Terminologies on On-site and Off-site Disasters Management

Dr. Asit K Patra

Disaster Management Institute

Bhopal

1. Hazard: A chemical or physical condition that has the potential for causing damage to people, property and the environment.

Example: Chlorine storage in Water treatment Plant

LPG storage in Bottling plant

Pressurised pipeline carrying Natural Gas

2. Risk: A measure of human injury/economic loss in terms of both the incident likelihood and the magnitude of loss or injury

Relation between Hazard and Risk

Terminology

3. Risk Analysis

-A Quantitative or qualitative estimate of risk.

4. Risk Assessment

Process of utilising Risk Analysis results with respect to a reference.

5. Disaster/Emergency

Serious disruption of life, injury/death

Affected large number of people and area

Mobilisation of resources in case of those necessary during normal operation.

Terminology

Terminology6. On-site and Off-site

On-site: Consequences are confined within the plant premises

Off-site: Consequences crosses the plant boundary.

On-site Planning: As per Schedule 11 of MS&IHC Rules

Off-site Planning: As per Schedule 12 of MS&IHC Rules

(i) Fire: Pool, Jet, Flash, Fireball

(ii) Explosion : BLEVE, VCE, Dust Explosion (iii) Release of Toxic gas/vapour

Accident Outcomes

(A) Fire : Thermal Radiation (Various damage levels)

(B) Explosion : Overpressure (Various damage levels)

(C) Toxic Release : Concentration (Various damage levels)

Parameters to study Consequences of Accidental Release Scenarios

BLEVE

AN INDUSTRY AFTER VCE

POOL-FIRE

JET- FIRE

Relevant Acts and Rules and Recent Developments

Factories Act, 1948 as amended in 1987

MS&IHC Rules, 1989 as amended in 2000

The PLI Act, 1991 and amended rules 1993

Chemical Accidents (Emergency Preparedness, Planning and Response) Rules, 1996

Disaster Management Act, 2005

EIA Notifications, 2006

NDMA Guidelines on Chemical (Industrial) Disaster Management 2007

NAP-CIDM 2010

For Further Information, Please contact:

asitkpatro@gmail.com

Thanks