On April 17, TEPCO finally announced a " roadmap to restoration," which the company said would stabilize the plant and end most radioactive emissions within nine months. (TEPCO) confirmed the obvious, and announced that at least four of the plant's reactors would never go back into service. In the third week, further discoveries of highly radioactive water outside the reactor buildings showed that the contamination was spreading. But an accident that exposed three workers to radioactive water highlighted the continued danger, and made it clear that the process of stabilizing and cleaning up the plant will be a long slog. The second week showed signs of progress, as the plant operators worked to reconnect the plant to the electricity grid and get cooling systems working again. 4, which was shut down at the time of the earthquake, raised a new set of concerns regarding spent nuclear fuel.Īs the first week of the nuclear crisis came to a close, the spent fuel had become the primary safety concern. ![]() Fires at the building housing reactor No. 3 in the days following the March 11 earthquake and tsunami, and troubling problems next arose in reactor building No. Explosions first occurred in the buildings housing reactors No. The eyes of the world have been riveted on Japan's Fukushima Dai-1 nuclear power plant and its workers' desperate efforts to stabilize the nuclear reactors. This explainer was last updated on May 13. ![]() Editor's Note: This is part of IEEE Spectrum's ongoing coverage of Japan's earthquake and nuclear emergency.
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