Experimental approach to evaluate the reliability of digital I&C systems in nuclear power plants

초록

Owing to the unique characteristics of digital instrumentation and control (I&C) systems, the reliability analysis of digital systems has become an important element of probabilistic safety assessments. In this work, an experimental approach to estimate the reliability of digital I&C systems is considered. A digitalized reactor protection system was analyzed in detail, and the system behavior was observed when a fault was injected into the system using a software-implemented fault injection technique. Based on the analysis of the experimental results, it is possible to not only evaluate the system reliability but also identify weak points of fault-tolerant techniques by identifying undetected faults. The results can be reflected in designs to improve the capability of fault-tolerant techniques.

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