CCPS Process Safety Glossary

An index based on the observed average ratio of casualties to the mass of...

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A device for accomplishing simultaneous transmission of two or more signals...

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A substance or agent capable of altering the genetic material in a living...

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National Ambient Air Quality Standards. Glossary 197

An event in which an accident (that is, property damage, environmental...

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The area within a few hundred meters downwind of the source where there is...

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An unplanned sequence of events that could have caused harm or loss if...

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An extraordinary event that could have reasonably, but actually did not,...

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Vapors or aerosol with a specific gravity greater than ambient air so the...

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The net static liquid head that must be provided on the suction side of the...

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A maximal interconnected group of graphical Elements of a Ladder Diagram...

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A gas with density approximately equal to that of air at ambient temperature...

The in-cloud density is equal to the ambient density. Neutral cloud and...

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The ambient boundary layer is well-mixed, with Pasquill stability class D,...

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Acronym for National Fire Protection Association.

National Institute for Occupational Safety and Health of the Public Health...

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Sections of equipment with definite boundaries (e.g., a line between two...

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Industries which do not comprise the CPI as their primary function but which...

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Possessing a conductivity less than 102 pS/m or a resistivity greater than...

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A gas that does not meet the definition of a flammable gas.

Any process operations intended to be performed between startup and shutdown...

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The front surface of vapor cloud, that is, the surface farthest along in the...

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Oxides of Nitrogen; undesirable air pollutants.

Importance: Often...

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NRC

Nuclear Regulatory Commission

Refers to PES equipment status. A PES becomes obsolete if the plant...

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An incident involving injury to workers.

People, property, or the environment located outside of the site property...

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See “Resistance.”

The Current Density (Amperes per square meter) divided by Electric Field...

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Relating to the sense of smell.

Importance: The olfactory organ in...

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A PES is said to be On-Line when it is in active control of a machine or...

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The fraction of the time that a process unit is operating

The temperature at which a deflection from the established baseline is first...

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Defined to be the temperature a which the heat that is released by a...

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A method of control by which signals are transmitted by one or more forward...

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A series of sequential written details describing how to operate equipment...

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