Definition:
Probability of Loss of Life (PLL) quantifies the annual likelihood of fatalities due to hazardous events.
Key Points:
- Used in quantitative risk assessments.
- Can drive decisions about SIL levels and mitigation measures.
Example:
PLL of 1E-5/year means one expected fatality every 100,000 years of operation.
Cited Source:
- CCPS Guidelines for Chemical Process Quantitative Risk Analysis.