Operation in face of difficulty

4 peratiom in Face of Bifficnlty. There is no clear line to be drawn between normal operation and operation under difficulty. The purpose here is to comment on a few of the situations in which the opierator will feel more than his average need for attention to instrument signals and control actions. The examples chosen for discussion are change-over of servos, loss or interruption of power, automatic shutdown action, and accumulation of poison after uninCeutional loss of level. 

Wh en the reactor is scrammed, the chances of getting back into normal operation are dependent upon the time history of previous operation as well as upon the obvious need of remedying the causative trouble. This is because of 

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In order to review and integrate the detailed information of preceding sections, an attempt will be made here to recount briefly the operating procedure in a few typical situations. These will include start up, shutdown of both the normal and scram varieties, manipulation of level near N, and operation in face of difficulty. 

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