Induced nuclear reactions: processes – systems – and elements – Seal arrangements
Patent
1994-06-21
1996-04-30
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
Seal arrangements
376204, 376205, 376206, G21C 1300
Patent
active
055132278
ABSTRACT:
In order to reduce the time and difficulty of disassembling a seal arrangement in a cramped radioactive environment, a nozzle assembly hub is provided with a step bore which receives a seal arrangement, a compression collar, and a retaining nut which presses the seal arrangement into engagement with an inner wall portion of the hub and an outer wall portion of an ICI (in-core instrument) seal plug assembly. The ICI units remain connected to the seal plug assembly during normal disassembly operations. In this manner, the nozzle assembly may be disassembled by merely removing the retaining nut, compression collar, and seal arrangement and lifting the reactor head, along with the nozzle assembly, over the ICI units. The compression collar extends outside the retaining nut such that the collar can be engaged and compressed by an hydraulic loading tool while threading the retaining nut onto the hub.
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Margotta Kenneth V.
Porter Douglas S.
Radant Russell R.
Yorns Mark W.
Chelliah Meena
Combustion Engineering Inc.
Kananen Ronald P.
Mulholland John H.
Walsh Donald P.
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