EPRI Core Protection NANTeL Practice Test

PRA is used when performing significance determinations within the Significance Determination Process.

True False Not Applicable Sometimes

Correct Answer:

True

Explanation:

PRA provides the quantitative risk picture that the Significance Determination Process relies on to judge how much risk a given finding adds to the plant. By translating the issue into a numerical contribution to core damage or large early release risk, analysts can compare the incremental risk against predefined thresholds to decide how significant the finding is. This makes the SDP efficient and consistent: some findings can be screened with simpler criteria, but when a finding’s risk impact needs explicit assessment, PRA (or a simplified PRA) supplies the objective measure of risk significance. If the incremental risk is small, the finding may be categorized as not significant or of lower significance; if it’s large, it triggers higher significance determinations.

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