Reliability analysis of digital I&C systems at KAERI

KIM Man Cheol

Integrated Safety Assessment Division, Korea Atomic Energy Research Institute, Daejeon, 305-353, Korea (charleskim@kaeri.re.kr)

Abstract: This paper provides an overview of the ongoing research activities on a reliability analysis of digital instrumentation and control (I&C) systems of nuclear power plants (NPPs) performed by the Korea Atomic Energy Research Institute (KAERI). The research activities include the development of a new safety-critical software reliability analysis method by integrating the advantages of existing software reliability analysis methods, a fault coverage estimation method based on fault injection experiments, and a new human reliability analysis method for computer-based main control rooms (MCRs) based on human performance data from the APR-1400 full-scope simulator. The research results are expected to be used to address various issues such as the licensing issues related to digital I&C probabilistic safety assessment (PSA) for advanced digital-based NPPs.
Keyword: probabilistic safety assessment; digital I&C; software reliability; fault coverage; human reliability analysis