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OG - 30
5 days
Doha
13 August, 2023
11900 QAR
Safety Integrity Level/Layer of Protection Analysis (SIL/LOPA)
Course Overview:
This five days training course is intended to give participants a three day overview of the PHA / LOPA process by teaching techniques and tools to assist in guiding teams through the qualitative risk analysis process as well as a 2 day look into SIS/SIL Verification.
The international and US standards for Safety Instrumented Systems (SISs),, require that Safety Integrity Levels (SILs) be determined for Safety Instrumented Functions (SIFs) to meet tolerable risk criteria. The standards identify several methods that can be used for this purpose including Layers of Protection Analysis (LOPA), risk graphs, and risk matrices.
Course Objective:
This course is designed to enable Participants to understand :
- Process safety concepts for SIL determination
- Requirements of SIS standards for SIL determination
- The role of hazard and risk analysis in the allocation of safety functions
- What is meant by a hazardous event
- How to identify SIFs in a process
- How to use risk tolerance criteria in SIL determination
- Procedure for SIL determination
- Use of risk matrices to determine SILs
- Use of LOPA to determine SILs
Who should attend?
This course is beneficial for process safety coordinators, HSE managers, controls and process engineers to understand the value of having properly designed safety systems and generate best practices for their organizations as they develop new SIS programs or enhance existing ones
Course Content:
Module (01) Introduction to LOPA & SIL Verification
- Determine when a LOPA is required
- How to perform a LOPA
- What happens after the LOPA
- Alignment with IEC 61511
Module (02) Elements of LOPA
- Defining the hazardous scenario
- Understanding tolerable risk criteria
- Understanding initiating events and assigning a frequency
- Defining Independent Protection Layers
- Assigning Conditional modifiers to initiating events (Enabling Events)
- Determining SIL and PFD
Module (03) Hazard and Risk Assessment and Functional Safety
- LOPA is part of a process, not an end in itself
- The legal and regulatory background to Hazard and Risk Assessment (and LOPA)
- H&RA (and LOPA) in the functional safety lifecycle
- Hazard Identification prior to LOPA
Module (04) LOPA
- Define the scenario
- Assign severity and target frequency
- Initiating events and frequency
- Enabling events / Conditional Modifiers
- Independent Protection Layers
- Output Results (SIL, PFD)
Module (05) LOPA techniques
- LOPA maths
- Developing scenarios
- The LOPA team
- Tolerable and individual risk
- Cost benefit analysis and ALARP
- Data sources for failure rates
- Human error failure rates
- Alarms as IPLs
- Common cause failures
- Documenting the LOPA
Module (06) What follows the LOPA
- Verification of the LOPA
- The Safety Requirement Specification (SRS)
- Stage 1 Functional Safety Assessment
- The functional safety lifecycle (design, install, commission, validate, operate, maintain, repair)
- Monitoring the assumptions of the LOPA during operations
