CCPS Process Safety Glossary

To terminate a procedure, such as the running of a computer program or the...

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The application of CPQRA in which the results of the analysis are compared...

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A technique in which a substance is heated in stages until very slow...

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An undesirable, unplanned combination of events or circumstances that lead...

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An event in which property damage, detrimental environmental impact, or...

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An unplanned event or sequence of events that results in undesirable...

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An unintended, or sudden release of chemical(s) from manufacturing,...

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American Conference of Governmental Industrial Hygienists; an organization...

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A method of logging progress when implementing a task or set of tasks.

Constant Ea in the exponential part of the Arrhenius equation associated...

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The constant E in the exponential part of the Arrhenius equation, associated...

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Denotes physical motion or activity in the performance of the equipment's...

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A system in which failures are immediately evident during normal operation...

An adverse effect on a human or animal body, with severe symptoms developing...

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A short-term or rare exposure to a toxic agent in a single episode that is...

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The potential for injury or damage to occur as a result of an instantaneous...

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The adverse (acute) effects resulting from a single dose or exposure to a...

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An incident investigation fashioned from the immediately available...

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A system condition in which no heat is exchanged between the chemical system...

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No heat transfer occurs to or from the environment
surrounding the...

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An estimation of the computed temperature which a specimen would attain if...

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Induction period to event (spontaneous ignition, explosion, etc.) (ri) under...

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See Dry Adiabatic Lapse Rate.

Maximum increase in temperature that can be achieved. This increase only...

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Procedural mechanisms, such as lockout/tagout procedures, for directing and/...

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The transport of material by and in the wind

The fraction of liquid phase, 1 – x, which, after flashing to the atmosphere...

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The principal object, substance, or material inflicting the physical harm or...

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The statistical combination of several data points to form a single data...

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Air

Sea level concentrations of the six principal constituents of dry air are...

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The control of the level of pollutants prescribed by regulations that may...

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Procedures, schematic, software, maintenance, documentation, hardware, logic...

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Distance in the direction the vapor cloud is traveling, i.e. the wind...

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A device or system that is comprised of components that meet both the...

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Hardware operation that alternates between standby and running, e.g., a pump...

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The basis for an off-site consequence analysis required by the EPA RMP Rule...

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