Reuters has reported that 20 nuclear reactors are in danger. See complete list

From south to north Beyond Nuclear recommends that the following reactors be shut down:

• Turkey Point Units 3 and 4 near Miami, FL
• St. Lucie Units 1 and 2 on Florida’s central Atlantic coast
• Brunswick Units 1 and 2 in North Carolina
• Calvert Cliffs Units 1 and 2 on the Chesapeake Bay in Maryland
• Salem Units 1 and 2, as well as Hope Creek, located just off the Delaware Bay
• Hope Creek, located just off the Delaware Bay
• Oyster Creek, New Jersey
• Millstone Units 2 and 3 on Long Island Sound in Connecticut
• Pilgrim in Massachusetts
• Seabrook in New Hampshire

In addition many other reactors, just inland, are also at risk from Hurricane Irene. The electrical grid could be damaged by high winds, this could force nuclear power plants onto emergency generators, known to have a high failure rate.