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3.4 SIMOPS Risk Evaluation and Risk Assessment



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SIMOPS Risk Assessment - AIDIC

 
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3.4 SIMOPS Risk Evaluation and Risk Assessment 
In accordance with HSE (Health Safety Environment) management system of the plant owner, the risk 
associated to each identified SIMOPS scenario was evaluated through semi-quantitative risk assessment 
method as per below risk matrix. 
Figure 2: Semi-Quantitative Risk Assessment Matrix 
The risk matrix is divided into three risk categories as defined below: 
• High Risk – this level of risk exposes to intolerable losses to people, assets, environment or reputation; the 
hazard should be eliminated or its risk reduced to tolerable levels immediately. 
• Medium Risk – acceptable but must be managed at ALARP; the hazards must be managed to reduce the 
frequency and/or the severity of the hazardous events to ALARP (as low as reasonably practicable), the 
words “reasonably practicable” imply that the solution must be capable of implementation and that the 
benefits should be greater than the disadvantages and costs. 
• Low Risk – acceptable without requiring further action; corrections may be applied as resources allow. 
Two different risk levels were assessed. The first was set without considering any risk reduction measures, 
and the second one taking credits from control measures and operating procedures existing or planned to be 
carried out during the execution of the concerned activity. If the risk level mitigated by planned 
countermeasure was still high or in ALRAP region of the above risk matrix, additional risk reduction measures 
were identified by workshop members in order to further control and reduce the associated risk.
To each identified countermeasure the subject responsible for its implementation was defined and agreed by 
all team member. Its name was clearly written down in the SIMOPS worksheet. Clear responsibility 
assignment is a key step for successful execution SIMOPS.
Table 3: List of typical risk reduction measures for SIMOPS 
Scaffolding removed or if necessary wood boards to be replaced with metal type 
Antispark tools to be used 
Barricade and Access Control / Signages 
Commissioning Permit To Work properly in place 
Commissioning awareness 
Emergency Response Plan 
Permanent Firefighting equipment and Fire&Gas detection system in service 
Provide temporary firefighting devices if the permanent ones are not yet ready 
Provide temporary Fire&Gas detectors if the permanent system is not ready 
Equipment / tools periodically checked (colour coding to be ensured) 
Housekeeping, escape way not obstructed 
Identification of focal points for the activity 
Live Lines Identified 
LOTO isolation procedure and register under LOTO Coordinator responsibility 
Risk notification (Safety Alert, STARRT, Tool Box Talk) 

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