The shutdown was not as smooth as was first reported, and the majority of the emergency evacuation sirens in the area were not operational.
The Browns Ferry is identical in design to Fukushima unit 3.
http://www.nrc.gov/reading-rm/doc-collections/event-status/event/2011/20110428en.html#en46793
Since the shutdown, there have been further problems:
http://www.citizen-times.com/article/DN/20110516/NEWS11/110516015/TVA-reactor-loses-cooling-80-minutes-NRC-report?odyssey=nav|head