Workers were close to restoring power to a nuclear plant's overheating reactors Sunday as the toll of dead or missing from Japan's worst natural disaster in nearly a century neared 21,000. Amid the devastation on the north-east coast left by a massive quake and tsunami, police reported an astonishing tale of survival with the discovery of an 80-year-old woman and her 16-year-old grandson alive under the rubble.
"Their temperatures were quite low but they were conscious. Details of their condition are not immediately known. They have been already rescued and sent to hospital," a spokesman for the Ishinomaki police department said.
They were in the kitchen when their house collapsed but the teenager was able to reach food from the refrigerator, helping them survive for nine days, broadcaster NHK quoted rescuers as saying.
But with half a million tsunami survivors huddled in threadbare, chilly shelters and the threat of disaster at the Fukushima No 1 nuclear plant stretching frayed nerves, the mood in the world's third-biggest economy remained grim.
Food contaminated with radiation was found for the first time outside Japan - where milk and spinach have already been tainted by a plume from Fukushima - as Taiwan detected radioactivity in a batch of imported Japanese fava beans.
The discovery of traces of radioactive iodine in Tokyo tap water, well to the south-west of the crippled atomic power plant on the Pacific coast, compounded public anxiety but authorities said there was no danger to health.
The Fukushima plant was struck on March 11 by a 9.0-magnitude earthquake and tsunami which, with 8,199 people confirmed killed, is Japan's deadliest natural disaster since the Great Kanto quake levelled much of Tokyo in 1923.
Another 12,722 are missing, feared swept out to sea by the 10-metre (33-foot) tsunami or buried in the wreckage of buildings. In Miyagi prefecture on the north-east coast, where the tsunami reduced entire towns to splintered matchwood, the official death toll stood at 4,882, but the police chief warned that the number could eventually rise to 15,000.
Cooling systems that are meant to protect the Fukushima plant's six reactors from a potentially disastrous meltdown were knocked out by the massive waves, and engineers have since been battling to control rising temperatures.
Radiation-suited crews were striving to restore electricity to the ageing facility 250 kilometres (155 miles) north-east of Tokyo, after extending a high-voltage cable into the site from the national grid.
Engineers were checking the cooling and other systems at reactor No 2 late Sunday, aiming to restore the power soon, operator Tokyo Electric Power Co (TEPCO) said.
An external electricity supply has been restored to the distributor but power at the reactor unit was not yet back, spokesman Naohiro Omura said.
"It will take more time. It's not clear when we can try to restore the systems," he said.
Fire engines earlier aimed their water jets at the reactors and fuel rod pools, where overheating is an equal concern, dumping thousands of tonnes of seawater from the Pacific.
"Our desperate efforts to prevent the situation worsening are making certain progress," said chief government spokesman Yukio Edano.
"But we must not underestimate this situation, and we are not being optimistic that things will suddenly improve," he told a news conference.
Defence Minister Toshimi Kitazawa said the temperature in all spent fuel-rod pools at the facility had dropped below 100 degrees Celsius (212 degrees Fahrenheit) - suggesting water cooling operations were having some effect.
Authorities said reactors five and six at the Fukushima complex meanwhile were in "stable condition" on Sunday, Kyodo News reported.
Six workers at the plant have been exposed to high levels of radiation but are continuing to work and have suffered no health problems, TEPCO said.
Prime Minister Naoto Kan was to visit a staging ground for the Fukushima relief efforts on Monday, as well as the city of Ishinomaki, where the two survivors were found on Sunday, officials said.
According to the charity Save the Children, around 100,000 children were displaced by the quake and tsunami, and signs of trauma are evident among young survivors as the nuclear crisis and countless aftershocks fuel their terror.
"We found children in desperate conditions, huddling around kerosene lamps and wrapped in blankets," Save the Children spokesman Ian Woolverton said after visiting a number of evacuation centres in Japan's north-east.
"They told me about their anxieties, especially their fears about radiation," Woolverton said, adding that several youngsters had mentioned the US atom bomb attacks on Hiroshima and Nagasaki, which they know from school.
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