CCPS Process Safety Glossary
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An index based on the observed average ratio of casualties to the mass of... Read More... |
A device for accomplishing simultaneous transmission of two or more signals... Read More... |
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A substance or agent capable of altering the genetic material in a living... Read More... |
National Ambient Air Quality Standards. Glossary 197 |
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An event in which an accident (that is, property damage, environmental... Read More... |
The area within a few hundred meters downwind of the source where there is... Read More... |
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An unplanned sequence of events that could have caused harm or loss if... Read More... |
An extraordinary event that could have reasonably, but actually did not,... Read More... |
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Vapors or aerosol with a specific gravity greater than ambient air so the... Read More... |
The net static liquid head that must be provided on the suction side of the... Read More... |
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A maximal interconnected group of graphical Elements of a Ladder Diagram... Read More... |
A gas with density approximately equal to that of air at ambient temperature... |
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The in-cloud density is equal to the ambient density. Neutral cloud and... Read More... |
The ambient boundary layer is well-mixed, with Pasquill stability class D,... Read More... |
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Acronym for National Fire Protection Association. |
National Institute for Occupational Safety and Health of the Public Health... Read More... |
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Sections of equipment with definite boundaries (e.g., a line between two... Read More... |
Industries which do not comprise the CPI as their primary function but which... Read More... |
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Possessing a conductivity less than 102 pS/m or a resistivity greater than... Read More... |
A gas that does not meet the definition of a flammable gas. |
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Any process operations intended to be performed between startup and shutdown... Read More... |
The front surface of vapor cloud, that is, the surface farthest along in the... Read More... |
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Nuclear Regulatory Commission |
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Refers to PES equipment status. A PES becomes obsolete if the plant... Read More... |
An incident involving injury to workers. |
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People, property, or the environment located outside of the site property... Read More... |
See “Resistance.” |
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The Current Density (Amperes per square meter) divided by Electric Field... Read More... |
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A PES is said to be On-Line when it is in active control of a machine or... Read More... |
The fraction of the time that a process unit is operating |
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The temperature at which a deflection from the established baseline is first... Read More... |
Defined to be the temperature a which the heat that is released by a... Read More... |
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A method of control by which signals are transmitted by one or more forward... Read More... |
A series of sequential written details describing how to operate equipment... |