Apparatus for the monitoring of the passsage of conductive objec

Details Apparatus for the monitoring of the passsage of conductive objec Apparatus for the monitoring of the passsage of conductive objec

1980-11-06

1984-01-03

Cangialosi, Sal

Induced nuclear reactions: processes, systems, and elements

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

376381, 377 10, G21C 1700

Patent

active

044241879

ABSTRACT:
An apparatus for detecting or otherwise monitoring, e.g. counting, each passage of a succession of conductive objects (especially graphite-sheathed ball-shaped nuclear fuel or breeder elements for the core of a nuclear reactor) through a pipe or tube having a conductive wall juxtaposed with the tip of an electrode. A high-voltage direct-current (d-c) generator is connected across the wall and the electrode in series with a high-ohmic resistor. A voltage divider is also connected across this gap and has a low-voltage portion across which a voltage drop of the order of up to 100 volts is detected as the signal which is applied to the monitoring circuit. Thus the electronic detector and counter circuit are connected across the low-voltage resistor of the voltage divider and this resistor is connected to the side of the electrode-pipe system opposite that to which the high-ohmic resistor is connected.

REFERENCES:
patent: 2812491 (1957-11-01), Figlio et al.
patent: 2819447 (1958-01-01), Harmon
patent: 3271672 (1966-09-01), Henderson
patent: 3290589 (1966-12-01), Hubbard
patent: 3315156 (1967-04-01), Keller
patent: 3544891 (1970-12-01), Gerhard
patent: 3657725 (1972-04-01), Estelle et al.
Power Supply Handbook, Kepco Inc., Flushing, N.Y., (3/66), Birman, pp. 44-47.
Source Book of Electronic Circuits, McGraw Hill, Markus, (1968), p. 494.

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