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Control of Industrial Major Accident Hazards (CIMAH) Report Page 14
Ranhill SAJ Sdn. Bhd. Revision 01
Part D: Information on the Potential Major Accident Date Aug 2019

Table D.2.4 below summarized the scenarios modeled.

Hazardous Potential Major
Location Hazardous Event
Substance Accident

Chlorine Cylinder Catastrophic
Failure / Rupture
(Door Opened)
KT1 Chlorine Chlorine Cylinder 50mm Hole Toxic Gas
Room Chlorine Diameter Leak (Door Opened) Dispersion

Chlorine Cylinder 10mm Hole
Diameter Leak (Door Opened)
Chlorine Drum Catastrophic
Failure / Rupture
(Scrubber Failure)

Chlorine Drum Catastrophic
KT2 Chlorine Chlorine Failure / Rupture Toxic Gas
Room (Door Opened) Dispersion
Chlorine Drum 50mm Hole
Diameter Leak (Door Opened)

Chlorine Drum 10mm Hole
Diameter Leak (Door Opened)

Table D.2.4: Outcomes / Potential of Major Accident

D.2.5 Physical Effects Modelling

The objective of consequence modelling and analysis is to identify the extent of the
consequences and determine people, asset and environment that will be affected.
The main consequences arising from chlorine gas to people is its toxic effect as
stipulated from the chemical safety data sheet and other publications.

D.2.5.1 Probit Analysis

The toxicity model used in this assessment is based on the Probit analysis. Probit
function analysis are used to calculate the probability of death due to toxic
substances at a given exposure. The Probit equation for toxic effects is as follows: