Characteristic of Operator’s Cognitive Behavior under Continuous and Rapid Change of Operation Task in Nuclear Power Plant

In order to analyze the characteristics of operator’s cognitive behavior under the background of continuous change of operation task, the particularity of peak-shaving task was studied. Combing with literature research, the operator interview and field observation, the cognitive behavior process of the operator under the background of continuous and rapid change of the operation task was studied. The cognitive behavior model under the background of the continuous and rapid change of the operation task was established. The cognitive process of the operator in performing peak-shaving task was identified. The present results lay a foundation for the study of human reliability analysis method under the background of continuous and rapid change of operation task.