ABSTRACT
A common challenge for all CCF models is the lack of suitable data to support the model parameters. The nuclear industry has given CCFs considerable attention and carried out several CCF data collection projects to build generic data bases on CCFs (NEA, 2004, NEA, 2014, SKI, 1998). The process industry and the petroleum industry have not run similar projects, not as part of large data collection projects, like e.g. OREDA (OREDA, 2009) nor through other known initiatives. Hauge et al. (2006) investigated how the industry control CCF, but the study was of a qualitative nature. The PDS data handbook (SINTEF, 2013a) is one of few data sources that propose values of beta for commonly used components, but these are mainly established on the basis of expert judgments, comparison with other data sources and some results from operational reviews. The value of having generic data bases for CCFs may also be questioned. As discussed by Rausand (2012), the contribution from CCFs is strongly influenced by local, plant-specific conditions. This is also supported by results from operational failure reviews as discussed later in this paper.
