Kelesh mo wagt esh3a3aaaat o Nuk's disasters :(
allah yaster !
A large explosion was seen at the plant with debris blown out from the building
Japanese technicians are battling to lower the pressure in a second nuclear reactor at Japan's earthquake-damaged Fukushima power station, which was hit by a big explosion on Saturday.
The Japanese government has sought to play down fears of a radiation leak at the Fukushima plant.
But the plant's Tokyo Electric Power (Tepco) said radiation levels around the plant had now risen above permissible limits.
And government spokesman Yukio Edano acknowledged it was possible that a meltdown had occurred at reactor 3.
The BBC's Chris Hogg in Tokyo says a meltdown at reactor 3 would be potentially more serious than at the other reactors, because it is fuelled by plutonium and uranium, unlike the other units which carry only uranium.
Experts say as long as the authorities can keep the fuel rods in the core covered with water, they should be able to avoid a major disaster.
Emergency workers were pumping in seawater in a bid to keep the rods cool, but one report suggested the tops of the rods had briefly been exposed.
Technicians opened valves at reactor 3, allowing small amounts of radioactive vapour to escape in a bid to reduce the pressure in the unit.
They performed a similar operation on the first reactor at Fukushima 1, hours before the explosion that wrecked the building it was housed in.
The Japanese government doubled the size of the evacuation zone around Fukushima 1 to 20km (12.4 miles) after the blast.
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