CCPS Process Safety Glossary

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Maximum concentration levels that provide guidance in advance planning for...

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A PSM program element involving work activities to plan for and respond to...

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Process changes initiated by the operations staff to place the process into...

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A device that is designed to open during emergency or abnormal conditions to...

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A written plan which addresses actions to take in case of plant fire,...

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A system of guidelines for airborne concentrations of toxic materials...

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An automatic sequence initiated by an interlock. The sequence may consist...

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A device that is designed to shutdown the system to a safe condition on...

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The safety system which overrides the action of the basic control system...

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A hard-wired push button that, when pushed, will maintain the trip position...

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The ratio of the radiant energy emitted by a surface to that emitted by a...

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A condition that is not a failure, error or a protection layer but makes it...

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An event that makes another event possible. Sometimes used for enabling...

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A deflagration flame arrester that is installed on atmospheric pressure tank...

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The continual presence of a disease in a population.

A physical or chemical change that requires or is accompanied by the...

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A reaction involving one or more chemicals resulting in one or more new...

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The furthest extent in an incident sequence to which a Layer of Protection...

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Steady burning of a stabilized flame at or close to the flame arrester...

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A test in which a flame arrester is subjected to a stable flame on the...

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The cube root of the TNT equivalent mass, W1/3.

A specific hardware or software system designed to maintain a process...

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To draw in and transport (as solid particles, liquid droplets, or gas) by...

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A factor used to adjust a given failure rate up or down depending upon...

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The analysis of the impact that a proposed development, usually industrial,...

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Areas requiring special management attention to protect important scenic...

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Occurrence of a disease within a specific area or region in excess of its...

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An unplanned event of limited duration, usually associated with an accident...

A release of limited duration usually associated with an accident.

a molecular region on the surface of an antigen capable of eliciting an...

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A piece of hardware which can be defined in terms of mechanical, electrical...

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Demarcation of the equipment defining components included and interfaces...

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A grouping of individual equipment items with similar design and operation,...

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A condition that does not meet the acceptance criteria.

A systematic approach for analyzing equipment failures to determine the...

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The probability that, when operating under stated environment conditions,...

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