http://pissinontheroses.blogspot.com/2012/01/weaponized-fukushima-fallout.html

(c) 2012 www.POTRBLOG.com

The
improvised use of salt water to cool the Fukushima reactors and spent
fuel pools resulted in the weaponization of Uranium fallout via the
formation of Fullerenes and Endofullerenes. The term weaponization is
based on our belief that this process significantly improved
Probability of Kill (PK) values from a survivability / vulnerability
analytical standpoint.

See http://pissinontheroses.blogspot.com/2012/01/weaponized-fukushima-fallout.html for updates and further details