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.
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The reactors at Fukushima-Daiichi are called boiling-water reactors (BWRs) and were manufactured by General Electric.
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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.
Acquisitions often go wrong, too: Daiichi Sankyo must surely regret paying so much for Ranbaxy.
Almost immediately after Daiichi Sankyo acquired a majority stake in Ranbaxy, problems sprang up.
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The resulting crisis at the Fukushima Daiichi plant is the world's worst nuclear accident in a generation.
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The designers of the reactors at Fukushima-Daiichi had anticipated situations where pressure was rising in the core.
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Analysts said that with Daiichi now holding a majority 64% stake in Ranbaxy, Singh's departure was inevitable.
The Daiichi plant does expose its workers to more radiation than other plants, the regulatory documents show.
Japan's ageing Fukushima Daiichi reactor failed dramatically in early 2011 when hit by both these natural forces.
As the owner of Ranbaxy, Daiichi Sankyo now shares interests with other foreign makers of generic drugs.
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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.
Daiichi Sankyo is developing edoxaban, and Merck and partner Portola have an interesting candidate, but its years behind.
As a result, Takeda, Astellas and Daiichi Sankyo all expect a steep drop in operating profits this year.
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After the Fukushima Daiichi meltdown, the country has imported more LNG to offset the loss in atomic power generation.
Daiichi acquired a majority stake in Ranbaxy, a generic drug maker, in 2008.
But the Sankyo-Daiichi deal is seen partly as a way to prevent a Western firm from scooping them up.
According to Tokyo Electric Power Company (TEPCO), workers at the Fukushima Daiichi (FDI) nuclear power plant have been evacuated.
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You'd have thought he compared Fenway to the quake-struck Fukushima Daiichi nuke plant.
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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Solid nuclear fuel like that used at Fukushima-Daiichi can melt and release radioactive materials if not cooled consistently during shutdown.
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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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"Daiichi Sankyo is currently pursuing its available legal remedies and cannot comment further on the subject at this time, " it added.
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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