Stepwise Increase in Temperature Setpoint

The setpoint of the main steam temperature increases stepwise from 500 to 504°C The results are shown in Figs. 4.27 and 4.28. The feedwater flow rate is decreased so as to increase the main steam temperature. Although the power decreases by the coolant density feedback, it is only about 2%, and then, the power returns to the 

28 Response to stepwise change in temperature setpoint from 500 to 504 C with control system (2) 

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