The 3XX Safety Circuit and Associated Instrumentation

At all reactors but C, there are two complete systems in the 3XX circuit. TWO batteries, two sets of pressure switches, and two latching solenoid mschanisms will allow failure of a single system without the consequence of a ball drop A manual pushbutton is located centrally in each control room to trip both systems, thus dropping the balls. Modifications are presently underway at C Reactor to Install a dual system similar to the other reactors. 

Initruiaentation l)eyond that used for safoty elroult action Is necessary if the reactor is to he operated and controlled effectively and efficiently In eone Instances Process Standards require manual scram-mins of the reactor vhen indicated readings reach predetermined levels  

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