11. 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 defense barrier consists of safety equipment or an operation performed by an operator to prevent the chain of events that could lead to a major accident.
Danger
Intrinsic property of a substance, a technical system, an arrangement, an organism, etc. likely to cause damage to a "vulnerable element".
IPS element
To qualify as important to safety (IPS), an item (operation or equipment) must be chosen...
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Editor's note
This article is an updated version of the fact sheet written by Sandrine CHEVILLON.
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