NNN World News out of Japan reports that it appears the plant operator did not follow the emergency directions for managing the Fukushima nuclear crisis and did not vent in time to prevent an explosion.
And in other news? Yes, TEPCO finally confirms partial meltdowns in No. 3 and 3 reactors:
Tokyo Electric Power (Tepco) has confirmed that there have been extra partial meltdowns in fuel rods at its damaged Fukushima nuclear power plant.
The company said that the fuel rods are in its Number 2 and Number 3 reactors.
Tepco has been trying to contain radiation that started leaking from the plant when it was hit by the 11 March earthquake and tsunami.
The company said that it planned to stick to its timetable of getting the plant under control by January.
Tepco had said earlier that rods at its Number 1 reactor had also melted down. It was thought that a similar problem had occured in the other reactors but it was difficult to confirm.
"Based on our analysis, we have reached the conclusion that a certain amount of nuclear fuel has melted down," Ken Matsuda, a Tepco spokesman told the BBC.
The company has been trying to cool the reactors and get the unstable fuel rods back under control.
Last week, the president of Tepco, Masataka Shimizu, resigned. He will be replaced by managing director Toshio Nishizawa.