Hazards are everywhere. Unfortunately, a hazard is not always identified until an accident occurs. It is essential to identify the hazards and reduce the risk well in advance of an accident.
For each process in a chemical plant the following questions must be asked:
1. What are the hazards?
2. What can go wrong and how?
3. What are the chances?
4. What are the consequences?
The first question represents hazard identification. The last three questions are associated with risk assessment, considered in detail in chapter 11. Risk assessment includes a determination of the events that can produce an accident, the probability of those events, and the consequences. The consequences could include human injury or loss ...