Fukushima Daiichi Power Plant in Japan.
(photo credit: REUTERS/DigitalGlobe/Handout)
Japan has raised the incident level at a disaster-hit nuclear power reactor, the UN nuclear watchdog reported on a monitoring website on Friday.
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The entry gave the accident at the Fukushima Daiichi site a level 5 rating, up from level 4 previously on a 1-7 scale. That would suggest a level of seriousness on par with the Three Mile Island accident in the United States in 1979.
The crisis at the nuclear power plant is "grave
", Yukiya Amano, head of the UN's nuclear watchdog, said on
Friday. He went on to say that Japan is racing against the clock to cool
overheating nuclear reactors
returned to his native Japan and said he will not visit the plant, but
that a team of scientists will go in its general direction.
Japanese engineers toiled frantically to avert a catastrophic release of
radiation from a crippled nuclear power plant north of Tokyo on Friday,
but the United States said it could take weeks to cool the facility's
overheating fuel rods.
Officials said they hoped to fix a power
cable to at least two of the six reactors in the hope of restarting
water pumps and were preparing to douse them in the afternoon with water
from fire trucks.
However, no one was holding out hope that the crisis -- about to enter
its second week after last Friday's 9.0-magnitude earthquake and tsunami
-- could be overcome anytime soon.
Japan's nuclear agency spokesman conceded that a "Chernobyl solution" of
burying the reactors in sand and concrete was in the back of the
Millions in Tokyo remained indoors on Friday, fearing a blast of
radioactive material from the complex 240 km (150 miles) to the north,
though prevailing winds would likely carry contaminated smoke or steam
away from the densely populated city to dissipate over the Pacific
Japan's nuclear disaster, the world's worst since Chernobyl in Ukraine
25 years ago, has triggered alarm and reviews of safety at atomic power
plants around the globe.Cooling pumps may not work
Even if the engineers manage to connect the power at the Fukushima
Daiichi plant, it is not clear the pumps will work as they may have been
damaged in the earthquake or subsequent explosions and there are real
fears of the electricity shorting and causing another explosion.
Nuclear agency spokesman Hidehiko Nishiyama said it was unclear how
effective spraying water on the reactors from helicopters had been on
Thursday, but the priority now was to get water into the spent-fuel
"We have to reduce the heat somehow and may use seawater," he told a
news conference. "We need to get the reactors back online as soon as
possible and that's why we're trying to restore power to them."
Jaczko said the cooling pool for spent-fuel rods at the complex's reactor No.4 may have run dry and another was leaking.