Indian Oil Corporation Limited (IOCL), has an existing installation at Imphal POL Depot, for the purpose of receipt, storage and dispatch of petroleum products (POL) such as Motor Spirit (MS), High Speed Diesel (HSD) and Superior Kerosene Oil (SKO), Vapor Recovery Unit, Compressed air system and Oil Recovery System.
The main objective of this study is to evaluate the potential risk levels for personnel due to accidental release of hazardous materials from loss of containment scenarios from the facilities and to demonstrate that individual risks are within the broadly acceptable regions. The Objectives of QRA are as follows:
- Identification of the Hazards involved and possible failure scenarios for Depot.
- Calculation of physical effects of failure case scenarios which include Estimation of Jet Fire, Pool Fire heat radiation distances, Flammable gas dispersion distances, and overpressure explosion distances.
- Failure Frequency evaluation.
- Societal risk quantification and Potential Loss of Life estimation.
- Perform a risk assessment to confirm that risk can be reduced consistent with the ALARP principle according to the UK HSE risk acceptance criteria.
- Recommend risk reducing measures such as Prevention, Detection, Control, Mitigation and Emergency response to ensure that all risks are in ALARP or in Acceptable region.
Risk is the general measure of potential economic loss or human injury in terms of the probability of the loss or injury occurring and magnitude of the loss or injury if it occurs.
The main objective of the HAZOP (Hazard & Operability) study is
- To aid in managing project risk through early identification of hazards and operability problems and to reduce the probability and consequences of an incident that would have a detrimental impact to the personnel, plant, properties and Environment.
HAZOP for any project or modification serves many purposes including
- Identify the hazards inherent to the proposal.
- Identify the credible human and/or equipment instrument failures likely to lead to accident scenarios/Operability Problems.
- Qualitatively assess the risk and provide recommendations to overcome the hazards if required.
- In addition to these issues, HAZOP identifies items which could improve unit operations and efficiency
Hazard and Operability (HAZOP) Study is a technique to evaluate the potential hazards which are associated with the Existing facilities and for proposed new facilities of Operation and Maintenance. This study is carried out by a team of engineers from different disciplines. The team looks at each section of a plant or system or operation, considers potential hazards from intended operation and analyses their consequences against any existing safeguards.