A Pattern-Matching Model for Operator Cognitive Behaviors During Accident Conditions at a Nuclear Power Plant

This paper proposes an integrated framework of modeling human operator behaviors during accident conditions at a nuclear power plant. The operator model consists of the model for cognitive process and the memory system that supports the cognitive process. As for cognitive process using frame and membership function the state-oriented behavior i.e. pattern-matching is explixitly implemented which is identi®ed as the dominant cognitive process of an operator responding to an accident sequence. A computer code OPEC is formulated to speci®cally incorporate the pattern-matching along with logical reasoning into the integrated framework of modeling human cognitive behaviors. As a case study the code is actually applied to an SGTR accident sequence in order to obtain the simulated behaviors of a responding operator