Layer of Protection Analysis (LOPA) / SIL Selection

Course Description

Selection of the Safety Integrity Level (SIL) for a Safety Instrumented System (SIS) is a risk assessment problem that requires understanding of the hazard. This procedure involves establishing tolerable risk guidelines and determining the risk posed by the process prior to implementing an SIS. Several methods are currently being used in industry to perform these tasks. This course describes the basic risk assessment tasks that must be performed to select an SIL, explains tolerable risk criteria and gives examples of targets that are currently being used in industry, presents several methods for SIL selection, and describes Layer of Protection Analysis (LOPA)in detail.

• How to assess the risk of a process hazard.
• How to establish tolerable risk guidelines.
• How to use common SIL selection methods.
• How to develop and quantify a simple fault tree.
• How to perform a Layer of Protection Analysis.
• How to consider multiple initiating events and outcomes in a LOPA study.

• Control Engineers
• Safety Engineers
• Plant Risk Analysts

• Risk assessment overview, SIL selection objectives, rules of obability, probability exercise, consequence estimation, likelihood estimation, event trees, event tree exercises, LOPA diagrams, LOPA diagram exercise.
• Obtain and use LOPA data, effectiveness of an operator, Safety tegrity Level selection, SIL exercise, comprehensive LOPA analysis, LOPA exercise.

2 Days

DOWNLOAD BROCHURE