Definition(s)
IRPA
Individual Risk Per Annum.
Source: NOPSEMA Guidance Note: ALARP, N-04300-GN0166, Australia, Revision 4, December 2012. Regulatory Guidance. Regulatory Guidance
Individual Risk Per Annum (IRPA)
The probability that an individual will become a fatality each year.
Source: International Association of Drilling Contractors, Appendix 2 to Health, Safety and Environment Case Guidelines for Offshore Drilling Contractors, Issue 3.3.2, February 2010. IADC Guidelines