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Staff pull out of plant as radiation levels climb

©

Text by NEWS WIRES

Latest update : 2011-03-16

Rising radiation forced emergency workers to withdraw from the nuclear plant where they had been desperately battling to cool the overheating reactors Wednesday, Japan's Chief Cabinet Secretary said.

AP - Japan ordered emergency workers to withdraw from its stricken nuclear complex Wednesday amid a surge in radiation, temporarily suspending efforts to cool the overheating reactors. Hours later, officials said they were preparing to send the team back in.

Chief Cabinet Secretary Yukio Edano said the workers, who had been dousing the reactors with seawater in a frantic effort to stabilize their temperatures, had no choice but to pull back from the most dangerous areas.

“The workers cannot carry out even minimal work at the plant now,” he said Wednesday morning, as smoke billowed above the crippled Fukushima Dai-ichi nuclear complex. “Because of the radiation risk we are on standby.”

Later, an official with Tokyo Electric Power, which operates the plant, said the team had withdrawn about 500 yards (meters) from the complex, but were getting ready to go back in.

The nuclear crisis has triggered international alarm and partly overshadowed the human tragedy caused by Friday’s 9.0-magnitude earthquake and the subsequent tsunami, a blast of black seawater that pulverized Japan’s northeastern coastline. The quake was one of the strongest recorded in history.

Later Wednesday, national broadcaster NHK showed military helicopters lifting off to survey radiation levels above the complex, preparing to dump water onto the most troubled reactors in a desperate effort to cool them down.

But Edano has already warned that may not work.

“It’s not so simple that everything will be resolved by pouring in water.

We are trying to avoid creating other problems,” he said.

“We are actually supplying water from the ground, but supplying water from above involves pumping lots of water and that involves risk. We also have to consider the safety of the helicopters above,” he said.

Radiation levels had gone down by later Wednesday, but it was not immediately clear if the workers had been allowed back in, or how far away they had withdrawn. The workers at the forefront of the fight _ a core team of about 180 _ had been regularly rotated in and out of the danger zone to minimize their radiation exposure.

Meanwhile, officials in Ibaraki prefecture, just south of Fukushima, said radiation levels were about 300 times normal levels by late morning. While those levels are unhealthy for prolonged periods, they are far from fatal.

Days after Friday’s twin disasters, millions of people were struggling along the coast with little food, water or heat, and already chilly temperatures turned to snow in many areas. Up to 450,000 people are staying in temporary shelters, often sleeping on the floor of school gymnasiums.

More than 11,000 people are officially listed as dead or missing, and most officials believe the final death toll will be well over 10,000 people.

In an extremely rare address to the nation, Emperor Akihito expressed his condolences and urged Japan not to give up.

“It is important that each of us shares the difficult days that lie ahead,” said Akihito, 77, a figure deeply respected across the country. “I pray that we will all take care of each other and overcome this tragedy.”

He also expressed his worries over the nuclear crisis, saying: “With the help of those involved I hope things will not get worse.”

Since the quake and wave hit, authorities have been struggling to avert an environmental catastrophe at the Fukushima Dai-ichi complex, 140 miles (220 kilometers) north of Tokyo. The tsunami knocked out the backup diesel generators needed to keep nuclear fuel cool, setting off the atomic crisis.

In the city of Fukushima, about 40 miles (60 kilometers) inland from the nuclear complex, hundreds of harried government workers, police officers and others struggled to stay on top of the situation in a makeshift command center.

An entire floor of one of the prefecture’s office buildings had been taken over by people tracking evacuations, power needs, death tolls and food supplies.

In one room, uniformed soldiers evaluated radiation readings on maps posted across a wall. In another, senior officials were in meetings throughout the day, while nuclear power industry representatives held impromptu briefings before rows of media cameras.

Wednesday’s radiation spike was apparently the result of a release of pressure that had built up in the complex’s Unit 2 reactor, officials said. Steam and pressure build up in the reactors as workers try to cool the fuel rods, leading to controlled pressure releases through vents _ as well as uncontrolled explosions.

John Price, an Australia-based nuclear safety expert, said he was surprised by how little information the Japanese were sharing.

“We don’t know even the fundamentals of what’s happening, what’s wrong, what isn’t working. We’re all guessing,” he said. “I would have thought they would put on a panel of experts every two hours.”

Given the radiation levels, he saw few health risks for the general public so far, though he was concerned for the workers, who he said were almost certainly working in full body suits and breathing through respirators.

Edano said the government expects to ask the U.S. military for help, though he did not elaborate. He said the government is still considering whether to accept offers of help from other countries.

The government has ordered some 140,000 people in the vicinity to stay indoors. A little radiation was also detected in Tokyo, triggering panic buying of food and water.

There are six reactors at the plant. Units 1, 2 and 3, which were operating last week, shut down automatically when the quake hit. Since then, all three have been rocked by explosions. Compounding the problems, on Tuesday a fire broke out in Unit 4’s fuel storage pond, an area where used nuclear fuel is kept cool, causing radioactivity to be released into the atmosphere.

Units 4, 5 and 6 were shut at the time of the quake, but even offline reactors have nuclear fuel _ either inside the reactors or in storage ponds _ that need to be kept cool.

Meanwhile, the Nuclear and Industrial Safety Agency estimated that 70 percent of the rods have been damaged at the No. 1 reactor.

Japan’s national news agency, Kyodo, said that 33 percent of the fuel rods at the No. 2 reactor were damaged and that the cores of both reactors were believed to have partially melted.

“We don’t know the nature of the damage,” said Minoru Ohgoda, spokesman for the country’s nuclear safety agency. “It could be either melting, or there might be some holes in them.”

Meanwhile, the outer housing of the containment vessel at the No. 4 unit erupted in flames early Wednesday, said Hajimi Motujuku, a spokesman for the plant’s operator, Tokyo Electric Power Co.

Japan’s nuclear safety agency said fire and smoke could no longer be seen at Unit 4, but that it was unable to confirm that the blaze had been put out.

 

 

 

Date created : 2011-03-16

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