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Modern Application of the Single Failure Criterion in Nuclear Power Plant Design and Its Future Evolution

Abstract of the technical paper/presentation presented at:
DeGruyter magazine (
Development, (e-Doc 4805506)
November 2015

Prepared by:
R. Rulko
Canadian Nuclear Safety Commission


Approaches to the applications of single failure criterion (SFC) principle in nuclear power plant (NPP) design and operation are described and intercompared internationally. The SFC requires that NPP safety systems preserve their safety functions in the presence of any single and resultant failures. Benefits versus disadvantages of different national implementations of the SFC are reviewed. Some improvements are suggested for application of the SFC principle. Focus on the Canadian practice is maintained as the authors are Canadian regulators. The analysis presents the results of authors' research and understanding of the current national and international practice and views for improvements in this area.

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