Nuclear plant operators trying to avoid complete reactor meltdowns said Thursday that they were close to finishing a new power line that could end Japan's crisis.
Yet, several ominous signs have also emerged: a surge in radiation levels, unexplained white smoke and spent fuel rods that U.S. officials said might be on the verge of spewing more radioactive material.
As fear, confusion and unanswered questions swirled around the Fukushima Dai-ichi complex, and Japan suffered myriad other trials from last week's earthquake and tsunami believed to have killed more than 10,000, its emperor took the unprecedented step of directly addressing his country on camera, urging his people not to give up.
"It is important that each of us shares the difficult days that lie ahead," Akihito said Wednesday. "I pray that we will all take care of each other and overcome this tragedy."
The 77-year-old emperor expressed his own deep concern about the "unpredictable" nuclear crisis. "With the help of those involved I hope things will not get worse," he said.
U.S. Nuclear Regulatory Commission Chairman Gregory Jaczko said at a congressional hearing in Washington that all the water is gone from the spent fuel storage pond of Fukushima Dai-ichi's Unit 4 reactor, but Japanese officials denied it. Hajime Motojuku, a spokesman for plant operator Tokyo Electric Power Co., said the "condition is stable" at Unit 4.
Earlier, however, another utility spokesman said officials' greatest concerns were the spent fuel pools, which lack the protective shells that reactors have.
Japanese officials raised hopes of easing the crisis, saying early Thursday that they may be close to bringing power back to the plant and restoring the reactors' cooling systems. The earthquake and tsunami knocked out power and ruined backup generators.
The new power line would revive electric-powered pumps, allowing the company to control the rising temperatures and pressure that have led to at least partial meltdowns in three reactors. The company is also trying to repair its existing disabled power line.
Tokyo Electric Power spokesman Naoki Tsunoda said the new power line to the Fukushima Dai-ichi plant is almost finished and that officials plan to try it "as soon as possible," but he could not say exactly when.
About 180 emergency workers have been working in shifts to manually pump seawater into the overheating reactors to cool them and stave off complete meltdowns. They were emerging as heroes as their sacrifices became clearer, and as they stepped into circumstances in which no radiation suit could completely protect them.
Japan's health ministry made what it described as an "unavoidable" change Wednesday, more than doubling the amount of radiation to which the workers can be legally exposed.
"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 the University of Tokyo Hospital.
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Yet, several ominous signs have also emerged: a surge in radiation levels, unexplained white smoke and spent fuel rods that U.S. officials said might be on the verge of spewing more radioactive material.
As fear, confusion and unanswered questions swirled around the Fukushima Dai-ichi complex, and Japan suffered myriad other trials from last week's earthquake and tsunami believed to have killed more than 10,000, its emperor took the unprecedented step of directly addressing his country on camera, urging his people not to give up.
"It is important that each of us shares the difficult days that lie ahead," Akihito said Wednesday. "I pray that we will all take care of each other and overcome this tragedy."
The 77-year-old emperor expressed his own deep concern about the "unpredictable" nuclear crisis. "With the help of those involved I hope things will not get worse," he said.
U.S. Nuclear Regulatory Commission Chairman Gregory Jaczko said at a congressional hearing in Washington that all the water is gone from the spent fuel storage pond of Fukushima Dai-ichi's Unit 4 reactor, but Japanese officials denied it. Hajime Motojuku, a spokesman for plant operator Tokyo Electric Power Co., said the "condition is stable" at Unit 4.
Earlier, however, another utility spokesman said officials' greatest concerns were the spent fuel pools, which lack the protective shells that reactors have.
Japanese officials raised hopes of easing the crisis, saying early Thursday that they may be close to bringing power back to the plant and restoring the reactors' cooling systems. The earthquake and tsunami knocked out power and ruined backup generators.
The new power line would revive electric-powered pumps, allowing the company to control the rising temperatures and pressure that have led to at least partial meltdowns in three reactors. The company is also trying to repair its existing disabled power line.
Tokyo Electric Power spokesman Naoki Tsunoda said the new power line to the Fukushima Dai-ichi plant is almost finished and that officials plan to try it "as soon as possible," but he could not say exactly when.
About 180 emergency workers have been working in shifts to manually pump seawater into the overheating reactors to cool them and stave off complete meltdowns. They were emerging as heroes as their sacrifices became clearer, and as they stepped into circumstances in which no radiation suit could completely protect them.
Japan's health ministry made what it described as an "unavoidable" change Wednesday, more than doubling the amount of radiation to which the workers can be legally exposed.
"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 the University of Tokyo Hospital.
Read more