Common Cause Failure Analysis Calculator for Parameter Estimations

Detailed common cause failure (CCF) analysis is required for an improvement of the PSA quality and for a reasonable quantification of the CCF probability. However, it generally needs the data for CCF events of other nuclear power plants because these CCF events rarely occur. To get the data for the CCF events, KAERI has been participating in the international common cause failure data exchange (ICDE) project. ICDE project is being operated by OECD/NEA and its purpose is to internationally collect and analyze CCF events. As there was no computerized tool for an estimation of the CCF parameters with the ICDE data, KAERI developed a CCF analysis calculator. In this paper, the estimation procedure of the CCF parameters and the developed computer program are presented