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Fukushima Response Strategy

Hamilton and Rhea Counties, Tennessee and Limestone County, Alabama

On March 15, 2013, TVA issued a final environmental assessment and finding of no signifcant impact for implementing its response strategy for recent Nuclear Regulatory Commission (NRC) requirements following the March 2011 earthquake and tsunami that struck the Fukushima Dai-ichi electrical power station in Japan.  The Nuclear Regulatory Commission directed operators of nuclear power plants, including the Tennessee Valley Authority (TVA), to review their procedures, equipment, and facilities and to develop strategies to improve their ability to maintain or restore core cooling, containment, and spent fuel pool cooling capabilities in the event of a severe accident.

TVA has proposed a strategy for addressing these issues at its Watts Bar Nuclear Plant (WBN), Sequoyah Nuclear Plant (SQN), and Browns Ferry Nuclear Plant (BFN).  Components of the strategy include evaluating current procedures and facilities and undertaking the following physical actions:

  • Replace certain transformers at SQN.
  • Construct concrete equipment storage buildings at BFN, SQN, and WBN to house large emergency generators and other emergency equipment and supplies.
  • Install as many as three 225-kVA diesel generators on the roofs of existing buildings at BFN, SQN, and WBN.
  • Harden the condensate storage tanks and associated equipment at SQN and WBN by constructing a concrete or metal housing around the condensate storage tanks, constructing new tanks with a more robust design, or implementing other mitigating measures to ensure reactor pressure vessel cooling water is available.
  • Conduct general construction-type activities, including soil-disturbing actions, for minor upgrades to existing systems.
  • Modify the vent system at BFN and install filters in the vents.
  • At BFN, provide a remote station for a pneumatic supply to allow manual operation of the vent system from a safe location and modify the effluent radiation monitor to ensure prolonged operation or install a new monitoring system with an uninterruptible power source.


PDF files require Adobe Acrobat Reader.

Finding of No Significant Impact (PDF, 804 kb)

Final Environmental Assessment (PDF, 2.4 mb)


For more information or to request an electronic or printed copy of any of the documents, contact:

James F. Williamson, Senior NEPA Specialist
Tennessee Valley Authority
400 West Summit Hill Drive, WT 11D
Knoxville, Tennessee 37902


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