Previously, the firm had said that only some of the fuel had burned through its inner pressure vessel and dropped into the containment vessel.
"Almost no fuel remains at its original position," Tepco said. The simulation shows that the fuel may have penetrated the concrete floor by up to 65cm, just 37cm from the reactor's outer steel wall.
Tepco said that about 60% of the fuel in the two other reactors that experienced meltdown had dropped onto the concrete base, but had caused less damage.
Fukushima fuel rods may have completely melted | World news | guardian.co.uk
"Decommissioning will take 30 years" and where will the decommissioned waste from Daiichi 1, 2, and 4 actually go? And what about the water being contaminated on a daily basis? Is the ocean that large to contain it? Does it seem like all these Nuclear "geniuses" designing, planning, organizing, constructing and operating either have a screw loose or can't recognize human fallibility? Do any nuclear plants have a fail safe cooling system like an uphill lake, biomass steam generated power supply to pump coolant, or what? If huge solar flares cause power failures on a National level, what is the backup? If EMP device is detonated, what is the backup? Is insanity endemic in the Nuclear Industry?