Hazid - Introduction

Hazard Identification INTRODUCTION BY J U P N I M U LYA N A

Definition A hazard is defined as a situation with a potential for causing harm to human safety, the environment, property or business.

The essence of a hazard is that it has a potential for causing harm, regardless of how likely or unlikely such an occurrence might be

Definition Hazard identification (HAZID) is a general risk analysis tool for early identification of hazards to identify possible unwanted incidents/event within a discipline, operation or area. There are two possible purposes in identifying hazards:  To obtain a list of hazards for subsequent evaluation using other risk assessment techniques. This is sometimes known as “failure case selection”.  To perform a qualitative evaluation of the significance of the hazards and the measures for reducing the risks from them. This is

sometimes known as “hazard assessment”.

Objective  Identify areas of major HSE hazard (risk)  Determine what further risk assessments need to be conducted.  Capture any “low hanging fruit” requiring early hazard mitigation action

General Approach HAZID is usually a qualitative exercise based primarily on expert judgement.  The HAZID should be creative, so as to encourage identification of hazards not previously considered.  It should use a structured approach, in order to obtain comprehensive coverage of relevant hazards without skipping less obvious problem areas.  It should make use of accident experience, where available, so as to capture the lessons from previous accidents.  The scope of the HAZID should be clearly defined, so as make clear which hazards should be included and which have been excluded.

Methodology and Procedure The specific steps of the IHAZID Study methodology include:.  Defining the facilities / activities and creating IHAZID “systems”.  Validating the Hazards as required  Brainstorming for each System and Hazard the:  Top Event or Condition of Concern  Causes for the Top Event or Condition of Concern  Consequences without safeguards or control measures  Safeguards or controls measures currently in place, or expected to be in place, to prevent, detect, control, mitigate the event and / or its consequence(s), emergency response, and recovery

Methodology and Procedure  Developing Recommendation required to improve a system and to reduce impact of hazard  Repeating this process for each hazard and each system / activity until all systems have been studied.

FLOWCHART

SELECT SYSTEM

DESCRIBE SYSTEM

HAZID

APPLY HAZARD

PROCESS

IDENTIFY TOP EVENT OR CONDITIONS OF CONCERN

BRAINSTORM CAUSES

IDENTIFY CONSEQUENCE(S) (WITH NO SAFEGUARDS)

NO IDENTIFY SAFEGUARDS / CONTROL MEASURES

NO NO

REQUIRED RECOMMENDATION?

NO

LAST CONDITION OF CONCERN?

YES

LAST HAZARD?

YES

LAST SYSTEM?

YES HAZID SESSION COMPLETE

YES

DVELOP RECOMMENDATON

VISUALISATION TOOLS SYSTEM

1

3

5

5

4

2

Prevent

Detect

Control

Mitigate

Emergency Response

Recovery

HAZID WORKSHEET HAZARD

TOP EVENT

CAUSE

1

2

3

CONSEQUENCE

4

SAFEGUARD

5

RECOMMENDATION

6

REMARK

7