Radioactivity of pool components down 95% since 1999

According to a recent survey of the radioactive components stored in the reactor pool at the Oak Ridge Research Reactor, the rad levels have dropped by 95 percent since the last survey was conducted in 1999.
http://knoxblogs.com/atomiccity/2014/10/05/radioactivity-pool-components-95-since-1999/#more-30524