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

Patent · Tue Feb 13 04:00:00 EST 1979

OSTI ID:6073918

Meiss, J D; Cannon, C P

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.

• Assignee: Dept. of Energy
• Patent Number(s): US 4139724
• OSTI ID: 6073918
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
CABLES
CERAMICS
COAXIAL CABLES
CONDUCTOR DEVICES
DESIGN
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
EQUIPMENT
REACTOR INSTRUMENTATION
SEALS