10. Glossary
Major accident
An event such as a major emission, fire or explosion resulting from uncontrolled development during operation, causing a serious immediate or delayed danger to human health or the environment, inside or outside the establishment, and involving one or more dangerous substances or preparations.
Defense barrier
A defensive barrier is either a piece of safety equipment, or an operation performed by an operator to prevent the chain of events that could lead to a major accident.
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Glossary
Editor's note
This article is an updated version of the fact sheet written by Sandrine CHEVILLON.
Regulatory reference
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article R. 512-29
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