Device for controlling the dimensions and spaced apart relations

Induced nuclear reactions: processes – systems – and elements – With control of reactor – By electronic signal processing circuitry

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376248, 250227, 356375, G21C 736

Patent

active

044643322

ABSTRACT:
The present invention relates to a device for controlling the dimensions and spaced-apart relationship of rigid pieces disposed in a bundle. Said device comprises: two supple probes adapted to transmit a light beam and insertable between rows of pieces so as to surround one of these rows; means for positioning and displacing these probes; a source of light emitting a light beam transmitted by the first probe then picked up by the second transmitting it to a photodetector producing an electrical signal; electronic means for processing this signal, furnishing information making it possible to control, from reference values, the dimensions and spaced apart relationship of the pieces, due to the modulation of said signal, provoked by the successive occultations of the light beam by the pieces, during the displacement of the probes along the row of pieces. The invention is applicable to the control of the pencils of a fuel assembly of a nuclear reactor.

REFERENCES:
patent: 3922094 (1975-11-01), Colding
patent: 4275296 (1981-06-01), Adolfsson

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