Method and device for locating a defective tube in a steam gener

Details Method and device for locating a defective tube in a steam gener Method and device for locating a defective tube in a steam gener

1978-11-20

1981-02-10

Yasich, Daniel M.

Measuring and testing

With fluid pressure

Leakage

165 11R, 358106, F28D 706, G01N 2132, G01M 318

Patent

active

042494133

ABSTRACT:
In order to locate a defective tube in a U-tube bundle of a steam generator so arranged that the tube ends are fixed in a tube plate which defines an internal space with the bottom end-wall of the steam generator shell, the entire tube plate is swept by at least one camera placed within the internal space and is visualized on a display screen placed externally of the steam generator. A luminous mark having an identification function is projected independently onto the tube plate at the point corresponding to the extremity of a defective tube and is displayed on the screen during the sweeping operation.

REFERENCES:
patent: 2909975 (1959-10-01), Ulrich
patent: 3902811 (1975-09-01), Altman et al.
patent: 3975943 (1976-08-01), Brachet
patent: 4022270 (1977-05-01), Stockman
patent: 4025201 (1977-05-01), Deane

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