United States Nuclear Regulatory Commission - Protecting People and the Environment
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Japan Lessons Learned

On March 11, 2011, a 9.0-magnitude earthquake struck Japan and was followed by a 45-foot tsunami, resulting in extensive damage to the nuclear power reactors at the Fukushima Dai-ichi facility. The NRC has taken significant action to enhance the safety of reactors in the United States based on the lessons learned from this accident. This page is intended to serve as a navigation hub to follow the NRC's progress in implementing the many different lessons-learned activities.

Fukushima Water Contamination - Impacts on the U.S. West Coast (Updated January 2015)

A comparison of U.S. and Japanese regulatory requirements in effect at the time of the Fukushima accident (December 6, 2013)

Integrated Regulatory Review Service (IRRS) Follow-up and Post-Fukushima Mission (February 11, 2014)

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What are the Lessons Learned?

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Implementation Status

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Hardened Vents and Filtration

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Spent Fuel Pool Instrumentation

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Seismic Reevaluations

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Mitigation of
Events Rulemaking

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Regulatory Framework

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Reference Library

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Page Last Reviewed/Updated Wednesday, January 28, 2015