April, 2018

This is a repeating event

201826AprAll DayHusky Energy Refinery Explosion 2018Husky Superior (US-WI) Origin: CSB Lessons:Process KnowledgeIndustry:RefiningCountry:United StatesLanguage:ENLoC:Maintenance error

Summary

On April 26, 2018, an explosion and subsequent fire occurred at the Superior Refinery Company LLC refinery in Superior, Wisconsin (‘Husky Superior Refinery’). The incident occurred in the refinery’s Fluid Catalytic Cracking Unit (FCCU). In preparation for the shutdown, the refinery brought in hundreds of contractors and increased operations staffing. The contractors were performing many tasks such as electrical work, preparing for chemical cleaning, building scaffolding, and welding. As a result of the explosion, thirty-six people sought medical attention, including eleven refinery and contract workers who suffered OSHA recordable injuries. In addition, a large portion of Superior, Wisconsin was evacuated. The refinery was shutting down in preparation for a five-week turnaround when an explosion occurred, sending several people to area hospitals with injuries.

KEY ISSUES:
• PYROPHORIC IRON SULFIDE


Image credit: CSB

Origin

CSBUS Chemical Safety Board

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