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incident-investigation

Husky Superior Refinery: When a Turnaround Exposed a Transient Hazard

The 2018 Husky Superior Refinery explosion occurred during a planned turnaround, when the refinery was moving through a temporary operating state with hundreds of workers on site. The U.S. Chemical Safety and Hazard Investigation Board found lessons that reach beyond refinery engineering. A transient hazard becomes a leadership test when the work changes faster than the control system, contractors, operating assumptions, and emergency decisions can keep pace.

6 min