CCPS Process Safety Glossary

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Single-celled organisms, many of which are parasitic (for example, the...

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The cause factor which directly produces the effect without the intervention...

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An activity to determine and status and quality of a PSM program. This term...

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The maximum concentration in air of a toxic material to which the public...

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A cloud of pollutants resulting from a nearly instantaneous or short...

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See Instantaneous Release.

A gas that is continuously or intermittently added to a system to render the...

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The removal of oxygen from a closed system (equipment and piping) to below...

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A chemical that will ignite spontaneously in air at a temperature of 130 F (...

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A gas that will spontaneously ignite in air at or below a temperature of 130...

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A particulate solid that undergoes such vigorous oxidation or hydrolysis (...

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Based primarily on description and comparison using historical experience...

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Refers to the method of evaluation gained through experience (e.g.,...

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Based primarily on description and comparison using historical experience...

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A planned, systematic pattern of actions necessary to provide suitable...

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Activities performed to ensure that equipment is designed appropriately and...

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Refers to the method of evaluation obtained through measurement or...

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The systematic development of numerical estimates of the expected frequency...

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The use of Quantitative Risk Analysis results to make decisions, either...

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A vessel with internal liquid sprays supplied by an external recirculation...

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A closed vessel containing a relatively large volume of liquid. The...

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Rapid cooling from an elevated temperature, e.g., severe cooling of the...

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The largest diameter of a cylindrical tube that will just quench (extinguish...

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The distance between two parallel plates (flat walls) that will just quench...

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The length of a flame arrester element necessary to quench a high speed...

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The heat transferred from one body to another not in contact with it but by...

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Any electrical signal capable of being propagated into and interfering with...

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When a superheated liquid is released to the atmosphere, a fraction of it...

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Memory that allows the user to read or write into in approximately the same...

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Where the time or approximate time of the demand occurrence is predictable,...

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An event or incident whose expected frequency is very small. The event is...

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The rate at which the conversion of reactants takes place. The rate of...

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The original records from which reliability data is extracted; the facility...

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Untreated field-equipment-specific failure information often collected as...

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Chemicals that are converted into the required products during the reaction...

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Any transformation of material accompanied by a change of enthalpy which may...

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