Risk Assessment on Storage and Handling of Highly Toxic …
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These three-tiered guidelines can be used as toxic level of concern (LOC), while
modelling a toxic chemical release in ALOHA [2]. By using LOCs, ALOHA generates a threat zone estimation, and it indicates red, orange, and yellow zones in which
the red zone indicates the most hazardous LOC.
2.1.2 Acute Exposure Guideline Levels (AEGLs)
Designed to help general public (responders) deal with emergencies involving chemical spills or other catastrophic events where members of the general public are
exposed to a hazard airborne chemical.
2.1.3 Emergency Response Planning Guidelines (ERPGs)
Designed to anticipate health effects from exposure to certain airborne chemical
concentrations.
2.1.4 Temporary Emergency Exposures Limit (TEELs)
During an emergency situation, TEEL is designed to estimate the action of members
of the general public at different concentrations of a chemical.
2.2 Handling/Process Area
For hazard identification at risk assessment at TDI handling/process area, many
techniques available in which following are commonly used hazard identification
techniques:
• What-if checklist
• Preliminary hazard analysis (PHA)
• Hazard and operability studies (HAZOP)
• Failure modes effect analysis (FMEA)
• Failure mode effect and criticality analysis (FMECA)
• Fault tree analysis
• Even tree analysis
• Layers of protections analysis (LOPA)
• Humans reliabilities assessment (HRA).
Among above, here, we are considering that failure modes effect analysis (FMEA)
is suitable hazard identification method for TDI storage as this process area contains
equipment, and FMEA is king in equipment and machinery area for hazard analysis
[3]. FMEA process flowchart is shown in Fig. 1.
459
These three-tiered guidelines can be used as toxic level of concern (LOC), while
modelling a toxic chemical release in ALOHA [2]. By using LOCs, ALOHA generates a threat zone estimation, and it indicates red, orange, and yellow zones in which
the red zone indicates the most hazardous LOC.
2.1.2 Acute Exposure Guideline Levels (AEGLs)
Designed to help general public (responders) deal with emergencies involving chemical spills or other catastrophic events where members of the general public are
exposed to a hazard airborne chemical.
2.1.3 Emergency Response Planning Guidelines (ERPGs)
Designed to anticipate health effects from exposure to certain airborne chemical
concentrations.
2.1.4 Temporary Emergency Exposures Limit (TEELs)
During an emergency situation, TEEL is designed to estimate the action of members
of the general public at different concentrations of a chemical.
2.2 Handling/Process Area
For hazard identification at risk assessment at TDI handling/process area, many
techniques available in which following are commonly used hazard identification
techniques:
• What-if checklist
• Preliminary hazard analysis (PHA)
• Hazard and operability studies (HAZOP)
• Failure modes effect analysis (FMEA)
• Failure mode effect and criticality analysis (FMECA)
• Fault tree analysis
• Even tree analysis
• Layers of protections analysis (LOPA)
• Humans reliabilities assessment (HRA).
Among above, here, we are considering that failure modes effect analysis (FMEA)
is suitable hazard identification method for TDI storage as this process area contains
equipment, and FMEA is king in equipment and machinery area for hazard analysis
[3]. FMEA process flowchart is shown in Fig. 1.