Abstract
Probabilistic fire safety assessment (Fire PSA) of the Finnish nuclear power plant TVO I/II has been extended to include the detailed investigation about the fire risks induced by the unwanted function of the reactor protection system (RPS). This paper describes the main features of RPS as well as the assumptions and the simplifications made during the study. The most important qualitative and quantitative results are told and a number of examples about the fire safety improvements already implemented are given. In the plant with four redundant safety systems and the 2-out-of-4 voting logic in RPS spurious activations of safety related components seem to dominate the risk increasing effect.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
