Risk matrix consequence range

Hazard assessment is a consequence analysis for a range of potential hazardous chemical releases, including the history of such releases at the facility. The releases must include the worst-case scenario and the more likely but significant accident release scenarios. A risk matrix can be used to characterize the worst-case and more likely scenarios. 

There are several standard guidelines and published risk matrices, but at the beginning one has to decide the intent for which it is to be developed. Table 1/3.3.2-1 is an example of a risk matrix available from CCPS. Tables 1/3.3.2-2—1/3.3.2-4 show the explanation of risk levels, likelihood, and consequence range criteria for the risk matrix in Table 1/3.1.4-1 (based on technical review by MS. D. Aptikar). 

Table 5.1 shows the risk matrix table that presents in a tabular format, a risk level related to the frequency and severity of a hazard. RRN ranges from 1 (least frequent and least severe consequence) to 10 (most frequent and most severe consequence). 

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