Risk-Informed Approach to Functional Safety Assessment of Instrumentation and Control Systems of Reactor Protection Systems – A Systematic Mapping Study
Abstract
The safety of nuclear power plants (NPPs) is achieved through the implementation of a multi-layered protection system and safety functions, tailored to the configuration of the nuclear facility. One of the critical systems in ensuring safety is the reactor protection system, which ensures the automatic transition of the reactor to a controlled safe state during emergency situations and in the event of deviations from normal operating conditions. An effective assessment of the functional safety of reactor protection systems during the design, implementation, and operation phases serves as a vital tool for confirming compliance with safety requirements and ensuring reliable protection of NPPs.
In contemporary contexts, the evaluation of functional safety effectiveness is conducted based on a risk-oriented approach, which is implemented in accordance with the regulatory requirements set forth by the IAEA and national regulatory bodies.
This article presents a systematic study that investigates the risk-oriented approach to assessing the functional safety of reactor protection systems in NPPs. The research is grounded in a systematic mapping of findings from a sample of 72 articles, selected according to predefined criteria. Consequently, the current state of the field has been defined, and key methodologies, methods, and tools have been identified. Additionally, significant trends have been highlighted, including the integration of modern modeling techniques with traditional approaches. Furthermore, areas for growth and promising directions for future research have been identified, as noted in the reviewed articles.
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