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AssigneeCombustion Engineering, Inc.
InventorsKenneth V. Margotta, Russell R. Radant, Douglas S. Porter, Mark W. Yorns
Estimating the term…
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.
A nozzle assembly for use with a sealed containment vessel, comprising:
In a nuclear reactor including an in-core instrument, a head which is lifted when the reactor is refuelled, and a nozzle through which the in-core instrument is disposed, a nozzle arrangement comprising:
A method of connecting an instrument assembly to a nozzle opening of a sealed containment vessel, comprising the steps of:
Dependencies are inferred from the claim text.