Busby: 'Can't seal Fukushima like Chernobyl - it all goes into sea'

There is release of Plutonium into the air. The Japanese Nuclear Industry has covered up the severity of the damage to humans on their failure to control the reactors. Fissioning is still taking place and very high levels of radiation are being emitted. US has detected Pu and Uranium in Hawaii!
Japanese BWR are capable of producing more Pu than the amount they use. Spent fuel rods meant for reprocessing were left at the plant.
These are more dangerous as they age because the Pu gets converted into Americium and these radioactive elements cause more dangerous Pu isotopes to be produced which may then become more fissile as they may form a nuclear chain reaction to proceed which may result in a catastrophic explosion.
See what Arnie Gundersen(Nuclear Engineer) says in the video below as the signatures of the explosions at Fukushima are different.
Gundersen Postulates Unit 3 Explosion May Have Been Prompt Criticality in Fuel Pool from Fairewinds Associates on Vimeo.