Monday, March 21, 2011

WHO warns of "serious" food radiation in disaster-hit Japan

OKYO (Reuters) – The World Health Organization said on Monday that radiation in food after an earthquake damaged a Japanese nuclear plant was more serious than previously thought, eclipsing signs of progress in a battle to avert a catastrophic meltdown in its reactors.

Engineers managed to rig power cables to all six reactors at the Fukushima complex, 240 km (150 miles) north of Tokyo, and started a water pump at one of them to reverse the overheating that has triggered the world's worst nuclear crisis in 25 years.

Some workers were later evacuated from one of the most badly damaged reactors when smoke briefly rose from the site. There was no immediate explanation for the smoke, but authorities had said earlier that pressure was building up at the No. 3 reactor.

Smoke was also seen at the No. 2 reactor.

The March 11 earthquake and tsunami left more than 21,000 people dead or missing and will cost an already beleaguered economy some $250 billion, making it the world's costliest ever natural disaster.

The head of the U.N. atomic agency said the nuclear situation remained very serious but it would be resolved.

"I have no doubt that this crisis will be effectively overcome," Yukiya Amano, director general of the International Atomic Energy Agency (IAEA), told an emergency board meeting.

"We see a light for getting out of the crisis," a Japanese government official quoted Prime Minister Naoto Kan as saying.

But news of progress at the nuclear plant was overshadowed by mounting concern that radioactive particles already released into the atmosphere have contaminated food and water supplies.

"Quite clearly it's a serious situation," Peter Cordingley, Manila-based spokesman for the World Health Organization's (WHO) regional office for the Western Pacific, told Reuters in a telephone interview.

"It's a lot more serious than anybody thought in the early days when we thought that this kind of problem can be limited to 20 to 30 kilometers ... It's safe to suppose that some contaminated produce got out of the contamination zone."

However, he said there was no evidence of contaminated food from Fukushima reaching other countries.

Fukushima is the world's worst nuclear accident since Chernobyl, but signs are that it is far less severe than the Ukrainian disaster.

"The few measurements of radiation reported in food so far are much lower than around Chernobyl in 1986, but the full picture is still emerging," Malcolm Crick, secretary of the U.N. Scientific Committee on the Effects of Atomic Radiation, told Reuters.

TAP WATER

Japan's health ministry has urged some residents near the plant to stop drinking tap water after high levels of radioactive iodine were detected.

Cases of contaminated vegetables and milk have already stoked anxiety despite assurances from officials that the levels are not dangerous. The government has prohibited the sale of spinach from all four prefectures near the plant and also banned selling of raw milk from Fukushima prefecture.

There were no major reports of contaminated food in Tokyo, a city of about 13 million people. City officials however said higher-than-standard levels of iodine were found in an edible form of chrysanthemum.

"From reports I have heard so far, it seems that the levels of radioactive iodine and caesium in milk and some foodstuffs are significantly higher than government limits," said Jim Smith, a specialist in earth and environmental sciences at Britain's Portsmouth University.

"This doesn't mean that consumption of these products is necessarily an immediate threat, as limits are set so that foodstuffs can be safely consumed over a fairly long period of time. Nevertheless, for foodstuffs which are found to be above limits, bans on sale and consumption will have to be put in place in the affected areas."

Japan is a net importer of food, but has substantial exports -- mainly fruit, vegetables, dairy products and seafood -- with its biggest markets in Hong Kong, China and the United States.

China will monitor food imported from Japan, the Xinhua news agency said, citing the country's quality control watchdog. South Korea will expand radioactivity inspection to processed and dried agricultural Japanese food, from just fresh produce.

In Taipei, one of the top Japanese restaurants in the city is offering diners the use of a radiation gauge in case they were nervous about the food.

MELTDOWN

The prospects of a nuclear power plant meltdown in the world's third-biggest economy and its key position in global supply chains rattled investors worldwide last week and prompted rare joint currency intervention by the G7 group of rich nations to stabilize markets.

Moody's Investors Service said in a report that the downside risks from the crisis had increased over the past week for the economy, sovereign credit, banking, insurance and non-financial corporate sectors.

Tokyo's markets were closed for a holiday on Monday. The Nikkei index shed 10 percent last week, wiping $350 billion off market capitalization, and at one point had lost as much as 20 percent in value.

In a much-needed boost for the battered market, billionaire investor Warren Buffett said the earthquake and tsunami were an "enormous blow" but should not prompt the selling of Japanese shares. Instead, he called events a "buying opportunity".

"It will take some time to rebuild. But it will not change the economic future of Japan. If I owned Japanese stocks, I would certainly not be selling them," Buffett said during a visit to a South Korean factory run by a company that is owned by one of his funds.

SITUATION CRITICAL AT PLANT

At Fukushima, 300 engineers have worked around the clock inside an evacuation zone to contain the worst nuclear accident since Chernobyl, Ukraine, in 1986.

They have been spraying the coastal complex with thousands of tonnes of sea water so fuel rods will not overheat and emit more radiation. Hopes for a more permanent solution depend on electricity cables reactivating on-site water pumps at each of the six reactors.

The most badly damaged reactors are No. 3 and 4, which were both hit by explosions last week.

Official tolls of dead and missing are rising steadily -- to 8,450 and 12,931 respectively.

The death toll could jump dramatically since police said they believed more than 15,000 people had been killed in Miyagi prefecture, one of four that took the brunt of the tsunami.

The 9.0-magnitude quake and ensuing 10-meter (32-ft) tsunami made more than 350,000 people homeless. Food, water, medicine and fuel are short in some parts, and near-freezing temperatures during Japan's winter are not helping.

(Additional reporting by Paul Eckert in Tokyo, Yoko Kubota and Chang-ran Kim in Rikuzentakata, Jon Herskovitz and Chisa Fujioka in Kamaisha, and Sui-Lee Wee in Beijing; Writing by Andrew Cawthorne and Jason Szep; Editing by Dean Yates, John Chalmers and Daniel Magnowski)

Source: http://news.yahoo.com/s/nm/wl_nm/us_japan_quake

Phivolcs: Magnitude-5.8 quake hits Luzon

A magnitude-5.8 quake rocked parts of Luzon, including parts of Metro Manila, Monday night, a day after a magnitude-6.1 quake hit Northern Luzon.

Philippine Institute of Volcanology and Seismology head Renato Solidum Jr. said the quake was recorded at 6:36 p.m., and was tectonic.

Our estimate is that the quake was magnitude 5.8, about 34 km underground. We estimate the epicenter to be at Lubang Island, Solidum said in an interview on the newscast.

Citing initial reports reaching him, he said the quake was felt in Manila, Quezon City and Makati City. He said the quake was not connected with the magnitude-6.1 quake that hit Northern Luzon Sunday.

Solidum said Sunday's quake stemmed from the Manila Trench while Monday's quake was traced to the Lubang Fault.

The United States Geological Survey measured the quake at magnitude 5.4, and estimated the epicenter at 57 km west-northwest of Batangas; 88 km south-southwest of Manila; or 90 km northwest of Calapan, Mindoro.

Separate reports on dzBB said the quake was felt in Manila, Quezon City, Taguig, Batangas, and Mindoro.

On the other hand, the Phivolcs website was not immediately accessible, with visitors getting an error message. - KBK, GMA News

Source: http://www.gmanews.tv/story/215831/nation/phivolcs-magnitude-58-quake-hits-luzon

Sunday, March 20, 2011

Japan's disaster toll rises with 18,000 deaths

FUKUSHIMA, Japan – The toll of Japan's triple disaster came into clearer focus Monday after police estimates showed more than 18,000 people died, the World Bank said rebuilding may cost $235 billion and more cases of radiation-tainted vegetables and tap water turned up.

Japanese officials reported progress over the weekend in their battle to gain control over a nuclear complex that began leaking radiation after suffering quake and tsunami damage, though the crisis was far from over, with a dangerous new surge in pressure reported in one of the plant's six reactors.

The announcement by Japan's Health Ministry late Sunday that tests had detected excess amounts of radioactive elements on canola and chrysanthemum greens marked a low moment in a day that had been peppered with bits of positive news: First, a teenager and his grandmother were found alive nine days after being trapped in their earthquake-shattered home. Then, the operator of the overheated nuclear plant said two of the six reactor units were safely cooled down.

"We consider that now we have come to a situation where we are very close to getting the situation under control," Deputy Cabinet Secretary Tetsuro Fukuyama said.

Still, serious problems remained at the Fukushima Dai-ichi nuclear complex. Pressure unexpectedly rose in a third unit's reactor, meaning plant operators may need to deliberately release radioactive steam. That has only added to public anxiety over radiation that began leaking from the plant after a monstrous earthquake and tsunami devastated northeastern Japan on March 11 and left the plant unstable. As day broke Monday, Japan's military resumed dousing of the complex's troubled Unit 4.

The World Bank said in report Monday that Japan may need five years to rebuild from the catastrophic disasters, which caused up to $235 billion in damage, saying the cost to private insurers will be up to $33 billion and that the government will spend $12 billion on reconstruction in the current national budget and much more later.

The safety of food and water was of particular concern. The government halted shipments of spinach from one area and raw milk from another near the nuclear plant after tests found iodine exceeded safety limits. Tokyo's tap water, where iodine turned up Friday, now has cesium. Rain and dust are also tainted.

Early Monday , the Health Ministry advised Iitate, a village of 6,000 people about 30 kilometers (19 miles) northwest of the Fukushima plant, not to drink tap water due to elevated levels of iodine. Ministry spokesman Takayuki Matsuda said iodine three times the normal level was detected there — about one twenty-sixth of the level of a chest X-ray in one liter of water.

In all cases, the government said the radiation levels were too small to pose an immediate health risk.

But Tsugumi Hasegawa was skeptical as she cared for her 4-year-old daughter at a shelter in a gymnasium crammed with 1,400 people about 80 kilometers (50 miles) from the plant.

"I still have no idea what the numbers they are giving about radiation levels mean. It's all so confusing," said Hasegawa, 29, from the small town of Futuba in the shadow of the nuclear complex. "And I wonder if they aren't playing down the dangers to keep us from panicking. I don't know who to trust."

All six of the nuclear complex's reactor units saw trouble after the disasters knocked out cooling systems. In a small advance, the plant's operator declared Units 5 and 6 — the least troublesome — under control after their nuclear fuel storage pools cooled to safe levels. Progress was made to reconnect two other units to the electric grid and in pumping seawater to cool another reactor and replenish it and a sixth reactor's storage pools.

But the buildup in pressure inside the vessel holding Unit 3's reactor presented some danger, forcing officials to consider venting. The tactic produced explosions of radioactive gas during the early days of the crisis.

"Even if certain things go smoothly, there would be twists and turns," Chief Cabinet Secretary Yukio Edano told reporters. "At the moment, we are not so optimistic that there will be a breakthrough."

Growing concerns about radiation add to the overwhelming chain of disasters Japan has struggled with since the 9.0-magnitude quake. The resulting tsunami ravaged the northeastern coast. All told, police estimates show more than about 18,400 died. More than 15,000 deaths are likely in Miyagi, the prefecture that took the full impact of the wave, said a police spokesman.

"It is very distressing as we recover more bodies day by days," said Hitoshi Sugawara, the spokesman.

Police in other parts of the disaster area declined to provide estimates, but confirmed about 3,400 deaths. Nationwide, official figures show the disasters killing more than 8,600 people, and leaving more than 13,200 people missing, but those two lists may have some overlap.

The disasters have displaced another 452,000, who are living in shelters.

Fuel, food and water remain scarce. The government in recent days acknowledged being caught ill-prepared by an enormous disaster that the prime minister has called the worst crisis since World War II.

Bodies are piling up in some of the devastated communities and badly decomposing even amid chilly rain and snow.

"The recent bodies — we can't show them to the families. The faces have been purple, which means they are starting to decompose," says Shuji Horaguchi, a disaster relief official setting up a center to process the dead in Natori, on the outskirts of the tsunami-flattened city of Sendai. "Some we're finding now have been in the water for a long time, they're not in good shape. Crabs and fish have eaten parts."

Contamination of food and water compounds the government's difficulties, heightening the broader public's sense of dread about safety. Consumers in markets snapped up bottled water, shunned spinach from Ibaraki — the prefecture where the tainted spinach was found — and overall expressed concern about food safety.

Experts have said the amounts of iodine detected in milk, spinach and water pose no discernible risks to public health unless consumed in enormous quantities over a long time. Iodine breaks down quickly, after eight days, minimizing its harmfulness, unlike other radioactive isotopes such as cesium-137 or uranium-238, which remain in the environment for decades or longer.

High levels of iodine are linked to thyroid cancer, one of the least deadly cancers if treated. Cesium is a longer-lasting element that affects the whole body and raises cancer risk.

Rain forecast for the Fukushima area also could further localize the contamination, bringing the radiation to the ground closer to the plant.

Edano tried to reassure the public for a second day in a row. "If you eat it once, or twice, or even for several days, it's not just that it's not an immediate threat to health, it's that even in the future it is not a risk," Edano said. "Experts say there is no threat to human health."

No contamination has been reported in Japan's main food export — seafood — worth about $1.6 billion a year and less than 0.3 percent of its total exports.

Amid the anxiety, there were moments of joy on Sunday. An 80-year-old woman and her teenage grandson were rescued from their flattened two-story house after nine days, when the teen pulled himself to the roof and shouted to police for help.

Other survivors enjoyed smaller victories. Kiyoshi Hiratsuka and his family managed to pull his beloved Harley Davidson motorcycle from the rubble in their hometown of Onagawa. The 37-year-old mechanic said he knows it will never work anymore. "But I want to keep it as a memorial."
___
Yamaguchi reported from Tokyo, as did Associated Press writers Elaine Kurtenbach, Kelly Olsen, Charles Hutzler and Jeff Donn. Associated Press writer Jay Alabaster contributed from Natori, Japan.

Source: http://news.yahoo.com/s/ap/20110321/ap_on_bi_ge/as_japan_earthquake_351

4.5 magnitude earthquake rocks Davao Oriental Town

MANILA, Philippines - The Philippine Institute of Volcanology and Seismology (Phivolcs) recorded a 4.5 magnitude earthquake that hit the vicinity of Mati, Davao Oriental yesterday (March 19) morning.

Phivolcs reported that the tremor happened at around 8:36 a.m. yesterday (March 19) and was said to be tectonic in origin.

There were no monitored intensities. Phivolcs is also not expecting any damages and aftershocks.

The Philippine archipelago is part of the Pacific Ring of Fire where volcanic activities and earthquakes are common.

Source: http://www.philstar.com/Article.aspx?articleId=667796&publicationSubCategoryId=67

Woman, grandson found at earthquake-wrecked home

TOKYO – An 80-year-old woman and her teenage grandson were rescued Sunday in northeastern Japan when the youth was able to pull himself out of their flattened two-story house nine days after the devastating earthquake and tsunami.

Jin Abe, 16, was seen calling out for help from the roof of the collapsed home in the hard-hit city of Ishinomaki, according to the Miyagi Prefectural Police. Like other homes in northeastern Japan, they had lost electricity and telephone service in the March 11 earthquake.

He led them inside to his 80-year-old grandmother, Sumi Abe. Both were conscious but weak, and had survived on the food they had in their refrigerator, said Shizuo Kawamura of the Ishinomaki police department.

The woman could not get out of the house because she has trouble walking, and the teenager, who was suffering from a low body temperature, had been unable until Sunday to pull himself from the wreckage, Kawamura told The Associated Press by telephone.

They were found by local police who realized they couldn't get the woman out of the collapsed house and had to call other rescuers, he said.

National broadcaster NHK showed video of the stunned but coherent woman being placed on a stretcher. She was able to give her name and told rescuers she had been in the house since it collapsed in the quake.

When asked if she was hurt, she said no.

The police said they were trying to learn if there had been other relatives living in the house and their whereabouts.

NHK showed them being taken by helicopter to a hospital.

Kawamura said that while the rescue was a reason for joy, the police had "too many other victims to find to take the time to celebrate."

Source: http://news.yahoo.com/s/ap/20110320/ap_on_re_as/as_japan_earthquake_rescue

Japan tragedy seared into the world's imagination

TOKYO – There are events in history that sear themselves into the world's collective imagination, and enter the realm where myth meets heartbreaking reality.

Japan's tragedy is one of those events. Already, it seems reasonable to surmise it could prove one of the most significant calamities of our time — one that shapes policies, economies, even philosophies for decades to come in an increasingly interconnected world.

There is the sheer, surreal force of the images emerging from afflicted zones: cars perched on rooftops, ships sitting in rice paddies, helicopters in a David-and-Goliath battle against radiation-spewing nuclear reactors.

And the way it haunts us with some of our most basic fears: Death by water. Or rubble. Or nuclear fallout.

Add to that, it's a crisis with an impact that will be felt around the planet: Japan is one of the most advanced countries in the world, its third-largest economy, its most successful car-seller and its second-most generous giver of foreign aid.

"This event has the potential to be the most globally disruptive natural hazard in modern times," said Rob Verchick, a disaster expert at Loyola University in New Orleans. "And it may just be, in the context of globalization, of all time."

The Asian tsunami of 2004 killed more people. The fall of the Twin Towers launched two wars. The collapse of the Berlin Wall spelled the end of an empire.

But in this event, psychological, even philosophical, shock over the confluence of human tragedy and nuclear catastrophe yields some fundamental questions. If a technological power like Japan can be so vulnerable, who's safe? Is even minimal risk, as with nuclear power, too much risk? Do we need to rethink the role of government in protecting the public?

Shaking us from modern-day hubris, we're forced to think about whether even the most advanced societies, with almost obsessively meticulous safety backstops, are still pitifully at the mercy of the elements.

But amid tragedy, Francis Fukuyama, the eminent Stanford philosopher and author of "The End of History and the Last Man," sees the possibility for the crisis to become a galvanizing force for political change in the world.

"It does seem to me a natural disaster like this, because it reminds everybody of how commonly vulnerable they are, could be used as an opportunity to reshape the whole tone and character of politics," Fukuyama told The Associated Press.

The unbelievable sight of rich Japan — famous for trains running like clockwork, state-of-the-art gadgets, concern for safety and order — laid low by a freak force of nature beyond human control has been a terrifying wake-up call. On Friday, Japan's government acknowledged that the triple blow of quake, tsunami and nuclear disaster completely overwhelmed even its elaborately laid out, and fastidiously practiced, emergency response systems.

"The unprecedented scale of the earthquake and tsunami that struck Japan, frankly speaking, were among many things that happened that had not been anticipated under our disaster management contingency plans," said Chief Cabinet Secretary Yukio Edano.

There's another great earthquake that changed the world: Lisbon, 1755. The tsunami-churning temblor flattened the Portuguese city, killed tens of thousands of people, and caused Enlightenment thinkers to re-imagine the role of government and community.

Experts say this crisis could become another historical turning point that may alter mankind's perception of its relationship to the world, and societies' relationship with one another in an age of globalization.

"What the Lisbon earthquake experience contributed to Western history (was) this move of government being responsible to its people and protecting them in a community-driven way," said Verchick. "Is there anything like that that might happen as a result of the Japan tsunami and earthquake and nuclear disaster? I think that the answer is yes. It's related to the idea of global community."

Already the crisis is triggering an urgent rethink of nuclear power around the world, from China to Germany, where pressure is building to sharply accelerate a plan to phase out nuclear energy.

"Fukushima, March 12: 15:36: The End of the Nuclear Age," read the cover of the Germany's prestigious Der Spiegel magazine — referring to the exact time an explosion rocked the Fukushima Dai-ichi nuclear plant where workers are racing to prevent a meltdown.

While the Asian tsunami and last year's earthquake in Haiti triggered an enormous outpouring of worldwide sympathy and aid, the Japan catastrophe is one where people in industrialized countries can more easily see themselves in the victims' shoes.

"One of the things that make this a unique situation is that it is a catastrophic event with incredible terrifying loss that's occurring in a country that is also wealthy," said Verchick, author of the book Facing Catastrophe: Environmental Action for a Post-Katrina World.

Verchick said that in New Orleans, many people who lived through Hurricane Katrina are watching the scenes in Japan with a sense of gut-wrenching familiarity, with some even experiencing symptoms associated with post-traumatic stress disorder.

The Japan tsunami will go down in history as the more significant disaster, according to James Orr, professor of East Asian studies at Bucknell University. Not because of any difference in suffering, but because its effects will be felt around the planet in a more direct way. "Katrina was very much a regional disaster," he said.

And that global punch is given more force from the historic speed with which the images of devastation reached every corner of the planet.

"People all over the world have the ability to almost immediately see the disaster on the ground," said Verchick. "And that actually produces psychological and social changes in people and communities all over the world."

Source: http://news.yahoo.com/s/ap/ap_on_re_as/as_japan_earthquake_global_tragedy

Saturday, March 19, 2011

Japan cites radiation in milk, spinach near plant

FUKUSHIMA, Japan – In the first sign that contamination from Japan's stricken nuclear complex had seeped into the food chain, officials said Saturday that radiation levels in spinach and milk from farms near the tsunami-crippled facility exceeded government safety limits.

Minuscule amounts of radioactive iodine also were found in tap water Friday in Tokyo and elsewhere in Japan — although experts said none of those tests showed any health risks. The Health Ministry also said that radioactive iodine slightly above government safety limits was found in drinking water at one point Thursday in a sampling from Fukushima prefecture, the site of the nuclear plant, but later tests showed the level had fallen again.

Six workers trying to bring the Fukushima Dai-ichi plant back under control were exposed to more than 100 millisieverts of radiation — Japan's normal limit for those involved in emergency operations, according to Tokyo Electric Power Co., which operates the complex. The government raised that limit to 250 millisieverts on Tuesday as the crisis escalated.

Officials said the crisis at the plant appeared to be stabilizing, with near-constant dousing of dangerously overheated reactors and uranium fuel, but the situation was still far from resolved. Japan's military planned to start dousing one troubled reactor — Unit 4 — for the first time shortly after daybreak Sunday morning.

"We more or less do not expect to see anything worse than what we are seeing now," said Hidehiko Nishiyama of the Nuclear and Industrial Safety Agency.

Japan has been grappling with a cascade of disasters unleashed by the 9.0-magnitude earthquake on March 11. The quake spawned a tsunami that ravaged Japan's northeastern coast, killing more than 7,600 people and knocking out cooling systems at the Fukushima Dai-ichi nuclear plant, causing the complex to leak radiation.

More than 11,000 people are still missing, and more than 452,000 are living in shelters.

Chief Cabinet Secretary Yukio Edano, meanwhile, insisted the contaminated foods "pose no immediate health risk."

An expert in the United States also said the risk appeared limited and urged calm.

"The most troubling thing to me is the fear that's out of proportion to the risk," said Dr. Henry Duval Royal, a radiologist at Washington University Medical School.

The tainted milk was found 20 miles (30 kilometers) from the plant, a local official said. The spinach was collected from six farms between 60 miles (100 kilometers) and 75 miles (120 kilometers) to the south of the reactors.

Those areas are rich farm country known for melons, rice and peaches, so the contamination could affect food supplies for large parts of Japan.

More tests was being done on other foods, Edano said, and if they show further contamination, then food shipments from the area would be halted.

Officials said it was too early to know if the nuclear crisis caused the contamination, but Edano said air sampling done near the dairy showed higher-than-normal radiation levels.

Iodine levels in the spinach exceeded safety limits by three to seven times, a food safety official said. Tests on the milk done Wednesday detected small amounts of iodine-131 and cesium-137. High levels of iodine are linked to thyroid cancer, one of the least deadly cancers if treated. Cesium is a longer-lasting element that affects the whole body and raises cancer risk. But only iodine was detected Thursday and Friday, a Health Ministry official said.

After the announcements, Japanese officials immediately tried to calm an already-jittery public, saying the amounts detected were so small that people would have to consume unimaginable amounts to endanger their health.

"Can you imagine eating one kilogram of spinach every day for one year?" said State Secretary of Health Minister Yoko Komiyama. One kilogram is a little over two pounds.

Edano said someone drinking the tainted milk for one year would consume as much radiation as in a CT scan; for the spinach, it would be one-fifth of a CT scan. A CT scan is a compressed series of X-rays used for medical tests.

The Health Ministry said iodine levels slightly above the safety limit were discovered Thursday in drinking water samples from Fukushima prefecture. On Friday, levels were about half that benchmark; by Saturday, they had fallen further.

Drinking one liter of water with the iodine at Thursday's levels is the equivalent of receiving one-eighty-eighth of the radiation from a chest X-ray, said Kazuma Yokota, a spokesman for the prefecture's disaster response headquarters.

The trace amounts of iodine were found in Tokyo's water on Friday, the first day since the government ordered nationwide daily sampling due to the nuclear crisis, the Ministry of Education, Culture, Sports, Science and Technology said. A ministry statement said the amounts found did not exceed government safety limits. But tests on water, which for decades were only done once a year, usually show no iodine.

At the Fukushima plant, emergency workers have been struggling to cool the reactors and the pools used to store used nuclear fuel, as well as to put the facility back on the electricity grid.

A replacement power line reached the complex Friday, but workers needed 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. Company officials hoped to be able to switch on the cooling systems Sunday.

Once the power is reconnected, it is not clear if the cooling systems will still work.

A fire truck with a high-pressure cannon pumped water directly from the ocean into one of the most troubled areas of the complex — the cooling pool for used fuel rods at the plant's Unit 3 — in a 13-hour operation that ended in the early morning hours Sunday. Because of high radiation levels, firefighters only went to the truck every three hours to refuel it.

Holes were also punched in the roofs of units 5 and 6 to vent buildups of hydrogen gas, and the temperature in Unit 5's fuel storage pool dropped after new water was pumped in, according to officials with Tokyo Electric Power Co., which owns the complex.

More workers were thrown into the effort — bringing the total at the complex to 500 — and the safety threshold for their radiation exposure was raised 2 1/2 times so they could keep working.

Officials insisted that would cause no health damage.

Edano said conditions at the reactors in Units 1, 2 and 3 — all of which have been rocked by explosions in the past eight days — had "stabilized."

The reactors and the storage pools both need constant sources of cooling water. Even when they are taken from reactors, uranium rods remain very hot and must be cooled for months, possibly longer, to prevent them from heating up again and emitting radioactivity.

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.

People evacuated from around the plant, along with some emergency workers, have tested positive for radiation exposure. Three firefighters needed to be decontaminated with showers, while among the 18 plant workers who tested positive, one absorbed about one-tenth of the amount that could induce radiation poisoning.

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 since the quake with his wife, Junko, and their children.

"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.

The government conceded Friday that it was slow to respond to the crisis and welcomed ever-growing help from the U.S. in hopes of preventing a complete meltdown.

Nishiyama, of the nuclear safety agency, also said backup power systems at the plant had been improperly protected, leaving them vulnerable to the tsunami.

The failure of Fukushima's backup power systems, which were supposed to keep cooling systems going in the aftermath of the 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 said that while the generators 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.

Spokesman Motoyasu Tamaki also acknowledged that the complex was old, and might not have been as well-equipped as newer facilities.

The crisis has led to power shortages and factory closures, and triggered a plunge in Japanese stock prices.

On Saturday evening, Japan was rattled by 6.1-magnitude aftershock, with an epicenter just south of the troubled nuclear plants. The temblor, centered 150 kilometers (90 miles) northeast of Tokyo, shook buildings in the capital.

___
Yuasa reported from Tokyo, as did Associated Press writers Mari Yamaguchi, Elaine Kurtenbach, Tim Sullivan, Joji Sakurai, and Jeff Donn.

Source: http://news.yahoo.com/s/ap/ap_on_bi_ge/as_japan_earthquake