ABSTRACT
Since early nineties of the last century, PSA methods have been used as a complementary approach to common deterministic analyses within the process of ensuring acceptable level of nuclear power plant operation safety in Czech Republic. More recently, PSA concept has become a freestanding decision-making tool for controlling both instantaneous and permanent plant risk level. Since human factor has been playing a fairly significant role in plant risk profile, special HRA methods had to be adopted as a part of worldwide know-how transfer and used to address human related specifics of Czech NPPs operation, in order to keep the corresponding PSA models as realistic as possible.
