News : Japanese engineers race against time

Tokyo - Japanese engineers worked through the night to restore a power cable to a crippled nuclear power plant in the hope of restarting pumps desperately needed to pour cold water on overheating fuel rods and avert a catastrophe.


Officials could not say when the cable might be connected, but said work would stop on Friday morning to allow helicopters and fire trucks to resume pouring water on the Daiichi plant, about 240km north of Tokyo.
“Preparatory work has so far not progressed as fast as we had hoped,” an official of plant operator Tokyo Electric Power Company (TEPCO) told a news briefing, adding that a cold snap was hampering the effort.
Washington and other foreign capitals have expressed growing alarm about radiation leaking from the plant, severely damaged by a magnitude 9.0 earthquake and tsunami a week ago that triggered a series of destructive explosions which compromised the nuclear reactors and spent fuel storage tanks.
Yukiya Amano, head of the Vienna-based International Atomic Energy Agency (IAEA), was due back in his homeland later on Friday with an international team of experts after earlier complaining about a lack of information from Japanese authorities on the crisis.
Graham Andrew, his senior aide, said the situation at the plant was serious but “reasonably stable”.
“It hasn't got worse, which is positive,” he said. “The situation remains very serious but there has been no significant worsening since yesterday.”
Even if TEPCO manages to connect the power, it is not clear the pumps will work as they may have been damaged by the natural disaster or subsequent explosions. Work has been slowed by the need to frequently monitor radiation levels to protect workers.
US officials took pains not to criticise Japan's government, but Washington's actions indicated a divide with its close ally about the perilousness of the world's worst nuclear accident since the Chernobyl disaster in 1986.
President Barack Obama making an unannounced visit to the Japanese embassy in Washington on Thursday to sign a condolence book, said the United States feels “great urgency” to assist Japan and was confident the country would rebuild.
The top US nuclear regulator said the cooling pool for spent fuel rods at the complex's reactor No.4 may have run dry and another was leaking.
Gregory Jaczko, head of the US Nuclear Regulatory Commission, told a congressional hearing that radiation levels around the cooling pool were extremely high, posing deadly risks for workers still toiling in the wreckage of the power plant.
“It would be very difficult for emergency workers to get near the reactors. The doses they could experience would potentially be lethal doses in a very short period of time,” he said in Washington.
Japan's nuclear agency said it could not confirm if water was covering the fuel rods. The plant operator said it believed the reactor spent-fuel pool still had water as of Wednesday, and made clear its priority was the spent-fuel pool at the No.3 reactor.
On Thursday, military helicopters dumped about 30 tons of water, all aimed at this reactor. One emergency crew temporarily put off spraying the same reactor with a water cannon due to high radiation, broadcaster NHK said, but another crew later began hosing it.
Latest images from the plant showed severe damage, with two of the buildings a twisted mangle of steel and concrete.
“The worst-case scenario doesn't bear mentioning and the best-case scenario keeps getting worse,” Perpetual Investments said in a note on the crisis. - Reuters

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