© Palaniappan R Kannan PMP.,CFSE 1 IEC 61508 Standard – What is it? IEC 61508 is a Standard for the functional safety of Electric / Electronic / Programmable.

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Presentation transcript:

© Palaniappan R Kannan PMP.,CFSE 1 IEC Standard – What is it? IEC is a Standard for the functional safety of Electric / Electronic / Programmable Electronic (E/E/PE) Safety related systems

© Palaniappan R Kannan PMP.,CFSE 2 IEC Overall Safety Lifecycle Overall Installation and commissioning Decommissioning or disposal Overall operation and maintenance and repair Overall modification and retrofit 15 Back to appropriate overall safety life cycle phase Safety related systems: E/E/PES 9 Realization (see E/E/PES safety lifecycle) External risk reduction facilities 11 Realization Safety related systems: other technologies Realization 10 Overall operation & maintenanc e planning 6 Overall planning Concept Overall scope definition2 1 Hazard and risk analysis Overall safety requirements4 3 Safety requirements allocation5 Overall validation planning 7 Overall installation and commissioning planning 8 Overall safety validation13

© Palaniappan R Kannan PMP.,CFSE 3 Purpose of IEC To provide a right safety system for the facility and to avoid under protection and over protection, both of which costs money. Under protection results in increased risk cost while, Over protection results in higher procurement and maintenance cost.

© Palaniappan R Kannan PMP.,CFSE 4 IEC – Where recommended? Following are the areas in the process industry that IEC61508 is applicable: Emergency Shutdown System (ESD). Fire & Gas System (F&G). Turbine Control. Burner Management.

© Palaniappan R Kannan PMP.,CFSE 5 Functional Safety Assessment – What is it? 1.Safety System Project has various phases in its lifecycle. 2.Functional Safety Assessment is a critical activity that checks and reviews output of each phase to make sure that the Functional Safety has actually been achieved. 3.Based on the Risk level (Safety Integrity Level) an Independent person or an independent organization is required to carry out Safety Assessment.

© Palaniappan R Kannan PMP.,CFSE 6 Functions of Assessment 1.To review that hazard and risk assessments and make sure their recommendations implemented or resolved. 2.To make sure the Safety Instrument System is designed, constructed and installed in accordance with Safety Requirements Specifications. 3.To review Safety Validation Planning and make sure all Validation activities have been completed. 4.To make sure recommendations from previous assessments and audits are resolved, and plans for future are in place. 5.Outputs of assessments are in the form of recommendations.

© Palaniappan R Kannan PMP.,CFSE 7 Safety System Audits Functional Safety System Audits are part of Functional Safety Assessment, applicable to Operation, Maintenance and Repair phase of the lifecycle. This makes sure that all the Safety Assessment functions are complied with and documented. This also makes management and staff aware of degree of implementation and effectiveness of their Safety Instrument System. This should be a periodic (say, once in three years), systematic and independent examination.

© Palaniappan R Kannan PMP.,CFSE 8 Safety System Audit - Reports The outputs of Safety System Audits are in the form of reports. These are in the form of action plans for improvement and Safety Instrument System(SIS) implementation as per IEC standards. These reports shall be verifiable.

© Palaniappan R Kannan PMP.,CFSE 9 Facility HSE Audit Safety Instrument System Audits can be part of HSE audit as called for in EPA and OSHA.