Non-Obtrusive Techniques for Monitoring Operator Performance in Nuclear Power Plant Simulators

Abstract

In order to more completely understand and quantify operator actions in nuclear power plant control rooms, many governmental and industry groups are performing experiments at NPP simulator sites. The variables effecting operator performance at these simulator sites include both observable motor actions, and non-observable cognitive functions. We have been successful in developing non-obtrusive graphic techniques which allow a team of trained observers to monitor operator actions while allowing the operators to use the same “tracking tool” during their training. In open-ended interviews following each training session, operators and teachers compared results and discussed differences. Operator “reasons” were assessed against the recorded graphics with resulting information on both motor and cognitive functioning. This paper will present the concepts used for the development of this and other experimental tools. We will also discuss the need to first perform open-ended interviews and the development of interpretive information. Once this qualitative type of information about the human behavior under study is determined, more direct questioning and descriptive interviews are developed.