Safety Evaluation by Living Probabilistic Safety Asssessment and Safety Indicators
Activity Acronym:
SIK-1
Authors:
Jan Holmberg, Kari Laakso (edt.), Esko Lehtinen, Gunnar Johanson
Abstract:
A continuous monitoring and follow-up of the risks involved in the operation
of a nuclear power plant is an important part of the operational safety
management. In living probabilistic safety assessment (PSA), the plant
specific PSA is applied in daily safety work to support solving of short-term
problems, and maintaining as well as enhancing safety in the long term. A
quicker and more problem oriented feedback of operating experience can be
achieved by well defined safety indicators, highlighting important trends and
possible recurrence of operational problems at the plant. Living PSA and
safety indicators should be used in combination to effectively support
decision making on safety related issues. The Nordic NKS/SIK-1 project
also showed how a more systematic and clear basis for such decisions can
be formulated by the method of decision analysis.