Development and application of a methodology for systems interaction analysis (abstract and summary paper)

There is a need to identify and rank potentially detrimental systems interactions resulting from subtle dependencies among nuclear plant systems. A methodology is being developed for examining such interactions through the analysis of the safety functions during each plant mode using systematic logic techniques. For demonstration purposes, this methodology has been applied to two reactor incidents characterizing systems interaction events - the Browns Ferry 3 partial failure-to-scram of June 28, 1980, and the Crystal River 3 small LOCA of February 26, 1980.