Learn about Mechartes work on Chlorine Gas Dispersion Analysis

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CHLORINE GAS DISPERSION ANALYSIS

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OBJECTIVE
To study the impact of accidental release of
1.6 tons of Chlorine gas in surrounding areas
from a horizontal cylindrical tank lasting for
one hour.

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Different Threat Zones (Red, Orange and
Yellow Zone) For Chlorine Release

4. The impact is studied using standard dispersion modeling
techniques considering various locations with different surface
conditions in different seasons and meteorological conditions.
The affected areas which are harmful to human exposures at
different levels are detected. The affected areas are divided
into three level of concerns namely red zone, orange zone,
yellow zone.
DESIGN APPROACH
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Variation of Different Threat Zones with
Temperature

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Variation of Different Threat Zones with
Temperature

7. The length of red zone (average chlorine concentration in 60
minutes is more than 20 ppm) has been estimated to be 1.1
kilometers, Orange zone (average chlorine concentration in 60
minutes is more than 2 ppm) 3.6 kilometers and yellow zone
(average chlorine concentration in 60 minutes is more than 0.5
ppm) 7 kilometers, respectively downwind from the source.
With all other conditions constant, a threat zone is likely to be
smaller with increasing ground roughness and wind velocity.
CONCLUSION
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The length of a threat zone is likely to rise with increasing
temperature as temperature affects atmospheric stability.

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