CCPS Process Safety Glossary

The number of occurrences of an event per unit of time.

The number of occurrences per unit time at which observed events occur or...

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The fundamental scaling velocity, equal to the square root of the surface...

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When water is present or enters a tank containing hot viscous oil, the...

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Gaseous fuels consisting of natural gas and various manufactured or by-...

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Emissions of material from process equipment due to leakage.

A deflagration explosion developed from a flammable cloud of gas, aerosol,...

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Field experiments of flow and dispersion around full sized obstacles (e.g...

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Flow in a long, constant area pipe in which the mean velocity profiles are...

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Failures from a system that works as designed but are inadequate for the...

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A phase in the development of computerized systems which produces detailed...

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A device that is electrically and optically workable, used to demonstrate...

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A phase in the development of computerized systems in which all inputs to...

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The burning velocity is the rate of flame propagation relative to unburned...

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Gram: a metric unit of weight. One U.S. ounce is about 28.4 grams.

Grams per kilogram; an expression of dose used in oral dermal toxicology...

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US Liquid Measure equal to 3.785 ¥ 10-3 m3.

A detonation that periodically fails and reinitiates during propagation....

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Gas

The state of matter characterized by complete molecular mobility and...

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The addition of another flammable gas to a gas–air mixture to raise the...

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A dispersion model based on the concept that atmospheric diffusion is a...

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A class of transport and dispersion model which assumes that the...

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A system for exhausting air containing contaminants from a general work area...

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Data which is typical for a system. Such data will not have been collected...

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Relating to the engineering field which combines geology and engineering. (...

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See “Surface Streamer.”

A computer program technique the purpose of which is to prevent catastrophic...

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The eddy diffusivity coefficient K is used to solve the mass conservation...

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Totally new facility that may be built upon a greenfield or brownfield site...

Downward velocity of particles due to gravity (about 10 cm/s for an aerosol...

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The decrease in cloud height of a flowing dense gas due to the effects of...

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Undeveloped property that is being considered as a site for construction. (...

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Type of pipe connection that might result in electrical isolation by gasket...

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Commercially available device which automatically senses the presence of...

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Source emissions from near ground level.

Grounding is a conducting connection between a piece of equipment or...

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