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NKS Programme Area:
NKS-R
Research Area:
Risk analysis
Report Number:
NKS-72
Report Title:
A risk informed safety classification for a Nordic NPP
Activity Acronym:
SOS-2.1
Authors:
Kalle Jänkälä
Abstract:
The report describes a study to develop a safety classification proposal or classification
recommendations based on risks for selected equipment of a nuclear
power plant. The application plant in this work is Loviisa NPP unit 1. The safety
classification proposals are to be considered as an exercise in this pilot study
and do not necessarily represent final proposals in a real situation. Comparisons
to original safety classifications and technical specifications were made. The
study concludes that it is possible to change safety classes or safety significances
as considered in technical specifications and in in-service-inspections
into both directions without endangering the safety or even by improving the
safety.