Abstract
The advanced human-machine interface (HMI) in nuclear power plants provides an information environment that supports the operators' burdensome cognitive tasks. Safety function status check (SFSC), one of such tasks, can benefit from well-designed information aid. This paper describes an interface design for supporting the operator's SFSC task as an element of HMI for Advanced Power Reactor 1400 (APR1400) of Korea. A prototype interface scheme for the SFSC task was developed based on the task analysis on APR1400 HMI and an evaluation of existing plants. The interface consists of three hierarchical levels of information: the goal tree including safety functions and their success paths, the flow structure of the success paths, and the system's topological structures related to the success paths. The interface is expected to have advantages in terms of cognitive information processing, which are currently being verified through systematic evaluations under diverse contexts and will be accordingly improved.
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