We all know this is very bad for the planet.Something to watch in the next few months is as the fuel rods are removed from Unit 4,Tepco is saving the toughest for last.I dont recall what year it happened but they got a rod stuck in the pool pre tsunami.
Apparently as they tried to remove it Tepco bent the handle badly and soon they will have to deal with it and two other damaged rods.I read the casings were damaged to some extent as well.
Heres a Tepco doc that documents the issue.If interested,use google translate to read...

[link to www.tepco.co.jp]