TABLE OF CONTENTS Chapter 5 has presented an overview of all the steps involved in performing a QRA. This chapter is devoted to the main analysis techniques that may be used.
Identification of hazards was shown in Chapter 5 to be the first step in a QRA. This is often called Hazard Identification or HAZID. The purpose of hazard identification is to:
Identify all the hazards associated with the planned operations or activities
Create an overview of the risk picture, for planning the further analysis work
Provide an overview of the different types of accidents that may occur, in order to document the range of events, which give rise to risk
Provide assurance, as far as possible, that no significant hazard is overlooked.
It is therefore important that hazard identification provides a good overview, which can be reviewed by a number of people with different experience. The following methods may be used to identify hazards:
| Lists developed by specialists to assist in the review of the planned operations. |
| Lists of hazards from similar studies are often used as a starting point for a new study. |
| Lists and case stories which resemble check lists, but which are based on actual failures and/or accidents. An example is shown overleaf. |
| A technique to identify in detail sequences of failures and conditions that may cause accidents. |
| A technique to review procedures in order to identify sequences of failures and conditions... |
