Let's refresh some process safety concepts! #SaltegraFYI
Common Mode Failure refers to a situation where multiple components or systems fail simultaneously due to a single shared cause. This happens when redundant systems, designed to provide backup for each other, are all affected by the same issue, rendering the redundancy ineffective.
For instance, if an airplane's primary and backup navigation systems fail because of a software glitch, that's a common mode failure. It’s a critical safety and reliability engineering consideration because it can undermine the safeguards to prevent system-wide failures.
In the chemical process industries, a common mode failure can occur when a single power outage disables multiple safety systems simultaneously, such as cooling, control, and emergency shutdown systems. This can lead to uncontrolled reactor overheating and hazardous material release, highlighting the need for independent safety measures.
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