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By 21 March 2011, Toshiba had sent a 100-strong team to two Fukushima plants as part of a task-force of 700 Toshiba workers organized at Toshiba's Isogo Engineering Centre to defuse the nuclear crisis, and Hitachi had dispatched 120 to Fukushima I and formed a 1000-strong task force. [36] [37]
The Fukushima nuclear accident was a major nuclear accident at the Fukushima Daiichi Nuclear Power Plant in Ōkuma, Fukushima, Japan, which began on 11 March 2011. The proximate cause of the accident was the 2011 Tōhoku earthquake and tsunami , which resulted in electrical grid failure and damaged nearly all of the power plant's backup energy ...
The bombings killed between 150,000 and 246,000 people, most of whom were civilians, and they remain the only use of nuclear weapons in an armed conflict. Japan surrendered to the Allies on 15 August, six days after the bombing of Nagasaki and the Soviet Union's declaration of war against Japan and invasion of Japanese-occupied Manchuria.
The ongoing Fukushima crisis may spell the end of nuclear power in Japan, as "citizen opposition grows and local authorities refuse permission to restart reactors that have undergone safety checks". Local authorities are skeptical that sufficient safety measures have been taken and are reticent to give their permission – now required by law ...
Japan's Nuclear and Industrial Safety Agency (NISA) stated 33% of the fuel rods were damaged, in news reports the morning of 16 March. [31] In the week that followed concerns were raised over a possible breach from the explosion at either the suppression pool, or the reactor vessel.
Nuclear Engineering International reported that all four units were successfully automatically shut down, but emergency diesel generators at the site were out of order. [10] People were evacuated around 10 kilometres (6.2 mi) from the plant, due to possible radioactive contamination .
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On 12 May, TEPCO engineers confirmed that a meltdown occurred, with molten fuel having fallen to the bottom of the reactor's pressure vessel, or RPV. [40] The utility said that fuel rods of the No. 1 reactor are fully exposed, with the water level 1 meter (3.3 feet) below the base of the fuel assembly.