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Risk-Based Inspection

API ICP Self Study Notes

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If probability and consequence are not expressed as numerical values, risk is<br />

usually determined by plotting the probability and consequence on a risk<br />

matrix (see 12.6). Probability and consequence pairs for various scenarios<br />

may be plotted to determine risk of each scenario. Note that when a risk<br />

matrix is used, the probability to be plotted should be the probability of the<br />

associated consequence, not the POF. Also note that the overall risk must<br />

include the probability of loss of containment. For example, if the probability of<br />

loss of containment is 0.1, the overall risk above is 0.1 × $100/year =<br />

$10/year. 使 用 风 险 矩 阵 , 要 绘 制 的 概 率 应 该 是 相 关 情 景 的 结 果 的 概 率 而 不 是 故<br />

障 概 率 . 总 体 风 险 = 情 景 风 险 x 溶 液 流 失 概 率<br />

Note that when a risk matrix is used, the<br />

probability to be plotted should be the<br />

probability of the associated consequence,<br />

not the POF.<br />

API 580<br />

Charlie Chong/ Fion Zhang

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