Societal Risk evaluates the risk to a group of people or a community as a whole. It accounts for population density and recognizes that society is inherently more averse to a single accident that causes many fatalities than to many isolated accidents causing single fatalities.
To arrive at numerical risk values, several analytical techniques are used:
The final step is decision-making. Compare calculated risk against your criteria. If risk is unacceptable, propose safeguards: Societal Risk evaluates the risk to a group
Before calculating anything, define your tolerability limits. The guidelines emphasize establishing:
Identify potential initiating events that could lead to a hazardous release. Compare calculated risk against your criteria
Heat flux from jet fires, pool fires, flash fires, or Fireballs (BLEVEs).
Guidelines for Chemical Process Quantitative Risk Analysis (2nd Edition) is widely considered the industry definitive bible for this methodology. Heat flux from jet fires, pool fires, flash
By combining these two factors, engineers can calculate (the risk to a single person) and Societal Risk (the risk to a group of people).
Guidelines for Chemical Process Quantitative Risk Analysis: The Definitive Framework