CCIDENT CONSEQUENCE ANALYSIS
Consequence means effect or result of a specific event.
Accident
Consequence Analysis is an analysis of the expected effects of an accident,
independent of frequency and probability.
Mostly
this is carried out after the completion of Risk Assessment to predict the
consequences i.e. severity of the effects due to the assumed worst or maximum
credible accident scenarios. See part 3.100.
With
accident consequence analysis, the Vulnerability Analysis may be carried out of
the persons, property and environment adversely affected.
Computer
software is useful in carrying out consequence analysis and vulnerability
analysis.
In such
type of analysis, determination of following things is important –
1. Type of
substance being released e.g. gas, liquid or liquid with vapour etc.
2. Type of
release i.e. instantaneous, continuous, intermittent etc.
3. Leak rate or outflow volume and rate of evaporation in case
of liquid pool
4. Dispersion calculation of the released mass. Parameters of
atmospheric conditions are considered e.g. wind speed, weather condition
(stability class) cloudiness, terrain conditions and sinking mechanism and
absorption (influence of tree, houses etc. as obstruction of toxic gases.)
5. Damage distances i.e. damaging concentration or effect of fire
or explosion at different distances in the direction of wind or other showing
these distances and effects.
6. Severity of the effect i.e. vulnerability in terms of
possible deaths, injuries, destruction of building or damage to environment.
Use of probit equation.
7. Plotting of ‘risk counters’ on the area map of place of
release and vicinity. Counters should indicate low, medium and high risk areas.
No comments:
Post a Comment