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Definitions (1703)

1.

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Accident


An unplanned event or sequence of events that results in an undesirable consequence.
Source: aiche.org

2.

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Installation


In the context of the EU Seveso Directive (Seveso 2), a technical unit within an establishment in which dangerous substances are produced, used, handled, or stored. It includes all the equipment, stru [..]
Source: aiche.org

3.

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Insolation


Solar radiation heat loading (Watts/m2).
Source: aiche.org

4.

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Purging


The removal of oxygen from a closed system (equipment and piping) to below the LOC of the particulate solid by means of applying pressure, vacuum, and/or a purge gas.
Source: aiche.org

5.

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Word


A data element of length 16 bits.
Source: aiche.org

6.

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Abnormal Situation


A disturbance in an industrial process with which the basic process control system of the process cannot cope. In the context of hazard evaluation procedures, synonymous with deviation.
Source: aiche.org

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Abort


To terminate a procedure, such as the running of a computer program or the printing of a document while it is still in progress. The process of halting a computer program in an orderly fashion and ret [..]
Source: aiche.org

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Acceptance criteria


Technical basis used to determine whether equipment is deficient (e.g., when analyzing inspection, testing, and preventive maintenance [ITPM] results).
Source: aiche.org

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Acceptable Risk


The average rate of loss that is considered tolerable for a given activity.
Source: aiche.org

10.

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Accelerating Rate Calorimetry


A technique in which a substance is heated in stages until very slow decomposition [or other reaction] is detected. The substance is then held under adiabatic conditions and the course of the decompos [..]
Source: aiche.org


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