Sensible informed writing unlike the hysteria found elsewhere:
Unlike the BBC's Richard Black
"This opens the possibility of a serious meltdown - where molten, highly radioactive reactor core falls through the floor of the containment vessel and into the ground underneath."
Ain't gonna happen, the primary reaction was switched off days ago and the activity in the core is residual heating caused by decay secondary radioactive material, and a small fraction of the normal thermal output
Read this from the IAEA befor eyou believe the scare stories from the BBC and the Guardian.