Drive mechanism nuclear reactor control rod

Details Drive mechanism nuclear reactor control rod Drive mechanism nuclear reactor control rod

1977-01-24

1978-11-14

Pendegrass, Verlin R.

176 19EC, 176 36R, G21C 706, G21C 700, G21C 708

Patent

active

041254325

ABSTRACT:
An improved method and apparatus for operating magnetic stepping-type mechanisms. The current flowing in the coils of magnetic stepping-type mechanisms of the kind, for instance, that are used in control-element drive mechanisms is sensed and used to monitor operation of the mechanism. Current waveforms that characterize the motion of the mechanism are used to trigger changes in drive voltage and to verify that the drive mechanism is operating properly. In addition, incipient failures are detected through the observation of differences between the observed waveform and waveforms that characterize proper operation.

REFERENCES:
patent: 3559011 (1971-01-01), Edwards
patent: 3626493 (1971-12-01), Behmke
patent: 3706921 (1972-12-01), Rosen
patent: 3765585 (1973-10-01), Ruoss
patent: 3825160 (1974-07-01), Lichtenberger
patent: 3992255 (1976-11-01), DeWesse
Schultz, "Control of Nuclear Reactors and Power Plants"; 2nd ed. (1961), pp. 232-234.

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