Читать книгу Risk Assessment - Marvin Rausand - Страница 240

The Norwegian offshore industry has used quantitative RAC since around 1985. The legislation in Norway partly requires that the oil companies themselves should define criteria and the criteria are therefore formulated in different ways and with varying risk levels. Among the criteria that are in use or have been used by different companies are the following:

 Maximum annual probability of being killed for an average person working on the installation.

 Maximum annual probability of being killed for individuals in the group exposed to the highest risk. The groups are defined to distinguish between groups exposed to high risk (e.g. drill crew) and groups with lower risk (e.g. admin staff).

 Maximum annual frequencies for accidents with varying consequence from high to low. This is expressed through an ‐curve (ref Chapter 6).

 Maximum frequency of loss of main safety functions (MSFs). MSFs are key functions that need to be in place to ensure that personnel on the installation can remain safe if a serious accident like a major fire occurs. An example of an MSF may be “A safe area where personnel can stay until they can be evacuated (safe refuge, temporary refuge).” MSFs are explained in more detail in Chapter 6.