Precursor Analyses - The Use of Deterministic and PSA Based Methods in the Event Investigation Process at Nuclear Power Plants

Outlines the methodology used for evaluation of the safety significance of unusual events in nuclear power plants. The publication describes a synergistic process that makes more effective use of operating experience event information by combining knowledge from traditional deterministic root cause event investigation and PSA based event analysis.

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This publication outlines the methodology that is used for evaluation of the safety significance of unusual events in nuclear power plants. It describes a synergistic process that makes more effective use of operating experience event information by combining the insights and knowledge gained from two approaches, traditional deterministic root cause event investigation and PSA based event analysis. The precursor analysis described in this publication enables better determination of the safety significance of event so that adequate corrective measures can be better planned and utilized.