Safety-Related Systems (SRS) Operation and Maintenance at Nuclear Power Plant (NPP)
Hamiti, Enkeljano (2025)
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-202601221641
https://urn.fi/URN:NBN:fi:amk-202601221641
Tiivistelmä
This thesis focuses on the operation and maintenance of Safety Integrity Level (SIL) principles in connection with EYT (Ei Ydinteknisesti Turvallisuusluokiteltu, i.e., not nuclear safety classified) systems at nuclear power plants. While SIL classified components and Safety-Related Systems (SRS) are widely used in other industrial sectors, their application within the nuclear environment is still developing. The aim of this study is to examine how these systems can be safely operated and maintained to support plant reliability, operational safety, and compliance with functional safety standards.
The study applies a qualitative research approach that combines a literature review of international standards with the analysis of existing documentation and findings from earlier development projects. The main reference standards are SFS-EN 61508 (2010, 2011), SFS-EN 61511 (2017), and SFS-EN 61513 (2011), which together provide the framework for hazard analysis, SIL determination, and lifecycle management.
The results of the thesis study include practical guidelines and recommendations for operating and maintaining SIL classified EYT systems, as well as proposals to ensure their long-term integrity and competence management. These findings contribute to the structured and consistent application of functional safety principles within nuclear power plant environments.
The study applies a qualitative research approach that combines a literature review of international standards with the analysis of existing documentation and findings from earlier development projects. The main reference standards are SFS-EN 61508 (2010, 2011), SFS-EN 61511 (2017), and SFS-EN 61513 (2011), which together provide the framework for hazard analysis, SIL determination, and lifecycle management.
The results of the thesis study include practical guidelines and recommendations for operating and maintaining SIL classified EYT systems, as well as proposals to ensure their long-term integrity and competence management. These findings contribute to the structured and consistent application of functional safety principles within nuclear power plant environments.