[2L07-08] CCF Evaluation

[2L08] Trial estimation of CCF parameters for 16 safety relief valves by using prior distribution evaluation method in U.S.

*Tomohiko Ikegawa¹, Ryusuke Kimura² (1. Hitachi, 2. HGNE)

Keywords:Common cause failure, Uncertainty estimation, Minimally informative Dirichlet prior, Constrained noninformative prior

Uncertainty of CCF parameters strongly depends on that of its prior distribution. Here, we introduce trial estimation result of CCF parameters for 16 safety relief valves by using a minimally informative Dirichlet prior as a conjugate prior proposed by Idaho National Laboratory (INL).