The events - from the earthquake to the hydrogen explosions in the reactor units - are described below:Ī magnitude 9 earthquake disabled the external power supply for the Fukushima Daiichi power plant site. At the time of the earthquake, units 1-3 of the plant were in operation, and unit 4 was undergoing overhaul. There are six reactor units at the Fukushima Daiichi nuclear power plant. Apart from Chernobyl, the catastrophic accident in Fukushima is the only one to be classified as a level 7 accident, which is the highest level on the International Nuclear and Radiological Event Scale (INES).Įpicentre of the submarine earthquake Source: BASE This triggered a series of accidents at the Fukushima Daiichi nuclear power plant, with nuclear meltdowns in three reactor blocks.Īs a result, significant amounts of radionuclides were released into the environment. On the afternoon of 11 March 2011, an earthquake in the Pacific Ocean caused a tsunami that hit the east coast of Japan. The most important findings and information are summarised on this page. The technical report provides detailed answers to these questions. What caused the catastrophic accident? What were the consequences for Japan? And how did the events of 11 March 2011 change the world? BASE has published a technical report on the anniversary of the accident:ġ0 years after Fukushima. ![]() Ten years ago, news from Japan shocked the world: the natural disaster of a tsunami was followed by the nuclear disaster of Fukushima. Fukushima ten years later: The catastrophic accident and its consequences
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