Qualla: Feyzin Disaster

Feyzin Disaster: Introduction

Sat, 14 Mar 2026 00:00:00 GMT

The operator had only one valve spanner. It was January 4, 1966, just after six in the morning at the Elf refinery near Feyzin, a small town 10 kilometers south of Lyon. A three-man team -- a plant operator, a shift fireman, and a laboratory technician -- was performing a routine task: draining water from a pressurized propane storage sphere. Because the operator could not work both valves simultaneously, he opened them in the wrong order. A jet of propane blasted upward, giving him frost burns on his face and forearm. As he recoiled, he partially pulled off the valve handle. The two men tried to force it back into place and failed. Within minutes, an invisible cloud of propane vapor was drifting toward the nearby motorway.

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Feyzin Disaster: The Walk That Saved No One

Sat, 14 Mar 2026 00:00:00 GMT

The three workers faced a terrible calculation. They needed to raise the alarm, but they feared that starting their truck or even using the telephone might ignite the escaping gas. So they set off on foot. By the time they reached help and traffic on the motorway was stopped, it ...

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Feyzin Disaster: A Word the World Learned That Day

Sat, 14 Mar 2026 00:00:00 GMT

Fire services arrived but faced a phenomenon few had been trained to handle: a BLEVE, or Boiling Liquid Expanding Vapour Explosion. When fire engulfs a pressurized tank of liquefied gas, the liquid inside boils and the rising pressure eventually ruptures the vessel. The result is...

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Feyzin Disaster: Eighteen Lives, Eighty-One Injuries

Sat, 14 Mar 2026 00:00:00 GMT

When the final count came in, 18 people were dead and 81 injured. The dead included firefighters who had positioned themselves close to the burning spheres in an attempt to prevent exactly the chain reaction that occurred, and spectators who had gathered to watch the blaze -- dra...

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Feyzin Disaster: The Lessons Written in Fire

Sat, 14 Mar 2026 00:00:00 GMT

Feyzin forced a fundamental rethinking of how the petrochemical industry handles pressurized liquefied gas storage. The disaster demonstrated that BLEVEs produce intense but relatively localized thermal radiation compared with unconfined vapor cloud explosions, meaning that evacu...

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