new report (PDF) from the Nuclear Proliferation Prevention Project at the University of Texas at Austin.
all 107 commercial nuclear power reactors were thought to be vulnerable, the report spotlighted 11 that were most at risk. That included eight reactors that were deemed unprotected from attacks from the sea: Diablo Canyon in California, St. Lucie in Florida, Brunswick in North Carolina, Surry in Virginia, Indian Point in New York, Millstone in Connecticut, Pilgrim in Massachusetts, and the South Texas Project.
Three civilian reactors fueled with bomb-grade uranium were also deemed particularly vulnerable. They are housed at the University of Missouri in Columbia, the Massachusetts Institute of Technology in Cambridge, and the National Institute of Standards and Technology - which is within 25 miles of the White House. Unlike military facilities that hold bomb-grade uranium, the report found, these facilities are not sufficiently defended against a credible terrorist threat.
This is the apparent PDF file which the article is speaking: http://blogs.utexas.edu/nppp/files/2013/08/NPPP-working-paper-1-2013-Aug-15.pdf