aging. Information for this study was acquired from (1) the results of a special CRDM aging questionnaire distributed to each US BWR utility, (2) a first-of-its-kind workshop held to discuss CRDM aging and maintenance concerns, (3) an analysis of Nuclear Plant Reliability Data System (NPRDS) failure cases attributed to… more
Date: January 1, 1991
Creator: Greene, R.H.
Partner: UNT Libraries Government Documents Department
open access

Testing of modified Li/SO/sub 2/ cells

Description: Long-term storage and discharge tests of lithium/sulfur dioxide cells indicated three specific failure modes resulting in premature failure. Further studies resulted in several potential solutions. Small lots of Li/SO/sub 2/ D cells incorporating different combinations of potential fixes were ordered from two manufacturers. These cells were placed on an accelerated test for approximately five months. After removal from the test, each cell was examined microscopically, and the relative merits of… more
Date: January 1, 1980
Creator: Levy, S. C.; Street, H. K. & Crafts, C. C.
Partner: UNT Libraries Government Documents Department
open access

Barium silicate glass/Inconel X-750 interaction. [PWR]

Description: Water reactor safety programs at the Idaho National Engineering Laboratory have required the development of specialized instrumentation. An example is the electrical conductivity-sensitive liquid level transducer developed for use in pressurized-water reactors (PWRs) in which the operation of the sensing probe relies upon the passage of current through the water between the center pin of the electrode and its shell such that when water is present the resulting voltage is low, and conversely, wh… more
Date: January 1, 1980
Creator: Kelsey, P.V. Jr.; Siegel, W.T. & Miley, D.V.
Partner: UNT Libraries Government Documents Department
open access

CRBRP design and test results for fuel handling systems, plugs, and seals

Description: The fuel handling system and reactor rotating plugs for the Clinch River Breeder Reactor Plant (CRBRP) are based primarily on existing technology and, in many respects, follow the concept developed for the Fast Flux Test Facility (FFTF). The equipment and the development programs initiated to verify its performance are described. Test results obtained from the development program, and the extent to which these results verified original design selections, or suggested potential improvements, are… more
Date: January 1, 1977
Creator: Berg, G. E.
Partner: UNT Libraries Government Documents Department
open access

Remote leak detection for the TFTR

Description: The planned design for the TFTR (TOKAMAK Fusion Test Reactor) remote leak detection system consists of a central console which controls the application of tracer gas to possible leak areas. Seals are tested by admitting tracer gas to machined cavities on the atmospheric side of the seal. The tracer gas is brought to the seal cavity by /sup 1///sub 8/-inch diameter tubes which connect to local tracer gas/vacuum manifolds located outside the protective radiation shielding. Vacuum shell walls and … more
Date: January 1, 1977
Creator: Walthers, C.R.
Partner: UNT Libraries Government Documents Department
open access

High-temperature borehole instrumentation

Description: Research in materials, equipment, and instrument development was required in the Hot Dry Rock Energy Extraction Demonstration at Fenton Hill located in northern New Mexico. The new Phase II Energy Extraction System at the Fenton Hill Test Site will consist of two wellbores drilled to a depth of about 4570 m (15,000 ft) and then connected by a series of hydraulic-induced fractures. The first borehole (EE-2) was completed in May of 1980, at a depth of 4633 m (15,200 ft) of which approximately 396… more
Date: January 1, 1982
Creator: Dennis, B.R.; Koczan, S. & Cruz, J.
Partner: UNT Libraries Government Documents Department
open access

Evaluations of glass vitrification techniques on iron ratio determinations

Description: High-level liquid waste at the Savannah River Site (SRS) will be processed into borosilicate glass at the Defense Waste Processing Facility (DWPF). Waste glass will be transported to a geologic repository for permanent disposal. Control of the redox properties of the melter feed is necessary for smooth operation of the melter. The Fe(II)/total Fe ratio in glass is a measure of the redox conditions in the melter. To simulate final glass product conditions, melter feed samples will be vitrified a… more
Date: January 1, 1991
Creator: Spencer, R.B.
Partner: UNT Libraries Government Documents Department
open access

Safeguards instrumentation: past, present, future

Description: Instruments are essential for accounting, for surveillance and for protection of nuclear materials. The development and application of such instrumentation is reviewed, with special attention to international safeguards applications. Active and passive nondestructive assay techniques are some 25 years of age. The important advances have been in learning how to use them effectively for specific applications, accompanied by major advances in radiation detectors, electronics, and, more recently, i… more
Date: January 1, 1982
Creator: Higinbotham, W.A.
Partner: UNT Libraries Government Documents Department
open access

Clay Cap Test Program for the Mixed Waste Management Facility closure at the Savannah River Site

Description: A 58 acre low-level radioactive waste disposal facility at the Savannah River Site, a Department of Energy facility near Aiken, South Carolina, requires closure with a RCRA clay cap. A three-foot thick can requiring 300,000 cubic yards of local Tertiary Kaolin clay with an in-situ permeability of less than or equal to 1 {times} 10{sup -7} centimeters per second is to be constructed. The Clay Cap Test Program was conducted to evaluate the source, lab permeability, in-situ permeability, compactio… more
Date: January 1, 1989
Creator: Newell, J.W. (Main (Charles T.), Inc., Charlotte, NC (USA))
Partner: UNT Libraries Government Documents Department
open access

Status of Rankine-cycle technology for space nuclear power applications

Description: A substantial effort on the development of the liquid metal Rankine cycle space nuclear power system was carried out in programs jointly sponsored by the National Aeronautics and Space Administration (NASA) and the Atomic Energy Commission (AEC) during the period of 1960--1972. Component tests were conducted which have established a considerable technology base for the concept. The development effort and technology status of each component are presented. The key technology issues remaining for … more
Date: January 1, 1991
Creator: Holcomb, R.S.
Partner: UNT Libraries Government Documents Department
open access

Numerical simulation of an equipment hatch for a steel containment vessel to loading beyond the design basis

Description: A preliminary analysis of the sealing deformations of a large equipment hatch with a pressure-seated gasket due to overpressurization was performed. An axisymmetric finite element analysis of the penetration sleeve revealed that its surface can undergo large rotations; values for sealing surface rotation of 7/sup 0/ were computed. Estimates for the order of magnitude of leakage due to the sealing surface rotation were made. 10 refs., 7 figs., 1 tab.
Date: January 1, 1985
Creator: Kulak, R. F.; Hsieh, B. J.; Ash, J. E.; Kennedy, J. M. & McLennan, G. A.
Partner: UNT Libraries Government Documents Department
open access

CRBRP steam-generator design evolution

Description: The overall design of the CRBRP Steam Generator is briefly discussed. Two areas of particular concern are highlighted and considerations leading to the final design are detailed. Differential thermal expansion between the shell and the steam tubes is accommodated by the tubes flexing in the curved section of the shell. Support of the tubes by the internals structure is essential to permit free movement and minimize tube wear. Special spacer plate attachment and tube hole geometry promote unimpe… more
Date: January 1, 1983
Creator: Geiger, W. R.; Gillett, J. E. & Lagally, H. O.
Partner: UNT Libraries Government Documents Department
open access

Design considerations for achieving high vacuum integrity in fusion devices

Description: Achieving high vacuum integrity in fusion devices requires close attention to both the overall system configuration and the design details of joints and seals. This paper describes the factors in selecting the system configuration, from a vacuum standpoint, for the Princeton Plasma Physics Laboratory (PPPL) DCT-8 Tokamak device. The DCT-8 (driven current tokamak) is the eighth design in a series of tokamak concepts defined to cover the magnetic confinement and development gap between the Tokama… more
Date: January 1, 1983
Creator: Fuller, G. M. & Haines, J. R.
Partner: UNT Libraries Government Documents Department
open access

High-temperature ceramic receivers

Description: An advanced ceramic dome cavity receiver is discussed which heats pressurized gas to temperatures above 1800/sup 0/F (1000/sup 0/C) for use in solar Brayton power systems of the dispersed receiver/dish or central receiver type. Optical, heat transfer, structural, and ceramic material design aspects of the receiver are reported and the development and experimental demonstration of a high-temperature seal between the pressurized gas and the high-temperature silicon carbide dome material is descri… more
Date: January 1, 1980
Creator: Jarvinen, P. O.
Partner: UNT Libraries Government Documents Department
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Ceramic dome receiver technology developments

Description: The development and experimental demonstration of a high-temperature seal for the SHARE ceramic dome cavity receiver is reported. The mechanical contact seal which was tested on one-foot-diameter silicon-carbide ceramic-dome hardware at pressure differentials to four atmospheres and dome temperatures to 2200/sup 0/F (1200/sup 0/C) showed negligible leakage at expected receiver operating conditions. Potential solar receiver applications for the technology are illustrated.
Date: January 1, 1980
Creator: Jarvinen, P. O.
Partner: UNT Libraries Government Documents Department
open access

Void-free epoxy castings for cryogenic insulators and seals

Description: The design of the Westinghouse Magnet for the Oak Ridge National Laboratory's Large Coil Program (LCP) incorporates a main lead bushing which transmits heat-leak loads by conduction to the supercritical helium stream. The bushing, which consists of epoxy resin cast about a copper conductor, must be electrically insulated, vacuum tight and be capable of withstanding the stresses encountered in cryognic service. The seal design of the bushing is especially important; leakage from either the heliu… more
Date: January 1, 1983
Creator: Quirk, J.F.
Partner: UNT Libraries Government Documents Department
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Novel instrument for high-pressure research at ultra-high temperatures

Description: A resistively heated diamond-anvil cell has been used to achieve pressures of 110 kbar at temperatures exceeding 1200/sup 0/C for periods long enough to collect x-ray powder diffraction data with energy-dispersive techniques using ''white'' x-radiation produced at the Stanford Synchrotron Radiation Laboratory. 9 refs., 1 fig.
Date: January 1, 1985
Creator: Schiferl, D.; Katz, A. I.; Mills, R. L.; Schmidt, L. C.; Vanderborgh, C.; Skelton, E. F. et al.
Partner: UNT Libraries Government Documents Department
open access

Compact UHV valve with field replaceable windows

Description: There are many applications in synchrotron radiation research where window valves can be usefully employed. Examples include gas cells for monochromator calibration, filters for high order light rejection, and as vacuum isolation elements between machine and experimental vacua. Often these devices are fairly expensive, and have only fixed (ie non-removable) windows. The development of a new type of seal technology by VAT for their series 01 valves provides a gate surface which is free from obst… more
Date: January 1, 1991
Creator: Johnson, E.D. (Brookhaven National Lab., Upton, NY (United States)); Freeman, J. (VAT, Inc., Woburn, MA (United States)) & Powell, F. (Luxel, Inc., Friday Harbor, WA (United States))
Partner: UNT Libraries Government Documents Department
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Metal and elastomer seal tests for accelerator applications

Description: The vacuum system of the Alternating Gradient Synchrotron (AGS) at Brookhaven National Laboratory has more than a thousand metal vacuum seals. Also, numerous elastomer seals are used throughout the AGS to seal large beam component chambers. An accelerator upgrade program is being implemented to reduce the AGS operating pressure by x100 and improve the reliability of the vacuum system. This paper describes work in progress on metal and elastomer vacuum seals to help meet those two objectives. Te… more
Date: January 1, 1989
Creator: Welch, K. M.; McIntyre, G. T.; Tuozzolo, J. E.; Skelton, R.; Pate, D. J. & Gill, S. M.
Partner: UNT Libraries Government Documents Department
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Investigation of corrosion and stress corrosion cracking in bolting materials on light water reactors

Description: Laboratory experiments performed at BNL have shown that the concentration of boric acid to a moist paste at approximately the boiling point of water can produce corrosion rates of the order of several tenths of an inch per year on bolting and piping materials, which values are consistent with service experience. Other failure evaluation experience has shown that primary coolant/lubricant interaction may lead to stress corrosion cracking (SCC) of steam generator manway studs. An investigation wa… more
Date: January 1, 1985
Creator: Czajkowski, C.J.
Partner: UNT Libraries Government Documents Department
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A simple aluminum gasket for use with both stainless steel and aluminum flanges

Description: A technique has been developed for making aluminum wire seal gaskets of various sizes and shapes for use with both stainless steel and aluminum alloy flanges. The gasket material used is 0.9999 pure aluminum, drawn to a diameter of 3 mm. This material can be easily welded and formed into various shapes. A single gasket has been successfully used up to five times without baking. The largest gasket tested to date is 3.5 m long and was used in the shape of a parallelogram. Previous use of aluminum… more
Date: January 1, 1991
Creator: Langley, R. A.
Partner: UNT Libraries Government Documents Department
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Advanced solar receiver development

Description: Ceramic receivers for advanced solar Brayton and advanced solar Stirling thermal power systems are considered which utilize impingement jet cooled silicon carbide ceramic dome heat exchanger modules in conjunction with a cavity receiver geometry to heat a pressurized gaseous heat transfer fluid to temperatures in the range from 1800 to 2400/sup 0/F. Conceptual designs of single and multiple-dome ceramic cavity receivers are presented and analyzed and a combined analytical and experimental progr… more
Date: January 1, 1979
Creator: Jarvinen, P. O.
Partner: UNT Libraries Government Documents Department
open access

EBR-II rotating plug seal maintenance

Description: The EBR-II rotating plug seals require frequent cleaning and maintenance to keep the plugs from sticking during fuel handling. Time consuming cleaning on the cover gas and air sides of the dip ring seal is required to remove oxidation and sodium reaction products that accumulate and stop plug rotation. Despite severely limited access, effective seal cleaning techniques have removed 11 800 lb (5 352 kg) of deposits from the seals since 1964. Temperature control modifications and repairs have als… more
Date: January 1, 1986
Creator: Allen, K.J.
Partner: UNT Libraries Government Documents Department
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