Introduction:-
HAZARD IDENTIFICATION & RISK
ASSESSMENT (HIRA)
A Hazard Identification and Risk Assessment (HIRA) assists emergency
managers in answering these questions. It is a
systematic risk assessment tool that
can be used to assess the risks of various hazards.
JOB SAFETY ANALYSIS ASSESSMENT (JSA):-
HIRA:-
There are three reasons why a HIRA is useful to the emergency management profession:
· It helps emergency management professionals prepare for the worst
and/or most likely
risks.
·
Allows for the creation
of exercises, training
programs, and plans
based on the most
likely scenarios.
·
Saves time and resources
by isolating hazards that cannot occur in the designated
area.
Risk is the unwanted consequence of an event or series
of events. Risk occurs when multiple
risk causing factors occur at the same time causing
an accident manifesting in an
event like a fire or explosion. Risk Assessment (RA) is a method that has
proven its value as an all-round
tool for improving
the safety standards prevalent in every hazardous industry.
With advancements in in-built and inherent safety
systems, accidents rates have come down, but still persist
at unacceptable levels for newer technology, new plants and chemical handling
facilities. RA is a structured safety assessment
tools designed for high hazard industries such as chemical, petrochemical, pesticides, pharmaceuticals, sea ports,
etc., supplementing other safety systems tools such as HAZOP, safety audit, and regular incident
analysis to identify
the potential for incidents (near-misses, unsafe conditions) and to evaluate
the necessary control
measures.
Objectives of HIRA study:
- Identify the existing safeguards available to control the risks due to the hazards.
- Suggest additional control measures to reduce the risk to an acceptable level.
·
Prepare a Risk register that will help in continuously monitoring
these risks, detect
any changes and ensure the controls are effective.
Steps involved in Hazard identification and risk assessment:
Step 1: Identification of the Hazard.
Hazard Identification is a critical step in Risk Analysis. Many aids are available, including experience, engineering codes, checklists, detailed process knowledge, equipment failure experience, hazard index techniques, What-if Analysis, Hazard and Operability (HAZOP) Studies, Failure Mode and Effects Analysis (FMEA), and Preliminary Hazard Analysis (PHA). In this phase all potential incidents are identified and tabulated. Site visit and study of operations and documents like drawings, process write-up etc are used for hazard identification.
Step 2: Assessment of the Risk:-
Consequence Estimation is the methodology used to determine the potential for damage or injury from specific incidents. A single incident can have many distinct incident outcomes. Likelihood assessment is the methodology used to estimate the frequency or probability of occurrence of an incident. Estimates may be obtained from historical incident data on failure frequencies or from failure sequence models, such as fault trees and event trees. Risks arising from the hazards are evaluated for its tolerability to personnel, the facility and the environment. The acceptability of the estimated risk must then be judged based upon criteria appropriate to the particular situation.
Step 3: Elimination or Reduction of the Risk
This involves identifying opportunities to reduce the
likelihood and/or consequence of an accident Where deemed to be necessary. Risk Assessment combines the consequences and likelihood of all incident
outcomes from all selected incidents
to provide a measure of risk. The risk of all selected
incidents are individually estimated and summed
to give an overall measure of risk.
Risk-reduction measures include those to prevent incidents (i.e. reduce the likelihood of occurrence) to control incidents
(i.e. limit the extent and duration
of a hazardous event) and to mitigate the effects (i.e. reduce the
consequences). Preventive measures,
such as using inherently safer designs and ensuring asset integrity, should be used wherever practicable. In
many cases, the measures to control and mitigate hazards and risks are simple and obvious
and involve modifications to conform to standard
practice.
The general hierarchy of risk reducing
measures is:
· Prevention (by distance or design)
· Detection (e.g. fire and gas, Leak detection)
· Control (e.g. emergency shutdown
and controlled depressurization)
· Mitigation (e.g. fire fighting and passive fire protection)
· Emergency response
(in case safety barriers fail)
Components of Risk Assessment:
The normal components of a risk assessment study are:
Ø Hazard identification and specification
Ø Risk Review
Ø Recommendations on mitigation measures
Failure case identification
The first stage in any risk assessment study is to identify the potential accidents
that could result
in the release of the hazardous material
from its normal
containment.
Chemical hazards are generally considered to be of three types:
·
Flammable
·
Reactive
·
Toxic
Where there is the potential for confined gas releases, there is also the potential
for explosions. These often produce
overpressures which can cause fatalities, both through direct action on the body or through
building damage. Potential
accidents associated with any
plant, section of a terminal/plant or pipeline can be divided into two categories:
·
There is a possibility of failure
associated with each, mechanical component of the facility/terminal (vessels, pipes, pumps or compressors). There
are generic failures and can be
caused by such mechanisms as corrosion, vibration or external impact (mechanical or overpressure). A small event (such as a leak) may escalate
to a bigger event, by itself causing
a larger failure.
·
There is also
a
likelihood of
failures caused
by
specific operating
circumstances. The prime
example of this is human
error, however it can also include other
accidents due, for example, to reaction runaway
or the possibility of ignition
of leaking tank gases due to hot work.
Classification of Major
Hazard Units:
- ·
Damage of oil storage tanks
and oil leaks into the sea
- ·
In case of fire explosion
- ·
In case of emergency during
ship maneuvering
- ·
In case of vessel or boat collision
Hazard Identification
Identification of hazards
in the proposed jetty is of primary
significance in the analysis, quantification and cost effective control of accidents and process.
Definition of hazard states that,
hazard is in fact the characteristic of system/process that presents potential for an accident. Hence, all the
components of a system need to be thoroughly
examined to assess their potential
for initiating or propagating an unplanned event/sequence of events, which can be termed as an accident.
The following two methods for hazard identification have been employed
in the proposed Jetty Study:
Hazards during Construction Phase
- ·
Mechanical Hazards
- ·
Transportation Hazards
- ·
Physical Hazards
- ·
Storage and Handling
of Hazardous Materials
Hazards during Operation Phase
·
Material Hazards
·
Handling Hazards
Hazards due to Natural
Calamities
·
Earthquake
·
Tsunami
·
Cyclone/Flood
Hazards during Construction Phase
Potential hazards during the construction phase of the project could be due to the mechanical
hazards, navigation/ transportation hazards, physical hazards and storage and handling
of hazardous materials.
Mechanical
Hazards: Mechanical hazards during the construction
phase arise due to the moving parts in the machinery, especially the belts and bolts of the construction equipment, which are heavy
and pose a threat to the work personnel. Other hazards include
falling (during working
at heights), falling
objects like hand held tools,
etc; failure of slips and traps created
for scaffolding; and due to faulting of electrical equipment.
Navigation/
transportation Hazards: Planning of access/egress
to construction site also plays significant role in minimizing the associated hazards
such as vehicles/ barges collision.
Physical Hazards:
The noise and vibrations generated during
construction phase may affect the workers health,
hinder effective communication. In addition to noise and vibration,
hot works also pose a considerable hazard to
the workers.
Hazards during Operational phase
Material Hazards: During operation, Liquid Cargo will be handled
at the proposed facility. The
Liquid cargo hazard classification can be made based on its Characteristics such as Flammability, explosiveness, toxicity or corrosivity etc.
Handling Hazards:
Proposed jetty involves
handling of Liquid Cargo. The hazards related
to edible oil transport and unloading may be due to accidents, breaking of unloading
arms, failure in mechanical components, etc. The handling
hazards include:
·
Insufficient knowledge on hazardous
nature of Liquid Cargo in use leading to inappropriate handling
of the Liquid Cargo.
·
Failure to use appropriate control
measures and Personal Protective Equipment (PPE)
·
Use of expired/worn Personal Protective Equipment’s (PPE’s)
· Failure of liquid delivery
tools.
· Possible hazards
during ship movements
at the port are collision,
grounding, etc.
· Likely hazards during loading
and unloading of Liquid Cargo.
·
During ship unloading operations,
the possible hazard may arise
due to collision by another vessel and
others.
Cargo handling: A fully mechanized ship loading/unloading system
(Pipelines) is planned at the berths. The major
components of the mechanized ship loading/unloading system are Pumps and Pipelines.
Ship
movements/Navigation Hazards: The navigation
hazards during operation phase are
grounding and collision of vessels. However, these would be controlled by
suitable vessel traffic
management.
Ship unloading: During ship unloading operations, possible hazard may arise due to collision
by another vessel and
others.
Transfer
operation: The transfer operation involves transfer
of liquid cargo from ships through
pipelines. During this operation there is a possibility of mal-operation / non- synchronization / misalignment leading to liquid cargo spillage.
Slip and Trip
Hazards: Workers performing cleaning operations are
exposed to slippery working surfaces and tripping hazards.
This places workers
at risk of:
·
Slipping off oily and greasy ladders
·
Slipping and falling
on oily decks
·
Tripping over equipment, hoses and vessel structures
Hazard due to Natural Calamities:
Cyclone, Tsunami and Storm surge are the most
destructive forces among the natural devastations. It causes instant
disaster and burial
of lives and destruction to entire coastal
properties. The damage
and loss can be minimized
if appropriate preparedness plan is formulated. The following statutory guidelines are recommended by National
Types of Disasters |
Risk incurred |
Mitigation steps |
Earthquake |
Highest vulnerability towards
earthquake occurrence (based
on past history) resulting into massive
destruction. |
Structure proposed should
comply as per relevant IS Codes
for Earthquake resistant structures for adequate factor of safety. |
Tsunami |
Kandla region had been affected by Tsunami in past with a
ht. of 12m in 1945.
Thus, it is also one
of the major risks applied
to the SIPC locations. |
Land use planning should be as per the zoning maps by Gujarat State Disaster Management Authority (GSDMA) |
Cyclone |
Gujarat falls in the region
of tropical cyclone
and is highly
vulnerable to associated hazards such as floods,
storm surges etc. Kandla falls
in the belt in which
the wind speed
ranges between 45-47m/sec. Over 120 cyclones originated within Arabian
Sea in past 100 years. Damage to property and life is huge. |
Structure proposed should
comply as per relevant IS Codes for cyclone resistant structures for adequate factor of safety. |
Drought |
Kandla is a drought prone area with
less rainfall Drought vulnerability increases the groundwater exploitation |
Rain water harvesting should be mandatory |
Epidemics |
Outbreak of Epidemics such as swine
flu has been seen in past |
Necessary steps should
be undertaken to have hygienic conditions and medical
assistance within the location to cater to any epidemic |
A Risk Analysis should therefore, be seen as an
important component of any or all on- going
preventive actions aimed at minimizing and thus hopefully, avoiding accidents.
Re- assessments should therefore
follow at regular intervals, and/or after any changes that could alter
the hazard, so contributing to the overall prevention programme and disaster management plan of the project.
Please click on the below link and download all HIRA /JSA
1. Working at height- DOWNLOAD
2. All Activity HIRA- DOWNLOAD
3. All Activity JSA- DOWNLOAD
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