Radioactive Tritium Has Leaked From Three-Quarters Of U.S. Nuclear Plants: AP Investigation

This is nothing new and has been going on for years.  Tritium is EXTREMELY mobile and hard to contain.  I read a study once about tritium being detected in the blood of subjects who wore diving watches that had tiny little glass tubes on the watch hands with tritium in them so they would glow and could be seen in the dark.  Tritium leaked out of the sealed glass tubes, out of the sealed diving watches, and diffused across the skin of the experimental subjects wearing the watches, THAT's how mobile it is.  So we shouldn't be surprised to see it showing up in groundwater under and near nuke plants, just another reason why nuclear energy is so irresponsible and even criminal in its intent. 

http://www.huffingtonpost.com/2011/06/21/radioactive-tritium-leaks-us-nuclear-plants_n_881090.html