A case study of abnormal conditions and events (ACE) analysis

August of 1993 EPRI initiated a project to perform an evaluation of the application of various methodologies for performing abnormal conditions and events (ACE) analysis on computer systems used in nuclear plants. This paper discusses the application of ACE analysis techniques to two systems designed for the Tennessee Valley Authority (TVA) Browns Ferry nuclear (BFN) plant. Further details can be obtained from EPRI TR-104595, "Abnormal conditions and events analysis for instrumentation and controls systems" which is scheduled for publication in December, 1994.<>