Electricity: conductors and insulators – Insulators – Through wall or plate
Patent
1976-09-27
1978-08-15
Askin, Laramie E.
Electricity: conductors and insulators
Insulators
Through wall or plate
174 11R, 174 18, 248 56, 285189, G21C 1302, G21C 1304, H01B 1726
Patent
active
041074564
ABSTRACT:
An electrical penetration assembly is disclosed for providing a vapor and pressure seal between a conductor passing through two freestanding walls of a nuclear reactor containment which are subject to relative movement due to a seismic event. Penetration nozzles or tubes are placed through the walls of the containment when it is constructed. The penetration assembly is inserted into the nozzles and comprises a first subassembly fixed and sealed to a first penetration nozzle in the first wall and a second penetration subassembly in sliding or rolling engagement and sealed to a second penetration nozzle in the second wall. The sliding or rolling seal in the second nozzle allows the unrestrained reaction of the conductor to relative movement between the two freestanding walls during a seismic event without damage to the conductor or the penetration assembly. The penetration assembly also prevents the possibility of damage to either the conductor or the penetration assembly due to thermally induced stresses. The penetration assembly also minimizes installation difficulties resulting from unavoidable misalignments of the walls or the penetration nozzles mounted therein. Several embodiments of the invention showing different ways of effecting a sliding or rolling seal in the second penetration nozzle are disclosed.
REFERENCES:
patent: 3761601 (1973-09-01), Kaesser et al.
patent: 3781453 (1973-12-01), Funk et al.
patent: 3801722 (1974-04-01), Korner
patent: 3856983 (1974-12-01), Fisher et al.
patent: 3871689 (1975-03-01), Zaderei et al.
Luria Norman G.
Schuster Robert M.
Askin Laramie E.
General Electric Company
James, Jr. Ivor J.
Laub Sam E.
Turner Samuel E.
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