Five months later, the massive earthquake and tsunami in Japan crippled the Fukushima Daiichi nuclear plant.
Friday's breakdown at the Fukushima Daiichi nuclear plant lasted around three hours, Tepco said.
Nuclear energy is unpopular, to put it mildly, following the disaster at Fukushima Daiichi.
So it shares the responsibility for the problems caused by the Fukushima Daiichi plant.
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The radiation crisis at the Fukushima Daiichi nuclear plant has also compounded its problems.
The resulting crisis at the Fukushima Daiichi plant is the world's worst nuclear accident in a generation.
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Japan's ageing Fukushima Daiichi reactor failed dramatically in early 2011 when hit by both these natural forces.
Engineers are racing to avert a nuclear catastrophe at Fukushima Daiichi, badly damaged by Friday's quake and tsunami.
This followed radiation leaks at the Fukushima Daiichi nuclear plant which was damaged by the earthquake and tsunami.
After the Fukushima Daiichi meltdown, the country has imported more LNG to offset the loss in atomic power generation.
According to Tokyo Electric Power Company (TEPCO), workers at the Fukushima Daiichi (FDI) nuclear power plant have been evacuated.
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The SARRY system at the Fukushima Daiichi plant is its first large-scale application.
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But the Fukushima Daiichi Nuclear Power Plant was incapable of withstanding the earthquake and tsunami that hit on that day.
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From a communications perspective, the challenge facing the nuclear energy industry goes beyond the specifics of the Fukushima Daiichi meltdowns.
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Japanese officials point out that radiation released from Fukushima Daiichi is still only about 15% of what was emitted at Chernobyl.
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The pools store runoff water from the rickety, cumbersome system Tepco threw together after the accident, to cool Fukushima Daiichi's reactors.
At the Fukushima Daiichi plant, cooling systems failed in the aftermath of an earthquake and tsunami when electrical power was lost.
The company's factory in Kasukabe, Saitama prefecture, on the outskirts of Tokyo is about 120 miles from the Fukushima Daiichi plant.
Japan's Fukushima Daiichi nuclear-power plant sustained its worst power outage since a blackout in 2011 sent its reactors spinning out of control.
The 20-kilometer (12.5 miles) evacuation zone surrounding the Fukushima Daiichi (FDI) nuclear power plant will be expanded, Japanese government officials announced today.
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The same holds true in Japan prior to the Fukushima Daiichi disaster.
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The leaky reservoirs show how challenging the situation at Fukushima Daiichi is.
The reactor buildings and equipment at Fukushima Daiichi also are damaged and leaking radioactive water, something that didn't happen at Three Mile Island.
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Radiation levels for miles around the Fukushima Daiichi nuclear plant in Japan are at dangerous levels and the crisis is not yet over.
He says he is even readying a proposal for a solar facility inside the contaminated no-go zone around the Fukushima Daiichi nuclear plant.
One preschooler showed off a dosimeter worn around her neck, a requirement for children in Nihonmatsu and other places relatively close to Fukushima Daiichi.
The move comes 11 months after a tsunami in Japan wrecked the Fukushima Daiichi nuclear plant, leaking radioactive material into the air and sea.
The crisis at the Fukushima Daiichi complex now threatens three of six reactors and four of seven pools in which nuclear waste is stored.
Such a decision would be the first since the 2011 Fukushima Daiichi nuclear disaster, which has led to a nation-wide review of nuclear safety standards.
The Japanese government reported today that radiation levels are dangerously high inside Units 1 and 3 at the Fukushima Daiichi nuclear power plant (FDI).
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