Naslov
Presentation of Common Cause Failures in Fault Tree Structure of Krško PSA: An Historical Overview

Autori
Vrbanić, Ivan ; Košutić, Ivan ; Vuković, Igor ; Šimić, Zdenko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the International Conference Nuclear Energy for New Europe 2003 / Ravnik, Matjaž ; Žagar, Tomaž - Ljubljana : Nuclear Society of Slovenia, 2003

Skup
International Conference Nuclear Energy for New Europe 2003

Mjesto i datum
Portorož, Slovenija, 08.09.2003. - 11.09.2003

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
common cause failure; fault tree; PSA; Krško

Sažetak
Failure of multiple components due to a common cause represents one of the most important issues in evaluation of system reliability or unavailability. The frequency of such events has relatively low expectancy, when compared to random failures, which affect individual components. However, in many cases the consequence is a direct loss of safety system or mitigative safety function. For this reason, the modeling of a common cause failure (CCF) and its presentation in fault tree structure is of the uttermost importance in probabilistic safety analyses (PSA). During the past decade, PSA model of Krško NPP has undergone many small changes and a couple of major ones in fulfilling its basic purpose, which was serving as a tool for providing an appropriate information on the risk associated with actual plant design and operation. All changes to Krško PSA model were undertaken in order to make it a better tool and / or to make it represent the plant in more accurate manner. The paper provides an overview of changes in CCF modeling in the fault tree structure from the initial PSA model development till present.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA