Eight years after the Fukushima nuclear meltdown, radioactive particles collected from the site are undergoing new forensic investigation in Britain in an effort to understand the exact sequence of events.

A 9.0 magnitude earthquake struck on March 11, 2011, off the Japanese coast, triggering tsunami that killed some 18,000 people and the world's worst nuclear disaster since Chernobyl in 1986. Meltdowns at three of the Fukushima No. 1 plant's six reactors spewed radiation into the air, soil and ocean, forcing over 100,000 residents to flee. Many have still not returned.

The Japan Atomic Energy Agency is currently collaborating with British researchers to learn more about the state of the radioactive particles created by the meltdown.