United States Nuclear Regulatory Commission - Protecting People and the Environment
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Plant Walkdowns of Seismic and Flooding Protection Features

Plant Walkdowns, consisting of a round image with an artist's rendering of a man walking down stairs In light of the effects from the extreme earthquake and tsunami of March 11, 2011, on the nuclear power plants at Fukushima, the NRC concluded U.S. nuclear power plants needed to reaffirm their existing ability to resist quakes and flooding.  On March 12, 2012, the NRC asked U.S. nuclear power plants to perform a detailed inspection, or "walkdown," of their currently installed seismic and flooding protection features. The plants had to ensure the features met current requirements, and also identify, correct, and report any degraded conditions.  The plants completed their walkdowns by November 2012; NRC inspectors have done follow-up inspections and the agency has issued plant-specific assessments of the licensee's walkdown reports.

Related Documents:

Process Overview – Seismic Walkdowns

Seismic Walkdowns

Process Overview - Flooding Walkdowns

Flooding Walkdowns

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

Page Last Reviewed/Updated Friday, April 15, 2016