Nuclear control rod position indicating assembly
The position of a control rod located within a nuclear reactor is sensed by an externally located position indicating assembly. The assembly includes a reed switch voltage divider circuit in which the individual reed switches are actuated in a 2-3-2-3 sequence by the magnetic field of a permanent magnet mounted to the control rod. The assembly averages the signals from the actuated reed switches and after amplifying the averaged signal transmits it to an indicator which provides an indication of control rod position. The voltage divider circuit may have a pair of parallel connected voltage dividers with individual sets of reed switches respectively connected thereto to provide a redundant circuit which will operate with one of the voltage dividers selectively disconnected. 9 claims, 3 figures.
- Assignee:
- Diamond Power Speciality Corp.
- Patent Number(s):
- US 4014741
- OSTI ID:
- 7300252
- Country of Publication:
- United States
- Language:
- English
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