460
P. Srinivas and M. Elangovan
No
Yes
Identify
allFailure
Consider a Potential
failure mode
Identify potential effects of failure mode
Identify potential
causes of failure mode
Identify current condition & design verification process
Determine Severity
(S)
Determine occurrence
of probability (P)
Determine delectability (D)
Identify actions
for improvements
Determine:
RPN=SxPxD
Failure
modes left?
Document
Fig. 1 FMEA flowchart
3 Result
3.1 Storage Area
Generally, TDI receiving in 200 kg barrels from supplier will be unloaded and stored
at TDI storage. Due to increased production, the storage capacity made to 16 tons.
Barrels unloading from truck will be carried out by barrel unloader with safety
precautions but due to any accidental falling of 200 kg barrel may rupture and TDI
spillage which may lead to emergency situation, and for this situation, suitable public
exposure guidelines are adopted in ALOHA 5.4.7 software and evaluated the safe
distance for residential colony.
Figure 2 showing the threat zone for TDI spillage using ALOHA software, and
for developing this, we have taken following considerations:
• 200 kg of TDI spillage by barrel rupturing
• Release duration 1 min
• Wind velocity 2 m/s
• Air temperature 35 °C
• Relative humidity 75%
• Public exposures guideline—ERPGs-Emergency Response Planing Guideline.
By giving above inputs to ALOHA 5.4.7 software, we have found threat zone
which indicated in red, orange, and yellow colors and distances found as follows:
P. Srinivas and M. Elangovan
No
Yes
Identify
allFailure
Consider a Potential
failure mode
Identify potential effects of failure mode
Identify potential
causes of failure mode
Identify current condition & design verification process
Determine Severity
(S)
Determine occurrence
of probability (P)
Determine delectability (D)
Identify actions
for improvements
Determine:
RPN=SxPxD
Failure
modes left?
Document
Fig. 1 FMEA flowchart
3 Result
3.1 Storage Area
Generally, TDI receiving in 200 kg barrels from supplier will be unloaded and stored
at TDI storage. Due to increased production, the storage capacity made to 16 tons.
Barrels unloading from truck will be carried out by barrel unloader with safety
precautions but due to any accidental falling of 200 kg barrel may rupture and TDI
spillage which may lead to emergency situation, and for this situation, suitable public
exposure guidelines are adopted in ALOHA 5.4.7 software and evaluated the safe
distance for residential colony.
Figure 2 showing the threat zone for TDI spillage using ALOHA software, and
for developing this, we have taken following considerations:
• 200 kg of TDI spillage by barrel rupturing
• Release duration 1 min
• Wind velocity 2 m/s
• Air temperature 35 °C
• Relative humidity 75%
• Public exposures guideline—ERPGs-Emergency Response Planing Guideline.
By giving above inputs to ALOHA 5.4.7 software, we have found threat zone
which indicated in red, orange, and yellow colors and distances found as follows: