Showing posts with label Japan Nuclear plant. Show all posts
Showing posts with label Japan Nuclear plant. Show all posts

Thursday, April 21, 2011

Japan declares no-go zone around nuclear plant

FUTABA, Japan (AP) — Residents rushed back into the 12-mile (20-kilometer) evacuation zone around Japan's radiation-spewing nuclear power plant Thursday, grabbing whatever belongings they could before an order went into effect legally banning entry to the area.
A man wearing a protective suit walks along a street in deserted town of Futaba, inside the 20-kilometer (12-mile) evacuation zone, in Fukushima Prefecture, Japan, Thursday, April 21, 2011. Japan declared the 20-kilometer (12-mile) area evacuated around its radiation-spewing nuclear power plant a no-go zone on Thursday, urging residents to abide by the order for their own safety or possibly face fines or detention. (AP Photo/Sergey Ponomarev)

A stream of evacuees ventured into deserted towns near the plant, some in white protective suits and others in face masks and rain gear they hoped would protect against radiation. Most raced through the zone with car windows closed, their vehicles crammed with clothing and valuables.
"This is our last chance, but we aren't going to stay long. We are just getting what we need and getting out," said Kiyoshi Kitajima, an X-ray technician, who dashed to his hospital in Futaba, a town next-door to the plant, to collect equipment before the order went into effect at midnight.
Officials said the order announced Thursday was meant to limit exposure to radiation leaking from the plant and to prevent thefts. Almost all the zone's nearly 80,000 residents left when the area was evacuated on March 12, but police had not been able to legally block them from going back.
Police had no estimate Thursday of the exact number of people who have returned to the zone or who still might be living there.
Under a special nuclear emergency law, people who enter the zone will now be subject to fines of up to 100,000 yen ($1,200) or possible detention of up to 30 days. Up to now, defiance of the evacuation order was not punishable by law.
The order angered some residents who fled their homes nearly empty-handed when they were told to evacuate after last month's tsunami and earthquake wrecked the Fukushima Dai-ichi plant's power and cooling systems.
"I initially thought we would be able to return within a few days. So I brought nothing except a bank card," said Kazuko Suzuki, 49, also from Futaba.
"I really want to go back. I want to check if our house is still there," said Suzuki, who fled with her teenage son and daughter. "My patience has run out. I just want to go home."
The no-go order was not due to any particular change in conditions inside the plant, which appear to have somewhat stabilized. Even under the best-case scenario, however, the plant's operator says it will take at least six months to bring its reactors safely into a cold shutdown.
Chief Cabinet Secretary Yukio Edano said authorities would arrange brief visits, allowing one person per household to return by bus for a maximum of two hours to collect necessary belongings. Participants would have to go through radiation screening, he said.
"We beg the understanding of residents. We really want residents not to enter the areas," Edano told reporters. "Unfortunately, there are still some people in the areas."
Residents chafed at the limit to just one person per household.
No visits will be allowed in a two mile (three kilometer) area closest to the plant, said Hidehiko Nishiyama of Japan's Nuclear and Industrial Safety Agency, confirming reports that zone would be completely off-limits.
Details were still being worked out.
Katsunobu Sakurai, mayor of Minami Soma, where about half the 71,000 residents lived in areas that will now be off-limits, questioned the rationale for the way the evacuation zone was decided.
"It feels like some outsider who doesn't know anything about our geography sat at a desk and drew these circles," Sakurai said. "The zones have zero scientific basis. Radiation doesn't travel in neat circles. Just putting up circles around the plant is unreasonable."
Prime Minister Naoto Kan, who has been under fire from the opposition over the government's handling of the crisis, visited the region Thursday, giving a giving a pep talk to workers at a nuclear crisis management center in Fukushima.
Fukushima's governor, who has also been critical of the government's performance, said he urged Kan to ensure the government properly handles the disaster and related compensation issues.
"I told the prime minister that I strongly hope that evacuees can return home as early as possible," said the governor, Yuhei Sato.
Meanwhile, new data from Japan's National Police Agency showed that two-thirds of the victims identified in last month's earthquake and tsunami were elderly — and almost all of them drowned.
The agency said 65 percent of the 11,108 confirmed fatalities of known age were 60 or older. Another 1,899 victims were of unknown age.
Adding those who are still missing, the earthquake and resulting tsunami killed an estimated 27,500 people. The police agency said nearly 93 percent of the victims had drowned. Others perished in fires, were crushed to death or died from other causes.
The northeastern coast hardest hit by the disasters had a high concentration of elderly residents.

Copyright 2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.


Monday, April 4, 2011

Search for radiation leak turns desperate in Japan

TOKYO (AP) — Workers used a milky bathwater dye Monday as they frantically tried to trace the path of radioactive water seeping into the ocean from Japan's tsunami-damaged nuclear plant.
An employee of an auto maker watches vehicles damaged by tsunami in Sendai, northeastern Japan, Monday, April 4, 2011. The March 11 earthquake off Japan's northeast coast triggered a tsunami that barreled onshore and disabled the Fukushima Dai-ichi nuclear power plant. (AP Photo/Kyodo News) JAPAN OUT, MANDATORY CREDIT, NO LICENSING IN CHINA, HONG KONG, JAPAN, SOUTH KOREA AND FRANCE
The crack in a maintenance pit discovered over the weekend was the latest confirmation that radioactivity continues to spill into the environment. The leak is a symptom of the primary difficulty at the Fukushima Dai-ichi complex: Radioactive water is pooling around the plant and preventing workers from powering up cooling systems needed to stabilize dangerously vulnerable fuel rods.



The plant operators also deliberately dumped 10,000 tons of tainted water — measuring about 500 times above the legal limit for radiactivity — into the ocean Monday to make space at a storage site for water that is even more highly radiactive.
Engineers have turned to a host of improvised and sometimes bizarre methods to tame the nuclear plant after it was crippled in Japan's magnitude 9.0 quake and tsunami on March 11.
Efforts over the weekend to clog the leak with a special polymer, sawdust and even shredded newspapers failed to halt the flow at a cracked concrete maintenance pit near the shoreline. The water in that leak contains radioactive iodine at rates 10,000 times the legal limit.
Suspecting they might be targeting the wrong channel to the pit, workers tried to confirm the leak's pathway by dumping several pounds (kilograms) of salts used to give bathwater a milky hue into the system, plant operator Tokyo Electric Power Co. said Monday.
"There could be other possible passages that the water may be traveling. We must watch carefully and contain it as quickly as possible," said Hidehiko Nishiyama, a spokesman for the Nuclear Safety and Industrial Agency.
Radioactive water has pooled throughout the plant because the operator has been forced to rely on makeshift ways of pumping water into the reactors — and allowing it to gush out wherever it can — to bring down temperatures and pressure in the cores.
Government officials conceded Sunday that it will likely be several months before the cooling systems are completely restored. And even after that happens, there will be years of work ahead to clean up the area around the complex and figure out what to do with it.
The makeshift system makes it difficult to contain the radiation leaks, but it is aimed a preventing fuel rods from going into a full meltdown that would release even more radiactivity into the environment.
"We must keep putting water into the reactors to cool to prevent further fuel damage, even though we know that there is a side effect, which is the leakage," Nishiyama said. "We want to get rid of the stagnant water and decontaminate the place so that we can return to our primary task to restore the sustainable cooling capacity as quickly as possible."
To that end, the plant's operator, Tokyo Electric Power Co., said it jettisoned the 10,000 tons of water Monday, clearing space in a waste-storage facility. The government decided to allow the step as "an unavoidable emergency measure," Chief Cabinet Secretary Yukio Edano said.
An additional 1,500 tons will be dumped from a trench under the plant's units 5 and 6. That water is threatening to interfere with the workings at those units, whose reactors are under control.
Radioactivity is quickly diluted in the ocean, and Edano said the dump should not affect the safety of seafood in the area.
The crisis has unfolded as Japan deals with the aftermath of twin natural disasters that decimated large swaths of its northeastern coast. Up to 25,000 people are believed to have died in the disaster, and tens of thousands lost their homes. Thousands more were forced to flee a 12-mile (20-kilometer) radius around the plant because of the radiation.
The 8-inch-long (20-centimeter-long) crack was discovered in the maintenance pit over the weekend. It is sending radioactive water into area that is normally blocked off by a seawall, but a crack was also discovered in that outer barrier Monday.
Though it later authorized the dumping of slightly radioactive water, the government said Monday it was growing concerned about the sheer volume of contaminated materials spilling into the Pacific. It is not clear how much water has leaked from the pit so far.
"Even if they say the contamination will be diluted in the ocean, the longer this continues, the more radioactive particles will be released and the greater the impact on the ocean," Edano said. "We are strongly urging TEPCO that they have to take immediate action to deal with this."
The crisis has sparked protests in Japan and raised questions around the world about the safety of nuclear power. The head of the International Atomic Energy Agency told delegates at a nuclear safety conference Monday that the industry cannot afford to ignore these concerns.
"We cannot take a 'business as usual' approach," Yukiya Amano said.
The operator said Monday it is ordering fencing that is typically used to contain oil spills. The screens are not designed to trap radioactivity but might curtail the flow of water and thus reduce the spread of contamination, said TEPCO manager Teruaki Kobayashi. It was not clear when they would arrive.
All of the plant's reactors were designed by General Electric, and the company's CEO met Sunday with TEPCO's chairman. Jeffrey Immelt told reporters Monday that more than 1,000 engineers from GE and its partner Hitachi are helping to analyze the problems at the plant.
Immelt also offered assistance in dealing with the electricity shortage brought on by damage to Dai-ichi and other power plants. Japan is expecting a shortfall of at least 10 million kilowatts come summer.
Gas turbines are on their way from the U.S. with both long- and short-term capabilities, Immelt said.

Copyright 2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.


Wednesday, March 30, 2011

Setbacks mount in Japan at leaking nuclear plant

TOKYO (AP) — Setbacks mounted Wednesday in the crisis over Japan's tsunami-damaged nuclear facility, with nearby seawater testing at its highest radiation levels yet and the president of the plant operator checking into a hospital with hypertension.
Nearly three weeks after a March 11 earthquake and tsunami slammed and engulfed the Fukushima Dai-ichi plant, knocking out cooling systems that keeps nuclear fuel rods from overheating, Tokyo Electric Power Co. is still struggling to bring the facility in northeastern Japan under control.
The country's revered Emperor Akihito and Empress Michiko reached out to some of the thousands displaced by the twin disasters — which have killed more than 11,000 people — spending about an hour consoling a group of evacuees at a Tokyo center.
ALTERNATE CROP OF TOK103 - This March 24, 2011 aerial photo taken by a small unmanned drone and released by AIR PHOTO SERVICE shows damaged Unit 4 of the crippled Fukushima Dai-ichi nuclear power plant in Okumamachi, Fukushima prefecture, northern Japan. (AP Photo/AIR PHOTO SERVICE) MANDATORY CREDIT



"I couldn't talk with them very well because I was nervous, but I felt that they were really concerned about us," said Kenji Ukito, an evacuee from a region near the plant. "I was very grateful."
At the crippled plant, leaking radiation has seeped into the soil and seawater nearby and made its way into produce, raw milk and even tap water as far as Tokyo, 140 miles (220 kilometers) to the south.
The stress of reining in Japan's worst crisis since World War II has taken its toll on TEPCO President Masataka Shimizu, who went to a hospital late Tuesday.
Shimizu, 66, has not been seen in public since a March 13 news conference in Tokyo, raising speculation that he had suffered a breakdown. For days, officials deflected questions about Shimizu's whereabouts, saying he was "resting" at company headquarters.
Spokesman Naoki Tsunoda said Wednesday that Shimizu had been admitted to a Tokyo hospital after suffering dizziness and high blood pressure.
The leadership vacuum at TEPCO — whose shares have plunged nearly 80 percent since the crisis began — comes amid growing criticism over its failure to halt the radiation leaks. Bowing deeply, arms at his side, Chairman Tsunehisa Katsumata announced at a news conference that he would step in and apologized for the delay.
"We must do everything we can to end this situation as soon as possible for the sake of everyone who has been affected," said Yuhei Sato, governor of Fukushima prefecture. "I am extremely disappointed and saddened by the suggestion that this might drag out longer."
On Wednesday, nuclear safety officials said seawater 300 yards (meters) outside the plant contained 3,355 times the legal limit for the amount of radioactive iodine — the highest rate yet and a sign that more contaminated water was making its way into the ocean.
The amount of iodine-131 found south of the plant does not pose an immediate threat to human health but was a "concern," said Hidehiko Nishiyama, a Nuclear and Industrial Safety Agency official. He said there was no fishing in the area.
Radioactive iodine is short-lived, with a half-life of just eight days, and in any case was expected to dissipate quickly in the ocean. It does not tend to accumulate in shellfish.
"We will nail down the cause, and will do our utmost to prevent it from rising further," he said.
In another setback, white smoke was spotted coming from one of the reactor buildings Wednesday evening. Firefighters responded and electricity to the unit was cut since it appeared to come from an area that houses the electrical switchboard, nuclear safety official Kazuya Aoki said. The smoke stopped within 20 minutes and no radiation was released, he said.
Highly toxic plutonium also has been detected in the soil outside the plant, TEPCO said. Safety officials said the amounts did not pose a risk to humans, but the finding supports suspicions that dangerously radioactive water is leaking from damaged nuclear fuel rods. There have been no reports of plutonium being found in seawater.
The latest findings on radioactive iodine highlighted the urgent need to power up the power plant's cooling system. Workers succeeded last week in reconnecting some parts of the plant to the power grid.
But as they pumped in water to cool the reactors and nuclear fuel, they found pools of radioactive water in the basements of several buildings and in trenches outside.
The contaminated water has been emitting many times the amount of radiation that the government considers safe for workers, making it a priority to pump the water out before electricity can be restored.
Complicating matters, the tanks storing the contaminated water are beginning to fill up. Pumping at one unit has been suspended since Tuesday night while workers scramble to drain a new tank after the first one reached capacity. And the water just kept coming Wednesday, when a new pool was found.
In another effort to reduce the spread of radioactive particles, TEPCO plans to spray resin on the ground around the plant. The company will test the method Thursday in one section of the plant before using it elsewhere, Nishiyama said.
"The idea is to glue them to the ground," he said. But it would be too sticky to use inside buildings or on sensitive equipment.
The government also is considering covering some reactors with cloth tenting, TEPCO said. If successful, that could allow workers to spend longer periods of time in other areas of the plant.
The spread of radiation has raised concerns about the safety of Japan's seafood, even though experts say the low levels suggest radiation won't accumulate in fish at unsafe levels. Trace amounts of radioactive cesium-137 have been found in anchovies as far afield as Chiba, near Tokyo, but at less than 1 percent of acceptable levels.
Experts say the Pacific is so vast that any radiation will be quickly diluted before it becomes problematic. Citing dilution, the U.S. Food and Drug Administration has played down the risks of seafood contamination.
As officials seek to bring an end to the nuclear crisis, hundreds of thousands in the northeast are trying to put their lives back together. The official death toll stood at 11,257 on Wednesday, with the final toll likely surpassing 18,000.
The government said damage is expected to cost $310 billion, making it the most costly natural disaster on record.
In the town of Rikuzentakata, one 24-year-old said she's been searching every day for a missing friend but will have to return to her job at a nursing home because she has run out of cash.
Life is far from back to normal, she said.
"Our family posted a sign in our house: Stay positive," Eri Ishikawa said. But she said it's a struggle.

Copyright 2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Sunday, March 27, 2011

Radiation inside Japan nuclear plant rises sharply

TOKYO (AP) — Emergency workers struggling to pump contaminated water from Japan's stricken nuclear complex fled one of the troubled reactors Sunday after reporting a huge spike in radioactivity, with levels 10 million times higher than normal in the reactor's cooling system, officials said.
The numbers were so high that the worker measuring radiation levels in the complex's Unit 2 withdrew before taking a second reading, officials said.

Japanese workers shovel dirt on to coffins containing victims of the March 11 earthquake and tsunami during a mass funeral in Yamamoto, northeastern Japan Saturday, March 26, 2011. (AP Photo/David Guttenfelder)
It was not immediately clear, however, how long workers were exposed to the highly radioactive water or how long the levels had been that high at the Fukushima Dai-ichi plant, 140 miles (220 kilometers) northeast of Tokyo.
But it came as officials acknowledged there was contaminated water in all four of the complex's most troubled reactors, and as airborne radiation in Unit 2 measured 1,000 millisieverts per hour — four times the limit deemed safe by the government, Tokyo Electric Power Co. spokesman Takashi Kurita said.
Officials say they still don't know where the radioactive water is coming from, though government spokesman Yukio Edano has said some is "almost certainly" seeping from a cracked reactor core in one of the units.
While the discovery of the high radiation levels — and the evacuation of workers from one reactor unit — again delayed efforts to bring the deeply troubled complex under control, Edano insisted the situation had partially stabilized.
"We have somewhat prevented the situation from turning worse," he told reporters Sunday evening. "But the prospects are not improving in a straight line and we've expected twists and turns. The contaminated water is one of them and we'll continue to repair the damage."
The discovery over the last three days of radioactive water has been a major setback in the mission to get the plant's crucial cooling systems operating more than two weeks after a massive earthquake and tsunami.
The magnitude-9 quake off Japan's northeast coast on March 11 triggered a tsunami that barreled onshore and disabled the Fukushima plant, complicating an immense humanitarian disaster.
The death toll from the twin disasters stood at 10,668 Sunday, with more than 16,574 people missing, police said. Hundreds of thousands of people are homeless.
Workers have been scrambling to remove the radioactive water from the four units and find a safe place to store it, TEPCO officials said.
On Sunday night, Minoru Ogoda of Japan's nuclear safety agency said each unit could have hundreds of tons of radioactive water.
The protracted nuclear crisis has spurred concerns about the safety of food and water in Japan, which is a prime source of seafood for some countries. Radiation has been found in food, seawater and even tap water supplies in Tokyo.
Just outside the coastal Fukushima nuclear plant, radioactivity in seawater tested about 1,250 times higher than normal last week — but that number had climbed to 1,850 times normal by the weekend.
Hidehiko Nishiyama, a nuclear safety official, said the increase was a concern, but also said the area is not a source of seafood and that the contamination posed no immediate threat to human health.
Experts with the International Atomic Energy Agency said the ocean would quickly dilute the worst contamination.
Up to 600 people are working inside the plant in shifts. Nuclear safety officials say workers' time inside the crippled units is closely monitored to minimize their exposure to radioactivity, but two workers were hospitalized Thursday when they suffered burns after stepping into contaminated water. They are to be released from the hospital Monday.
Edano has urged TEPCO to be more transparent about the potential dangers after the safety agency revealed the plant operator was aware of high radiation levels in the air in Unit 3 several days before the two workers suffered burns there.
A top TEPCO official acknowledged Sunday it could take a long time to completely clean up the complex.
"We cannot say at this time how many months or years it will take," TEPCO Vice President Sakae Muto said, insisting the main goal now is to cool the reactors.
A poll, meanwhile, showed that support for Japan's prime minister has risen as the administration tackles the disasters.
The public opinion poll conducted over the weekend by Kyodo News agency found that approval of Prime Minister Naoto Kan and his Cabinet rose to 28.3 percent after sinking below 20 percent in February, before the earthquake and tsunami.
Last month's low approval led to speculation that Kan's days were numbered. While the latest figure is still low, it suggests he is making some gains with voters.
About 58 percent of respondents in the nationwide telephone survey of 1,011 people said they approved of the government's handling of the March 11 earthquake and tsunami, but a similar number criticized its handling of the nuclear crisis.

Copyright 2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Friday, March 25, 2011

Breach in reactor suspected at Japanese nuke plant

TOKYO (AP) — A suspected breach in the core of a reactor at the stricken Fukushima nuclear plant could mean more serious radioactive contamination, Japanese officials revealed Friday, as the prime minister called the country's ongoing fight to stabilize the plant "very grave and serious."
A somber Prime Minister Naoto Kan sounded a pessimistic note at a briefing hours after nuclear safety officials announced what could be a major setback in the urgent mission to stop the plant from leaking radiation, two weeks after a devastating earthquake and tsunami disabled it.
Nuclear and Industrial Safety Agency spokesman Hidehiko Nishiyama, right, huddles with his aide during a press conference on the crippled Fukushima Dai-ichi nuclear complex, in Tokyo on Friday March 25, 2011. (AP Photo/Kyodo News) JAPAN OUT, MANDATORY CREDIT, NO LICENSING IN CHINA, HONG KONG, JAPAN, SOUTH KOREA AND FRANCE

"The situation today at the Fukushima Dai-ichi power plant is still very grave and serious. We must remain vigilant," Kan said. "We are not in a position where we can be optimistic. We must treat every development with the utmost care."
The uncertain situation halted work at the nuclear complex, where dozens had been trying feverishly to stop the overheated plant from leaking dangerous radiation. The plant has leaked some low levels of radiation, but a breach could mean a much larger release of contaminants.
The possible breach in Unit 3 might be a crack or a hole in the stainless steel chamber of the reactor core or in the spent fuel pool that's lined with several feet of reinforced concrete. The temperature and pressure inside the core, which holds the fuel rods, remained stable and was far lower than would further melt the core.
Suspicions of a possible breach were raised when two workers waded into water 10,000 times more radioactive than levels normally found in water in or around a reactor and suffered skin burns, the Nuclear and Industrial Safety Agency said.
Kan apologized to farmers and business owners for the toll the radiation has had on their livelihoods: Several countries have halted some food imports from areas near the plant after milk and produce were found to contain elevated levels of radiation.
He also thanked utility workers, firefighters and military personnel for "risking their lives" to cool the overheated facility.
The alarm Friday comes two weeks to the day since the magnitude-9 quake triggered a tsunami that enveloped cities along the northeastern coast and knocked out the Fukushima reactor's cooling systems.
Police said the official death toll jumped past 10,000 on Friday. With the cleanup and recovery operations continuing and more than 17,400 listed as missing, the final number of dead was expected to surpass 18,000.
The nuclear crisis has compounded the challenges faced by a nation already saddled with a humanitarian disaster. Much of the frigid northeast remains a scene of despair and devastation, with Japan struggling to feed and house hundreds of thousands of homeless survivors, clear away debris and bury the dead.
A breach could mean a leak has been seeping for days, likely since the hydrogen explosion at Unit 3 on March 14. It's not clear if any of the contaminated water has run into the ground. Radiation readings for the air were not yet available for Friday, but detections in recent days have shown no significant spike.
But elevated levels of radiation have already turned up in raw milk, seawater and 11 kinds of vegetables, including broccoli, cauliflower and turnips. Tap water in several areas of Japan — including Tokyo — also showed radiation levels considered unsafe for infants, who are particularly vulnerable to cancer-causing radioactive iodine, officials said.
The scare caused a run on bottled water in the capital, and Tokyo municipal officials are distributing it to families with babies.
Previous radioactive emissions have come from intentional efforts to vent small amounts of steam through valves to prevent the core from bursting. However, releases from a breach could allow uncontrolled quantities of radioactive contaminants to escape into the surrounding ground or air.
Government spokesman Yukio Edano said "safety measures may not be adequate" and warned that may contribute to rising anxiety among people about how the disaster is being managed.
"We have to make sure that safety is secured for the people working in that area. We truly believe that is incumbent upon us," the chief Cabinet secretary told reporters.
Edano said people living 12 to 20 miles (20 to 30 kilometers) from the plant should still be safe from the radiation as long as they stay indoors. But since supplies are not being delivered to the area fast enough, he said it may be better for residents in the area to voluntarily evacuate to places with better facilities.
"If the current situation is protracted and worsens, then we will not deny the possibility of (mandatory) evacuation," he said.
NISA spokesman Hidehiko Nishiyama said later that plant operator Tokyo Electric Power Co. was issued a "very strong warning" for safety violations and that a thorough review would be conducted once the situation stabilizes.
Meanwhile, damage to factories was taking its toll on the world's third-largest economy and creating a ripple effect felt worldwide.
Nissan Motor Co. said it may move part of its engine production line to the United States because of damage to a plant.
The quake and tsunami are emerging as the world's most expensive natural disasters on record, wreaking up to $310 billion in damages, the government said.
"There is no doubt that we have immense economic and financial damage," Finance Minister Yoshihiko Noda said. "It will be our task how to recover from the damage."
At Sendai's port, brand new Toyota cars lay crushed in piles. At the airport, flooded by the tsunami on March 11, U.S. Marines used bulldozers and shovels to shift wrecked cars that lay scattered like discarded toys.
Still, there were examples of resilience, patience and fortitude across the region.
In Soma, a hard-hit town along the Fukushima prefecture coast, rubble covered the block where Hiroshi Suzuki's home once stood. He watched as soldiers dug into mounds of timber had been neighbors' homes in search of bodies. Just three bodies have been pulled out.
"I never expected to have to live through anything like this," he said mournfully. Suzuki is one of Soma's lucky residents, but the tsunami washed away the shop where he sold fish and seaweed.
"My business is gone. I don't think I will ever be able to recover," said Suzuki, 59.
Still, he managed to find a bright side. "The one good thing is the way everyone is pulling together and helping each other. No one is stealing or looting," he said.
"It makes me feel proud to be Japanese."

Copyright 2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Saturday, March 19, 2011

Japan cites radiation in milk, spinach near plant

FUKUSHIMA, Japan (AP) — Japan said radiation levels in spinach and milk from farms near its tsunami-crippled nuclear complex exceeded government safety limits, as emergency teams scrambled Saturday to restore power to the plant so it could cool dangerously overheated fuel.
Firefighters also pumped tons of water directly from the ocean into one of the most troubled areas of the Fukushima Dai-ichi nuclear complex, the cooling pool for used fuel rods at the plant's Unit 3, which are at risk of burning up and sending a broad release of radioactive material into the environment.
A helicopter, carrying nurses to a town hospital from outside, flies over a wrecked building lying on its side in Onagawa, Miyagi Prefecture, Japan, Friday, March 18, 2011, a week after a strong earthquake and tsunami hit northeastern coast towns in Japan. (AP Photo/Kyodo News) JAPAN OUT, MANDATORY CREDIT, NO LICENSING IN CHINA, HONG KONG, JAPAN, SOUTH KOREA AND FRANCE

The first word on contaminated food in the crisis came as Japan continued to grapple with overwhelming consequences of the cascade of disasters unleashed by a 9.0-magnitude earthquake on March 11. The quake spawned a tsunami that ravaged Japan's northeast coast, killing more than 7,200 people, and knocked out backup cooling systems at the nuclear plant, which has been leaking radiation.
The tainted milk was found 20 miles (30 kilometers) from the plant while the spinach was collected between 50 miles (80 kilometers) and 65 miles (100 kilometers) to the south, Chief Cabinet Secretary Yukio Edano told reporters in Tokyo.
While the radiation levels exceeded the limits allowed by the government, Edano said that the products "pose no immediate health risk" and that more testing was being done on other foods. If tests show further contamination, Edano said food shipments would be halted from the area.
"It's not like if you ate it right away you would be harmed," Edano said. "It would not be good to continue to eat it for some time."
Edano said the amount of radiation detected in the milk would as much as one CT scan if consumed continually for a year while for spinach it would be a fifth of one CT scan. A CT scan is a compressed series of X-rays used for medical tests.
Just outside the bustling disaster response center in the city of Fukushima, 40 miles (60 kilometers) northwest of the plant, government nuclear specialist Kazuya Konno was able to take only a three-minute break for his first meeting with his wife Junko and their children since the quake.
"It's very nerve-racking. We really don't know what is going to become of our city," said Junko Konno, 35. "Like most other people we have been staying indoors unless we have to go out."
She brought her husband a small backpack with a change of clothes and snacks. The girls — aged 4 and 6 and wearing pink surgical masks decorated with Mickey Mouse — gave their father hugs.
Low levels of radiation have been detected well beyond Tokyo, which is 140 miles (220 kilometers) south of the plant, but hazardous levels have been limited to the plant itself.
Nuclear reactors at the Fukushima Dai-ichi plant began overheating and leaking radiation into the atmosphere in the days after the March 11 quake and the subsequent tsunami overwhelmed its cooling systems. The government admitted it was slow to respond to the nuclear troubles, which added another crisis on top of natural disasters which left an estimated more than 10,000 dead and displaced more than 400,000 others.
The situation is deeply troubled, Edano said Saturday, but at least it's not growing worse.
"The situation at the nuclear complex still remains unpredictable. But at least we are preventing things from deteriorating," Edano said.
A fire truck with a high-pressure cannon parked outside the plant's Unit 3, about 300 meters (yards) from the Pacific coast, and began shooting an arc of water nonstop into the pool for seven straight hours, said Kenji Kawasaki, a spokesman for the nuclear safety agency.
A separate pumping vehicle will keep the firetruck's water tank refilled. Because of high radiation levels, firefighters will only go to the truck every three hours when it needs to be refueled. They expect to pump about 1,400 tons of water, nearly the capacity of the pool.
Meanwhile, Hidehiko Nishiyama of Japan's Nuclear and Industrial Safety Agency said backup power systems at the plant had been improperly protected, leaving them vulnerable to the tsunami that savaged the northeastern coast after the quake and killed more than 7,200 people.
The failure of Fukushima's backup power systems, which were supposed to keep cooling systems going in the aftermath of the massive 9.0-magnitude earthquake, let uranium fuel overheat and were a "main cause" of the crisis, Nishiyama said.
"I cannot say whether it was a human error, but we should examine the case closely," he told reporters.
A spokesman for Tokyo Electric Power Co., which owns and runs the plants, said that while the generators themselves were not directly exposed to the waves, some electrical support equipment was outside. The complex was protected against tsunamis of up to 5 meters (16 feet), he said. Media reports say the tsunami was at least 6 meters (20 feet) high when it struck Fukushima.
Motoyasu Tamaki also acknowledged that the complex was old, and might not have been as well-equipped as newer facilities.
Plant operators also said they would reconnect four of the plant's six reactor units to a power grid Saturday. Although a replacement power line reached the complex Friday, workers had to methodically work through badly damaged and deeply complex electrical systems to make the final linkups without setting off a spark and potentially an explosion.
"Most of the motors and switchboards were submerged by the tsunami and they cannot be used," Nishiyama said.
Even once the power is reconnected, it is not clear if the cooling systems will still work.
The storage pools need a constant source of cooling water. Even when removed from reactors, uranium rods are still extremely hot and must be cooled for months, possibly longer, to prevent them from heating up again and emitting radioactivity.
As Japan crossed the one-week mark since the cascade of disasters began, the government conceded Friday it was slow to respond and welcomed ever-growing help from the United States in hopes of preventing a complete meltdown at the nuclear plant.
The United States has loaned military firefighting trucks to the Japanese, and has conducted overflights of the reactor site, strapping sophisticated pods onto aircraft to measure radiation aloft. Two tests conducted Thursday gave readings that U.S. Deputy Energy Secretary Daniel B. Poneman said reinforced the U.S. recommendation that people stay 50 miles (80 kilometers) away from the Fukushima plant. Japan has ordered only a 12-mile (20-kilometer) evacuation zone around the plant.
Emergency crews at the nuclear plant faced two continuing challenges: cooling the nuclear fuel in reactors where energy is generated and cooling the adjacent pools where thousands of used nuclear fuel rods are stored in water.
The tsunami knocked out power to cooling systems at the nuclear plant and its six reactors. In the week since, four have been hit by fires, explosions or partial meltdowns.
Japan's government on Friday raised the accident classification for the nuclear crisis, putting it on a par with the Three Mile Island accident in Pennsylvania in 1979, and signified its consequences went beyond the local area.
This crisis has led to power shortages and factory closures, hurt global manufacturing and triggered a plunge in Japanese stock prices.
Police said more than 452,000 people made homeless by the quake and tsunami were staying in schools and other shelters, as supplies of fuel, medicine and other necessities ran short.

Copyright 2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Thursday, March 17, 2011

Japanese choppers dump water on stricken reactor

ZAO, Japan (AP) — Military helicopters dumped loads of seawater onto Japan's stricken nuclear complex Thursday, turning to combat-style tactics while trying to cool overheated uranium fuel that may be on the verge of spewing out more radiation.
Plant operators also said they were racing to finish a new power line that could restore cooling systems and ease the crisis at the Fukushima Dai-ichi plant on the country's northeast coast.
Japan's Self-Defense Forces's helicopter heads to the Fukushima Dai-ichi nuclear power plant to dump water on the stricken reactor in Okumamachi Thursday morning, March 17, 2011. (AP Photo/Asahi Shimbun, Masaru Komiyaji) JAPAN OUT, NO SALES, MANDATORY CREDIT

The top U.S. nuclear regulatory official gave a far bleaker assessment of the situation than the Japanese, and the U.S. ambassador said the situation was "deteriorating" while warning U.S. citizens within 50 miles (80 kilometers) of the complex to leave the area or at least remain indoors.
The Japanese government said it had no plans to expand its mandatory, 12-mile (20-kilometer) exclusion zone around the plant, while also urging people within 20 miles (30 kilometers) to stay inside.
The troubles at the nuclear complex were set in motion last week's 9.0-magnitude earthquake and tsunami knocked out power and destroyed backup generators needed for the reactors' cooling systems. That added a nuclear crisis on top of twin natural disasters that likely killed well more than 10,000 people and left hundreds of thousands homeless.
Four of the plant's six reactors have faced serious crises involving fires, explosions, damage to the structures housing reactor cores, partial meltdowns or rising temperatures in the pools used to store spent nuclear fuel. Officials also recently announced that temperatures are rising in the spent fuel pools of the last two reactors.
Two Japanese military CH-47 Chinook helicopters began dumping seawater on the complex's damaged Unit 3 at 9:48 a.m. (0048 GMT, 8:48 p.m. EDT), defense ministry spokeswoman Kazumi Toyama said. The choppers dumped at least four loads on the reactor in just the first 10 minutes, though television footage showed much of it appearing to disperse in the wind.
Chopper crews were flying missions of about 40 minutes each to limit their radiation exposure, passing over the reactor with loads of about 7,500 liters (about 2,000 gallons) of water.
The dousing is aimed at cooling the Unit 3 reactor, as well as replenishing water in that unit's cooling pool, where used fuel rods are stored, Toyama said. The plant's owner, Tokyo Electric Power Co., said earlier that pool was nearly empty, which would cause the rods to overheat and emit even more radiation.
Defense Minister Toshifumi Kitazawa told reporters that emergency workers had no choice but to try the water dumps before it was too late.
U.S. officials, meanwhile, said Unit 4 also was seriously at risk.
U.S. Nuclear Regulatory Commission Chairman Gregory Jaczko said at a congressional hearing in Washington that all the water was gone from that unit's spent fuel pool. Jaczko said anyone who gets close to the plant could face potentially lethal doses of radiation.
"We believe radiation levels are extremely high," he said.
Tokyo Electric executives said Thursday that they believed the rods in that pool were covered with water, but an official with Japan's nuclear safety agency later expressed skepticism about that and moved closer to the U.S. position.
"Considering the amount of radiation released in the area, the fuel rods are more likely to be exposed than to be covered," Yuichi Sato said.
Chief Cabinet Secretary Yukio Edano said that along with the helicopter water drops, special police units would use water cannons — normally used to quell rioters — to spray water onto the Unit 3 storage pool. The high-pressure water cannons will allow emergency workers to stay farther away.
Military vehicles designed to extinguish fires at plane crashes will also be used, said Gen. Ryoichi Oriki.
Emergency workers were forced to temporarily retreat from the plant Wednesday when radiation levels soared, losing precious time. While the levels later dropped, they were still too high to let workers get close.
The storage pools need a constant source of cooling water. Even when removed from reactors, uranium rods are still extremely hot and must be cooled for months, possibly longer, to prevent them from heating up again and emitting radioactivity.
A core team of 180 emergency workers has been at the forefront of the struggle at the plant, rotating in and out of the complex to try to reduce their radiation exposure.
But experts said that anyone working close to the reactors was almost certainly being exposed to radiation levels that could, at least, give them much higher cancer risks.
"I don't know any other way to say it, but this is like suicide fighters in a war," said Keiichi Nakagawa, associate professor of the Department of Radiology at University of Tokyo Hospital.
Experts note, though, that radiation levels drop quickly with distance from the complex. While elevated radiation has been detected well outside the evacuation zone, experts say those levels are not dangerous.
U.S. officials were taking no chances, and Prime Minister Naoto Kan and U.S. President Barack Obama spoke about the crisis early Thursday.
In a statement, U.S. Ambassador John V. Roos made his evacuation recommendation "in response to the deteriorating situation" at the Fukushima complex. In Washington, the State Department warned U.S. citizens to consider leaving the country, and offered voluntary evacuation to family members and dependents of U.S. personnel in the cities of Tokyo, Yokohama and Nagoya.
Chartered planes also would be brought in to help private American citizens who wished to leave, the State Department said.
While American officials have been careful not to criticize Japan's response, they have made clear it's difficult to ascertain what is going on.
"It's a very fluid and indeed it's a very confused situation," U.S. Deputy Energy Secretary Daniel Poneman told reporters Wednesday.
Japanese officials raised hopes of easing the crisis early Thursday, saying they may be close to bringing power back to the plant. The new power line would revive electric-powered pumps, making it easier for workers to control the high temperatures.
Tokyo Electric officials said they hoped to have the new power line working later Thursday, and had electricians standing by to connect the power plant. The company also is trying to repair its existing disabled power line.
Nearly a week after the disaster, police said more than 452,000 people were staying in schools and other shelters, as supplies of fuel, medicine and other necessities ran short. Both victims and aid workers appealed for more help.
"There is enough food, but no fuel or gasoline," said Yuko Niuma, 46, as she stood looking out over Ofunato harbor, where trawlers were flipped on their sides.
Along the tsunami-savaged coast, people must stand in line for food, gasoline and kerosene to heat their homes. In the town of Kesennuma, they lined up to get into a supermarket after a delivery of key supplies, such as instant rice packets and diapers.
Each person was only allowed to buy 10 items, NHK television reported.
With diapers hard to find in many areas, an NHK program broadcast a how-to session on fashioning a diaper from a plastic shopping bag and a towel.
More than 5,300 people are officially listed as dead, but officials believe the toll will climb to well over 10,000.
Other countries have complained that Japan has been too slow and vague in releasing details about its rapidly evolving crisis at the complex of six reactors along Japan's northeastern coast.

Copyright 2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Tuesday, March 15, 2011

Radiation level soars after Japan nuke plant fire

SOMA, Japan (AP) — Dangerous levels of radiation leaking from a crippled nuclear plant forced Japan to order 140,000 people to seal themselves indoors Tuesday after an explosion and a fire dramatically escalated the crisis spawned by a deadly tsunami.
In a nationally televised statement, Prime Minister Naoto Kan said radiation had spread from the four stricken reactors of the Fukushima Dai-ichi nuclear plant along Japan's northeastern coast. The region was shattered by Friday's 9.0-magnitude earthquake and the ensuing tsunami that is believed to have killed more than 10,000 people, plunged millions into misery and pummeled the world's third-largest economy.
Japanese officials told the International Atomic Energy Agency that the reactor fire was in a fuel storage pond — an area where used nuclear fuel is kept cool — and that "radioactivity is being released directly into the atmosphere." Long after the fire was extinguished, a Japanese official said the pool might still be boiling, though the reported levels of radiation had dropped dramatically by the end of the day.
Women wail together after hearing the death of family members at an evacuation center in Kesennuma in Miyagi prefecture (state) Tuesday, March 15, 2011, after Friday's massive earthquake and tsunami. (AP Photo/Kyodo News) JAPAN OUT, MANDATORY CREDIT, NO LICENSING IN CHINA, HONG KONG, JAPAN, SOUTH KOREA AND FRANCE
That reactor, Unit 4, had been shut down before the quake for maintenance.
If the water boils, it could evaporate, exposing the rods. The fuel rods are encased in safety containers meant to prevent them from resuming nuclear reactions, nuclear officials said. But they acknowledged that there could have been damage to the containers. They also confirmed that the walls of the storage pool building were damaged.
Experts noted that much of the leaking radiation was apparently in steam from boiling water. It had not been emitted directly by fuel rods, which would be far more virulent, they said.
"It's not good, but I don't think it's a disaster," said Steve Crossley, an Australia-based radiation physicist.
Even the highest detected rates were not automatically harmful for brief periods, he said.
"If you were to spend a significant amount of time — in the order of hours — that could be significant," Crossley said.
Less clear were the results of the blast in Unit 2, near a suppression pool, which removes heat under a reactor vessel, said plant owner Tokyo Electric Power Co. The nuclear core was not damaged but the bottom of the surrounding container may have been, said Shigekazu Omukai, a spokesman for Japan's nuclear safety agency.
Though Kan and other officials urged calm, Tuesday's developments fueled a growing panic in Japan and around the world amid widespread uncertainty over what would happen next. In the worst case scenario, one or more of the reactor cores would completely melt down, a disaster that could spew large amounts of radioactivity into the atmosphere.
"I worry a lot about fallout," said Yuta Tadano, a 20-year-old pump technician at the Fukushima plant, who said he was in the complex when the quake hit.
"If we could see it, we could escape, but we can't," he said, cradling his 4-month-old baby, Shoma, at an evacuation center.
The radiation fears added to the catastrophe that has been unfolding in Japan, where at least 10,000 people are believed to have been killed and millions of people were facing a fifth night with little food, water or heating in near-freezing temperatures and snow as they dealt with the loss of homes and loved ones. Up to 450,000 people are in temporary shelters.
Officials have only been able to confirm a far lower toll — about 3,300 killed — but those who were involved in the 2004 Asian tsunami said there was no question more people died and warned that, like the earlier disaster, many thousands may never be found.
Asia's richest country hasn't seen such hardship since World War II. The stock market plunged for a second day and a spate of panic buying saw stores running out of necessities, raising government fears that hoarding may hurt the delivery of emergency food aid to those who really need it.
In a rare bit of good news, rescuers found two survivors Tuesday in the rubble left by the tsunami that hit the northeast, including a 70-year-old woman whose house was tossed off its foundation.
The Fukushima Dai-ichi nuclear complex, along that battered coastline, has been the focus of the worries. Workers there have been desperately trying to use seawater to cool the fuel rods in the complex's three reactors, all of which lost their cooling ability after Friday's quake and tsunami.
On Tuesday, the complex was hit by its third explosion since Friday, and then a fire in a separate reactor.
Afterward, officials in Ibaraki, a neighboring prefecture just south of the area, said up to 100 times the normal levels of radiation were detected Tuesday. While those figures are worrying if there is prolonged exposure, they are far from fatal.
Tokyo reported slightly elevated radiation levels, but officials said the increase was too small to threaten the 39 million people in and around the capital, about 170 miles (270 kilometers) away. Closer to the stricken nuclear complex, the streets in the coastal city of Soma were empty as the few residents who remained there heeded the government's warning to stay indoors.
Kan and other officials warned there is a danger of more leaks and told people living within 19 miles (30 kilometers) of the Fukushima Dai-ichi complex to stay indoors to avoid exposure that could make people sick.
"Please do not go outside. Please stay indoors. Please close windows and make your homes airtight," Chief Cabinet Secretary Yukio Edano told residents in the danger zone.
"These are figures that potentially affect health. There is no mistake about that," he said.
Weather forecasts for Fukushima were for snow and wind Tuesday evening, blowing southwest toward Tokyo, then shifting and blowing east out to sea. That's important because it shows which direction a possible nuclear cloud might blow.
Some 70,000 people had already been evacuated from a 12-mile (20-kilometer) radius from the Dai-ichi complex. About 140,000 remain in the new danger zone.
Officials said 70 workers were at the complex, struggling with its myriad problems. The workers, all of them wearing protective gear, are being rotated in and out of the danger zone quickly to reduce their radiation exposure.
Another 800 staff were evacuated. The fires and explosions at the reactors have injured 15 workers and military personnel and exposed up to 190 people to elevated radiation.
Temperatures in at least two of the complex's reactors, units 5 and 6, were also slightly elevated, Edano said.
"The power for cooling is not working well and the temperature is gradually rising, so it is necessary to control it," he said.
Fourteen pumps have been brought in to get seawater into the other reactors. They are not yet pumping water into Unit 4 but are trying to figure out how to do that.
In Tokyo, slightly higher-than-normal radiation levels were detected Tuesday but officials insisted there are no health dangers.
"The amount is extremely small, and it does not raise health concerns. It will not affect us," Takayuki Fujiki, a Tokyo government official said.
Edano said the radiation readings had fallen significantly by the evening.
Japanese government officials are being rightly cautious, said Donald Olander, professor emeritus of nuclear engineering at University of California at Berkeley. He believed even the heavily elevated levels of radiation around Dai-ichi are "not a health hazard." But without knowing specific dose levels, he said it was hard to make judgments.
"Right now it's worse than Three Mile Island," Olander said. But it's nowhere near the levels released during Chernobyl.
On Three Mile Island, the radiation leak was held inside the containment shell — thick concrete armor around the reactor. The Chernobyl reactor had no shell and was also operational when the disaster struck. The Japanese reactors automatically shut down when the quake hit and are encased in containment shells.
Rescuers were heartened Tuesday to find two survivors.
Seventy-year-old Sai Abe was pulled from her toppled home in the port town of Otsuchi. She was suffering from hypothermia but appeared to have no life-threatening injuries, rescue official Yuko Kotani said.
Another survivor, described as being in his 20s, was shown on television being pulled from a building further down the coast in the city of Ishimaki after rescue workers heard him calling for help.
The impact of the earthquake and tsunami dragged down stock markets. The benchmark Nikkei 225 stock average plunged for a second day Tuesday, nose-diving more than 10 percent to close at 8,605.15 while the broader Topix lost more than 8 percent.
To lessen the damage, Japan's central bank made two cash injections totaling 8 trillion yen ($98 billion) Tuesday into the money markets after pumping in $184 billion on Monday.
Initial estimates put repair costs in the tens of billions of dollars, costs that would likely add to a massive public debt that, at 200 percent of gross domestic product, is the biggest among industrialized nations.
The Dai-ichi plant is the most severely affected of three nuclear complexes that were declared emergencies after suffering damage in Friday's quake and tsunami, raising questions about the safety of such plants in coastal areas near fault lines and adding to global jitters over the industry.

Copyright 2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Monday, March 14, 2011

Japanese ordered indoors in radiation leak crisis

SOMA, Japan (AP) — Radiation leaked from a crippled nuclear plant in tsunami-ravaged northeastern Japan after a third reactor was rocked by an explosion Tuesday and a fourth caught fire in a dramatic escalation of the 4-day-old catastrophe. The government warned anyone nearby to stay indoors to avoid exposure.
Tokyo also reported slightly elevated radiation levels but officials said the increase was too small to threaten anyone in the capital.
In a nationally televised statement, Prime Minister Naoto Kan said radiation has spread from four reactors of the Fukushima Dai-ichi nuclear plant in Fukushima province, one of the hardest-hit in Friday's 9.0-magnitude earthquake and the ensuing tsunami that has killed more than 10,000 people.

In this image made off Japan's NTV/NNN Japan television footage, smoke ascends from the Fukushima Dai-ichi nuclear plant's Unit 3 in Okumamachi, Fukushima Prefecture, northern Japan, Monday, March 14, 2011. The second hydrogen explosion in three days rocked Japan's stricken nuclear plant Monday, sending a massive column of smoke into the air and wounding 11 workers. (AP Photo/NTV/NNN Japan) MANDATORY CREDIT, JAPAN OUT, TV OUT, NO SALES, EDITORIAL USE ONLY
"The level seems very high, and there is still a very high risk of more radiation coming out," Kan said. "We are making utmost efforts to prevent further explosions and radiation leaks."
This is the worst nuclear crisis Japan has faced since the atomic bombing of Hiroshima and Nagasaki during World War II. It is also the first time that such a grave nuclear threat has been raised in the world since a nuclear power plant in Chernobyl, Ukraine exploded in 1986.
Kan warned there are dangers of more leaks and told people living within 19 miles (30 kilometers) of the Fukushima Dai-ichi complex to stay indoors to avoid radiation sickness. Some 70,000 people had already been evacuated from a 12-mile (20-kilometer) radius and 140,000 remain in the zone for which the new warning was issued.
Three reactors at the power plant were in critical condition after Friday's quake, losing their ability to cool down and releasing some radiation. A fourth reactor that was unoperational caught fire on Tuesday and more radiation was released, Chief Cabinet Secretary Yukio Edano said.
The fire was put out. Even though it was unoperational, the fourth reactor was believed to be the source of the elevated radiation release because of the hydrogen release that triggered the fire.
"It is likely that the level of radiation increased sharply due to a fire at Unit 4," Edano said. "Now we are talking about levels that can damage human health. These are readings taken near the area where we believe the releases are happening. Far away, the levels should be lower," he said.
"Please do not go outside. Please stay indoors. Please close windows and make your homes airtight. Don't turn on ventilators. Please hang your laundry indoors," he said.
"These are figures that potentially affect health. There is no mistake about that," he said.
He said a reactor whose containment building caught fire Monday has not contributed greatly to the increased radiation. The radiation level around one of the reactors stood at 400,000 microsiverts per hour, four times higher than the safe level.
Officials said 50 workers were still there trying to put water into the reactors to cool them. They say 800 other staff were evacuated. The fires and explosions at the reactors have injured 15 workers and military personnel and exposed up to 190 people to elevated radiation.
In Tokyo, slightly higher-than-normal radiation levels were detected Tuesday but officials insisted there are no health dangers.
"The amount is extremely small, and it does not raise health concerns. It will not affect us," Takayuki Fujiki, a Tokyo government official said.
The death toll from last week's earthquake and tsunami jumped Tuesday as police confirmed the number killed had topped 2,400, though that grim news was overshadowed by a deepening nuclear crisis. Officials have said previously that at least 10,000 people may have died in Miyagi province alone.
Millions of people spent a fourth night with little food, water or heating in near-freezing temperatures as they dealt with the loss of homes and loved ones. Asia's richest country hasn't seen such hardship since World War II.
Hajime Sato, a government official in Iwate prefecture, one of the hardest-hit, said deliveries of supplies were only 10 percent of what is needed. Body bags and coffins were running so short that the government may turn to foreign funeral homes for help, he said.
Though Japanese officials have refused to speculate on the death toll, Indonesian geologist Hery Harjono, who dealt with the 2004 Asian tsunami, said it would be "a miracle really if it turns out to be less than 10,000" dead.
The 2004 tsunami killed 230,000 people — of which only 184,000 bodies were found.
Harjono noted that many bodies in Japan may have been sucked out to sea or remain trapped beneath rubble as they did in Indonesia's hardest-hit Aceh province. But he also stressed that Japan's infrastructure, high-level of preparedness and city planning to keep houses away from the shore could mitigate its human losses.
The impact of the earthquake and tsunami on the world's third-largest economy helped drag down the share markets Monday, the first business day since the disasters. The benchmark Nikkei 225 stock average for a second day Tuesday, by 6.5 percent to 8,999.73, wiping out this year's gains while the broader Topix index lost 7.5 percent.
To lessen the damage, Japan's central bank injected $61.2 billion Tuesday into the money markets after pumping in $184 billion on Monday.
Initial estimates put repair costs in the tens of billions of dollars, costs that would likely add to a massive public debt that, at 200 percent of gross domestic product, is the biggest among industrialized nations.
In a bid to stop the reactors at the nuclear plant from melting down, engineers have been injecting seawater as a coolant of last resort.
Yuta Tadano, a 20-year-old pump technician at the Fukushima power plant, said he was on the second floor of an office building in the complex when quake hit.
"It was terrible. The desks were thrown around and the tables too. The walls started to crumble around us and there was dust everywhere. The roof began to collapse.
"We got outside and confirmed everyone was safe . Then we got out of there. We had no time to be tested for radioactive exposure. I still haven't been tested," Tadano told The Associated Press at an evacuation center outside the exclusion zone.
"We live about 10 kilometers (6 miles) from the facility. We had to figure out on our own where to go," said Tadano, cradling his 4-month-old baby, Shoma. "I worry a lot about fallout. If we could see it we could escape, but we can't."
"Just because we are an evacuation center doesn't mean we are safe," said his sister-in-law Makiko Murasawa, 43.
The nuclear crisis has also raised global concerns about the safety of nuclear power at a time when it has seen a resurgence as an alternative to fossil fuels.
The head of the International Atomic Energy Agency said the Japanese government has asked the agency to send experts to help.
The Dai-ichi plant is the most severely affected of three nuclear complexes that were declared emergencies after suffering damage in Friday's quake and tsunami, raising questions about the safety of such plants in coastal areas near fault lines and adding to global jitters over the industry.
Switzerland ordered a freeze on new plants, while Germany said it was suspending a decision to extend the life of its nuclear plants. The United States said it would try to learn from the Japanese crisis but that events would not diminish the U.S. commitment to nuclear power.
"When we talk about reaching a clean energy standard, it is a vital part of that," White House spokesman Jay Carney said.
Meanwhile, 17 U.S. military personnel involved in helicopter relief missions were found to have been exposed to low levels of radiation after they flew back from the devastated coast to the USS Ronald Reagan, an aircraft carrier about 100 miles (160 kilometers) offshore.
U.S. officials said the exposure level was roughly equal to one month's normal exposure to natural background radiation, and the 17 were declared contamination-free after scrubbing with soap and water.
As a precaution, the carrier and other 7th Fleet ships involved in relief efforts had shifted to another area, the U.S. said.

Copyright 2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.