Control rod position transmitter

Details Control rod position transmitter Control rod position transmitter

1993-08-12

1994-07-26

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

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

Position detection

376228, G21C 1700

Patent

active

053331605

ABSTRACT:
Apparatus for sensing and transmitting a signal indicative of the position of a movable ferromagnetic member relative to a fixed structure within which the member moves. The apparatus includes a plurality of magnetic circuit arrangements arranged uniformly along the outside of the fixed structure. Each magnetic circuit arrangement includes a pair of magnets and a pair of arcuate-shaped magnetic path elements extending circumferentially about the fixed structure. A plurality of magnetic field responsive position transmitters are positioned adjacent the magnetic circuit arrangements for sensing the presence of the movable ferromagnetic member at predetermined positions within the fixed structure. The apparatus is particularly useful for monitoring the position of control rods in a nuclear reactor because the monitoring is done from outside the sealed structure.

REFERENCES:
patent: 3656074 (1972-04-01), Bevilacqua et al.
patent: 3857089 (1974-12-01), Adler et al.
patent: 4508984 (1985-04-01), Guedj et al.
patent: 4711757 (1987-12-01), Feilchenfeld et al.

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