Safety rod clutches

Safety rods from their holders by de-energizing the magnets in the magnetic clutches. This is a continuous process the magnet current is decreased, not interrupted.  

The 16 magnet amplifiers (two for each magnet) are all connected in parallel to the sigma bus. If all 16 amplifiers and all eight magnets were identical in adjustment and operation, all safety rods might be expected to drop strictly simultaneously as the sigma bus potential rises past some critical value. What will actually happen, of course, is that one or several 

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After the dump valve is closed, with the toggle switch on the front console at the "Pump On" position, water may be pumped into the reactor vessel by operating the control switch, provided limit switches indicate full insertion of the control rods and the water level is below a "High Level Float Interlock" in the reactor vessel. A high-multiplication trip in the source interlock circuit, which de-energizes the safety rod clutches, insures that kgx in the reactor is below a preset value. 

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