United States Nuclear Regulatory Commission - Protecting People and the Environment

Seismic Reevaluations (ARCHIVED)

Note: This is an archived web page. For the most up-to-date information, see the new Post-Fukushima Safety Enhancements page.

Seismic Reevaluations Operating reactor sites are using present-day information to reevaluate the earthquake effects—or hazards—that could impact their site.  These newly reevaluated hazards, if worse than what the plant had originally calculated, will be analyzed to determine if plant structures, systems, and/or components need to be updated to protect against the new hazard.  The NRC will review each step in the analysis process and take action to require plant changes as necessary.

Process Overview

Related Documents:

For plant-specific documents, visit our Plant-Specific Japan Lessons-Learned Activities page.

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Page Last Reviewed/Updated Friday, January 04, 2019