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Title: Ceramic end seal design for high temperature high voltage nuclear instrumentation cables

Abstract

A coaxial, hermetically sealed end structure is described for electrical instrumentation cables. A generally tubular ceramic body is hermetically sealed within a tubular sheath which is in turn sealed to the cable sheath. One end of the elongated tubular ceramic insulator is sealed to a metal end cap. The other end of the elongated tubular insulator has an end surface which is shaped concave relative to a central conductor which extends out of this end surface. When the end seal is hermetically sealed to an instrumentation cable device and the central conductor is maintained at a high positive potential relative to the tubular metal sheath, the electric field between the central conductor and the outer sheath tends to collect electrons from the concave end surface of the insulator. This minimizes breakdown pulse noise generation when instrumentation potentials are applied to the central conductor.

Inventors:
 [1];  [2]
  1. (Berkeley, CA)
  2. (Kennewick, VA)
Issue Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
OSTI Identifier:
863283
Patent Number(s):
4139724
Assignee:
United States of America as represented by United States (Washington, DC) PNNL
DOE Contract Number:  
E(45-1)-2170
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
ceramic; seal; design; temperature; voltage; nuclear; instrumentation; cables; coaxial; hermetically; sealed; structure; described; electrical; tubular; sheath; cable; elongated; insulator; metal; cap; surface; shaped; concave; relative; central; conductor; extends; device; maintained; positive; potential; electric; field; outer; tends; collect; electrons; minimizes; breakdown; pulse; noise; generation; potentials; applied; tubular ceramic; ceramic insulator; elongated tubular; nuclear instrumentation; central conductor; outer sheath; hermetically sealed; electric field; metal sheath; seal design; tubular insulator; potential relative; positive potential; pulse noise; instrumentation cable; hermetically seal; nuclear instrument; tubular metal; instrumentation cables; breakdown pulse; electrical instrument; /174/

Citation Formats

Meiss, James D., and Cannon, Collins P. Ceramic end seal design for high temperature high voltage nuclear instrumentation cables. United States: N. p., 1979. Web.
Meiss, James D., & Cannon, Collins P. Ceramic end seal design for high temperature high voltage nuclear instrumentation cables. United States.
Meiss, James D., and Cannon, Collins P. Mon . "Ceramic end seal design for high temperature high voltage nuclear instrumentation cables". United States. https://www.osti.gov/servlets/purl/863283.
@article{osti_863283,
title = {Ceramic end seal design for high temperature high voltage nuclear instrumentation cables},
author = {Meiss, James D. and Cannon, Collins P.},
abstractNote = {A coaxial, hermetically sealed end structure is described for electrical instrumentation cables. A generally tubular ceramic body is hermetically sealed within a tubular sheath which is in turn sealed to the cable sheath. One end of the elongated tubular ceramic insulator is sealed to a metal end cap. The other end of the elongated tubular insulator has an end surface which is shaped concave relative to a central conductor which extends out of this end surface. When the end seal is hermetically sealed to an instrumentation cable device and the central conductor is maintained at a high positive potential relative to the tubular metal sheath, the electric field between the central conductor and the outer sheath tends to collect electrons from the concave end surface of the insulator. This minimizes breakdown pulse noise generation when instrumentation potentials are applied to the central conductor.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {1}
}

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