Is the approach the Operator has adopted to identify all major accidents suitable and fit for purpose?
The report should explain how major accidents have been identified and demonstrate that no important scenarios have been overlooked. When the method of identifying accidents is not systematic or transparent it will be much more difficult to convince the assessor of its completeness. Simple lists of accidents without evidence to show they are comprehensive may be appropriate in some cases, depending of the scale of the risk to off-site populations, but generally Operators will need to demonstrate that no major accident has been overlooked. Assessors should take into account the scale of the hazards when making a decision on this issue (proportionality).