Assessing the need for an update of a probabilistic seismic hazard analysis using a SSHAC Level 1 study and the Seismic Hazard Periodic Reevaluation Methodology

•Introduces the risk-informed Seismic Hazard Periodic Reevaluation Methodology.•A new method to assess the need for updating a probabilistic seismic hazard analysis.•Considers changes in seismic hazard and engineering-based risk information.•Offers a defensible and documented approach for existing nuclear facilities.•Employs SSHAC Level 1 or 2 study as part of the decision-making process.