ALARP demonstration is required when the calculated Individual Risk Per Annum (IRPA) for various worker group lies within tolerable region as per risk acceptability criteria.
ALARP process starts by identification of the Major Risk Contributors to given worker group or at a location. These major risk contributors are further drilled down to determine the top contributors to risk. Risk Reduction Measures (RRM) are identified against these contributors to reduce the risk.
While identifying these RRMs hierarchy of controls are maintained. Once these major risk contributors are identified and RRMs are highlighted, an ALARP workshop is conducted to discuss and brainstorm these RRMs or any additional RRMs, using Cost Benefit Analysis (CBA) approach.
The assessment takes into account:
- Risk to people;
- The intrinsic value of potentially exposed asset;
- Continued plant operations (potential production loss); and
- Environmental damages and clean-up cost.