INSTRUMENTS DOUBLE CHECKED
The nuclear instrumentation system provides maximum reliability and safety, yet minimizes erroneous readings or signals from the monitoring channels. This is done by using two or more measuring channels in each operating range, and then interlocking the circuits so that at least two of them give the same signal of abnormal operating conditions before initiating a reactor “scram.”
Increased reliability is obtained by using “solid state” instruments or magnetic amplifier units rather than electron tubes and relays.