For instance, a fireball in the centre of the deck level associated with a release rate greater than approximately 5 kg/s would produce fatal radiation levels to a distance about 20m from the fire source. In reality, the fire would soon become ventilation limited and would tend to fill the area with flames lapping out around the perimeter. Release Scenarios For the purposes of the hazard analysis and consequence modelling, a number of representative release scenarios and physical impact are defined in as per Table 19.1. 19.1: Representative Release Cases Hole Release Hole Size / Press. Hazardous Size Case Identification Orientation Leak Type (Bar) Scenario (Inch) 70Bar - Full Bore Gas Rupture [12 Inch] - Full Bore Dispersion Vertical Release - Gas Rupture Dispersion 32 Inch 70 (Catastrophic 70Bar - Full Bore Failure) Rupture [12 Inch] - Jet Fire Vertical Release - Jet Fire 70Bar - Half Bore Gas Rupture [6 Inch] - Dispersion Vertical Release - Gas Half Bore Dispersion 1.0 Rupture 16 Inch 70 70Bar - Half Bore (Major Leak) Vertical Release Rupture [6 Inch] - Orientation Jet Fire Vertical Release - Jet Fire - Pin Hole leak [1 Gas Inch] - Vertical Dispersion Release - Gas Dispersion Pin Hole 70Bar - Pin Hole leak 1 Inch 70 (Minor Leak) Jet Fire [1 Inch] - Vertical Release - Jet Fire 70Bar - Pin Hole leak Jet Fire [1 Inch] - Horizontal Release - Jet Fire 70Bar - Depressurization [10 3.0 Planned Gas 10 Inch 70 Inch] - Vertical Depressurization Depressurization Dispersion Release - Gas Dispersion 4.0 N/A N/A N/A Explosion Explosion scenario Explosion
For instance, a fireball in the centre of the deck level associated with a release rate greater than approximately 5 kg/s would produce fatal radiation levels to a distance about 20m from the fire source. In reality, the fire would soon become ventilation limited and would tend to fill the area with flames lapping out around the perimeter. Release Scenarios For the purposes of the hazard analysis and consequence modelling, a number of representative release scenarios and physical impact are defined in as per Table 19.1. 19.1: Representative Release Cases Release Orientation Hole Size / Leak Type Hole Size (Inch) Press. (Bar) Hazardous Scenario Case Identification 1.0 Vertical Release Orientation Full Bore Rupture (Catastrophic Failure) 32 Inch 70 Gas Dispersion 70Bar - Full Bore Rupture [12 Inch] - Vertical Release - Gas Dispersion Jet Fire 70Bar - Full Bore Rupture [12 Inch] - Vertical Release - Jet Fire Half Bore Rupture (Major Leak) 16 Inch 70 Gas Dispersion 70Bar - Half Bore Rupture [6 Inch] - Vertical Release - Gas Dispersion Jet Fire 70Bar - Half Bore Rupture [6 Inch] - Vertical Release - Jet Fire Pin Hole (Minor Leak) 1 Inch 70 Gas Dispersion - Pin Hole leak [1 Inch] - Vertical Release - Gas Dispersion Jet Fire 70Bar - Pin Hole leak [1 Inch] - Vertical Release - Jet Fire Jet Fire 70Bar - Pin Hole leak [1 Inch] - Horizontal Release - Jet Fire 3.0 Depressurization Planned Depressurization 10 Inch 70 Gas Dispersion 70Bar - Depressurization [10 Inch] - Vertical Release - Gas Dispersion 4.0 Explosion N/A N/A N/A Explosion Explosion scenario