Hydroball string sensing system

Details Hydroball string sensing system Hydroball string sensing system

1989-08-24

1991-11-12

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

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

Flowmeters

376254, 7386105, G21C 1700

Patent

active

050646036

ABSTRACT:
A hydroball string sensing system for a nuclear reactor that includes stainless tubes positioned to guide hydroball strings into and out of the nuclear reactor core. A sensor such as an ultrasonic transducer transmitter and receiver is positioned outside of the nuclear reactor core and adjacent to the tube. The presence of an object such a bullet member positioned at an end a hydroball string, or any one of the hydroballs interrupts the transmission of ultrasound from the transmitter to the receiver. Alternatively, if the bullet member and hydroballs include a ferritic material, either a Hall effect sensor or other magnetic field sensors such as a magnetic field rate of change sensor can be used to detect the location and position of a hydroball string. Placing two sensors along the tube with a known distance between the sensors enables the velocity of a hydroball string to be determined. This determined velocity can be used to control the flow rate of a fluid within the tube so as to control the velocity of the hydroball string.

REFERENCES:
patent: 3845311 (1974-10-01), Fujii
patent: 4051723 (1977-10-01), Head et al.
patent: 4927593 (1990-05-01), Impink, Jr. et al.

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