Device for the detection of a gaseous phase in a nuclear reactor
AssigneeFramatome
InventorsJean Marini, Jean-Claude Weilbacher
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Abstract
A device for detecting the presence of a gaseous phase in the tank of a nuclear reactor closed by a cover on which a plurality of vertical tubes are fixed for adapting the control rod actuating mechanism of the reactor, the adapter tubes not provided with mechanisms being closed by a plug. A plurality of ultrasonic emitter-receivers are fixed to the upper surface of the plugs of at least a part of the adapter tubes, so that each emitter-receiver directs an ultrasonic beam to the inside of the tank parallel to the axis of the corresponding tube, the latter being provided with at least one reflector placed inside the tube in the path of the ultrasonic beam. The invention is especially applicable to reactors cooled by pressurized water.
Claims7
Device for detecting the formation of gaseous bubbles in the tank of a nuclear reactor by means of an ultrasonic emitter-receiver placed at the exterior of said tank, said tank being closed by a cover on which are fixed a plurality of vertical adapter tubes for the control rod actuating mechanisms of said reactor, adapter tubes not provided with mechanisms each being closed by a plug, said device comprising a plurality of ultrasonic emitter receivers fixed to the upper surface of said plugs of at least some of said adapter tubes so that each emitter-receiver directs an ultrasonic beam to the inside of said tank parallel to the axis of the corresponding tube, the latter being provided with at least one reflector placed inside the tube in the path of said ultrasonic beam.
Dependencies are inferred from the claim text.