Operator initiative and the procedure panel

Neutron lerel (from safety ion chambers) - 1-SNjr X [Pg.262]

Reactor power (water flow and tenq erature) = l.SNp X [Pg.262]

Monitor tube water flow 80% of normal differential X [Pg.262]

Following down from the traise and scram position of S-5 is seen to lead to the individual withdrawal circle, provided S-.21 is on raise and provided the rod seat interlock (second precaution to ensure that rod is not being raised) is actuating relay R-51. The notation S-21 is used to represent any one of the eight individual shim rod switches, S-21 to S-28. Similar notations apply to the insert interlock MI-1 and the limit switch relay R-21. These conditions on withdrawal simply imply that one is not at the same time trying to run the motors in the opposite direction, and that the rod is not already withdrawn as far as it can go. [Pg.264]

The trip relay, R 16, must be set by switches S 2A and S-2B being in neutral. It will then seal itself in around S 2B, subject to instrument [Pg.265]

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