How a Hidden Rusted Valve Nearly Turned Superior Into a Dead Zone
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How a Hidden Rusted Valve Nearly Turned Superior Into a Dead Zone
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概要
A single corroded slide valve invisible from the outside failed inside the fluid catalytic cracking unit, triggering an explosion that sent debris two hundred feet and punctured a 50,000-barrel asphalt tank - sending a dense black smoke plume so large radar mistook it for a storm. Four years of investigation and thousands of documents later, one question remains: how close did this really come to a far worse catastrophe?
In this episode, you will hear what happened at the Superior Refinery on April 26, 2018, the sequence of mechanical failures in the FCCU, and the immediate human and material consequences that followed - was the explosion preventable, and why was the proximity of hydrofluoric acid to the blast suppressed for years?
Person: Husky Energy
Date: April 26, 2018
Location: Superior, Wisconsin
Event: FCCU explosion and asphalt tank rupture
Status: Final report delivered December 29, 2022
- Fifty thousand barrels of heavy crude were processed daily through the Superior Refinery.
- The asphalt storage tank held roughly 50,000 barrels when debris punctured it.
- Debris from the explosion traveled two hundred feet and struck the above-ground asphalt tank.
- The Chemical Safety Board delivered its final report on December 29, 2022 after four years of analysis.
- The corroded slide valve failure was not evident from the outside and was not identified by inspections before the explosion.
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