TEPCO reported at a gathering of the Nuclear Regulation Authority on the twenty fourth that there was a excessive risk that there was a gap within the backside of the Fukushima Daiichi Nuclear Power Station Unit 1 reactor that precipitated the meltdown. It is believed to have been broken by the warmth of melted nuclear gasoline particles, which helps the assumptions made thus far.
Source
“Fukushima Daiichi Nuclear Power Plant Unit 1 There is a high possibility of a hole in the bottom of the reactor” TEPCO | NHK
