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Risk-Based Inspection

API ICP Self Study Notes

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4.1.15<br />

event tree 事 件 树<br />

An analytical tool that organizes and characterizes potential occurrences in<br />

a logical and graphical manner. The event tree begins with the<br />

identification of potential initiating events. Subsequent possible events<br />

(including activation of safety functions) resulting from the initiating events<br />

are then displayed as the second level of the event tree. This process is<br />

continued to develop pathways or scenarios from the initiating events to<br />

potential outcomes.<br />

4.1.16<br />

external event 外 部 事 件<br />

Events resulting from forces of nature, acts of God, sabotage, or events<br />

such as neighboring fires or explosions, terrorism, neighboring hazardous<br />

material releases, electrical power failures, forces of nature, and intrusions<br />

of external transportation vehicles, such as aircraft, ships, trains, trucks, or<br />

automobiles. External events are usually beyond the direct or indirect<br />

control of persons employed at or by the facility.<br />

API 580<br />

Charlie Chong/ Fion Zhang

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