(161c) Managing the Broken SIS through Peak Risk Analysis

The paper will emphasize the importance of peak risk management to enable the chemical process industry to achieve its business objectives while minimizing the impact of potential risks. Peak risk is associated with a normal operating process when an unexpected failure happens or planned online maintenance is performed. Peak risk focuses on the scenarios where a process is facing an increased level of risk in safety, environmental, and economical aspects. Paper outlines the steps important to document compensating measures for the broken or out of service SIS. Through the implementation of various risk management strategies, the paper will show the ability to minimize potential losses. Additionally, in evaluating LOPA scenarios, in place of using time-at-risk enabling conditions for infrequent, high-risk activities of short duration, use of peak risk concept helps achieve better analysis. This paper clearly articulates and recommends to limit risk reduction to a factor of 10 for non-automated compensating measures for any given LOPA scenario.