Reactor upper internals inspection device

Details Reactor upper internals inspection device Reactor upper internals inspection device

1992-11-02

1993-12-07

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Testing, sensing, measuring, or detecting a fission reactor...

Vessel monitoring or inspection

376353, G21C 1700

Patent

active

052689409

ABSTRACT:
An inspection device for the upper internals of a nuclear reactor comprising an elongated probe body which is lowered through a central aperture in a support plate that forms part of the upper internals and includes a plurality of vertically extending control rod apertures. Radial channels extend outwardly from the central aperture, each communicating with corresponding control rod apertures. A radially moveable transducer is mounted to the probe body and the latter is rotatable to a position for accessing each channel for radially moving the transducer into the channel. The transducer detects the profile of the channel. An area of particular interest is the area of communication between the channels and the control rod apertures. This area is susceptible to wear due to vibrations of the control rods.

REFERENCES:
patent: 3898741 (1975-08-01), Casey
patent: 3939570 (1976-02-01), Loftus
patent: 4857264 (1989-08-01), Veronesi et al.
patent: 4862079 (1989-08-01), Chickering et al.
patent: 5001841 (1991-03-01), Takigawa et al.
patent: 5078955 (1992-01-01), Hydeman et al.

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