CCPS Process Safety Glossary

Only those data elements and numerical values that are used to specify...

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A time frame established for a given data study.

A system which divides process control functions into specific areas...

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DDA

Deflagration and detonation arresters or deflagration and detonation flame...

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A mode of control wherein digital computer outputs are used to directly...

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A blockage on the discharge side of an operating pump which results in the...

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The interval of time between initiation of an input change or stimulus and...

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Breakdown of a material or substance (by heat, chemical reaction,...

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To undergo chemical breakdown, separating into constituent parts or...

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The maximum amount of energy which can be released upon decomposition. The...

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The decomposition energy is the maximum amount of energy which can be...

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Flames that are produced by exothermic decomposition of certain gases in the...

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Temperature at which spontaneous decomposition occurs. In practice it is...

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Reasoning from the general to the specific. By postulating that a system or...

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Reasoning from the general to the specific. By postulating that a system/...

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Measures directed to reduce the consequences of a runaway to an acceptable...

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Propagation of a combustion zone at a velocity less than the speed of sound...

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A release of energy caused by the propagation of a chemical reaction in...

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A combustion wave (flame) propagating in the unreacted medium at a velocity...

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A flame arrester used to prevent the transmission of a deflagration.

A method employing equipment and procedures that interrupts the propagation...

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The technique of specifying the design pressure of a vessel and its...

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The technique of detecting and arresting combustion in a confined space...

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The transition phenomenon resulting from the acceleration of a deflagration...

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The reduction of pressure generated in a vessel by a deflagration by...

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Dense Gas Dispersion Model (Havens et al., 2001)

A failure which is gradual or partial; it does not cease all function but...

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A specialized logic form of an "AND" gate where all inputs to the gate must...

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A polling of experts utilizing the following procedure:

  1. Select a...
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A polling of experts. The Classical Delphi is a single estimate (for each...

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A plant condition or event which requires a protective system or device to...

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The number of demands divided by the total elapsed operating time during...

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The total number of demands for the data window experienced by the component...

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A failure that is primarily related to the number of times that a device or...

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Cloud density is greater than ambient air density, due to the high molecular...

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A gas with density exceeding that of air at ambient temperature. Sometimes...

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