Page 156 - Pipeline Risk Management Manual Ideas, Techniques, and Resources

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Leak Impact Factor

Contents iquid Spill Dispersion 7/15]
Physical extent of spill 71151
hemal effects 711 52
I Changes in LIF Calculations 71135 ontamination Potential 711 53
TI. Background 71135 Spill Migration 71153
Ill Product Hazard 71136 Spill and Leak Mitigation 711 54
Acute Hazards 71136 Secondary Containment 711 54
Chronic Hazards 71138 Emergency Response 71154
IV Leakvolume 71142 VI. Scoring Releares 711 54
Hole Size 71142 Scoring Hazardous Liquid Releases 71155
Matenals 7/143 Scoring Hazardous Vapor Releaqes 711 56
Stresses 71144 ing 71158
Initiatrng Mechanisms 71145 VII. Scores 71159
Release Models 71146 71159
Hazardousvapor Releases 71146 Emergency Response 71162
Hazardous Liquid Spills 71147 VIII. Receptors 71165
HVL Releases 71147 Population Density 7/165
V. Dispersion 71148 Environmental Issues 71166
Jet Fire 71149 Environmental Sensitivity 711 67
Vapor Cloud 71149 High-Value Arcas 71168
Vapor Cloud Ignition 71149 Equivalencies of Receptors 711 70
Overpressure Wave 711 50
Vapor Cloud Size 71150
CloudModeling 71150

Leak Impact Factor Overview B. Leak/Spill Volume (LV)
Leak impact factor (LIF) = product hazard (PH) x leak (L) x dispersion C. Dispersion (D)
(D) xreeeptors (R) D. Receptors (R)
D1. Population Density (Pop)
A. Product Hazard (PH) 1-22 pts D2. Environmental Considerations (Env)
(Acute + Chronic Hazards) D3. High-Value Areas (HVA)
Al. Acute Hazards Total Receptors = (Pop + Env + HVA)
a. N, 0-4 pts
b. N, M pts Note: The leak impact factor is used to adjust the index
c. N, 0-4 pts scores to reflect the consequences of a failure. A higher point
Total (Nf+ N, + N,) &12 pts score for the leak impact factor represents higher consequences
A2. Chronic Hazard (RQ) e10 pts and a higher risk.