CCPS Process Safety Glossary

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A programming language using Ladder Diagrams for representing the...

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A textual programming language using assignment, sub-program control,...

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A system consisting of a well-defined, usually finite, set of characters;...

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See "Slip Flange".

Partial differential equation applying to potential distribution for any...

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A computer chip containing a large number of digital circuits in a small...

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Failure in a component as a result of a hidden flaw.

Second law of thermodynamics that states that energy can only change in form...

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A formula describing the profile of the mean velocity close to the surface,...

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The minimum temperature at which a dust layer will self-heat.

A concept whereby a device, system, or human action is provided to reduce...

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An approach that analyzes one incident scenario (cause-consequence pair) at...

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See "Safety Layer".

A concept whereby several independent devices, systems, or actions are...

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The relative location of equipment or buildings within a given site.

Process-oriented metrics, such as the degree of implementation or...

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A forward-looking set of metrics that indicate the performance of the key...

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In the Dutch regulatory context, an off-site population characterized by a...

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Applying knowledge gained from past incidents in current practices.

A concentration of a substance being tested which will kill a test animal....

The concentration of a material in air which, on the basis of laboratory...

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A concentration of a substance being tested which will kill a test animal....

A single dose of a material which on the basis of laboratory tests is...

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Service utilizing poisonous gases or liquids of such a nature that a very...

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Good, successful, common, or best practices in PSM that have evolved, either...

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The concentration of an airborne chemical above which there may be adverse...

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The stages that a physical process or a management system goes through as it...

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A cloud with density less than that of the ambient air. Synonymous with...

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Hypothetical discharge in large volumes containing clouds of charged,...

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A measure of the expected probability or frequency of occurrence of an event...

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The potential for causing a catastrophic event by defeating the...

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The upper limit dose used in testing (2000 5000 mg/kg)

Incidents deemed to be controllable with local resources and which have no...

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Specifications for critical systems that must be operational and critical...

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The concentration of oxidant, in a fuel-oxidant-diluent mixture below which...

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Any flammable gaseous material or mixture of materials that is in liquid...

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