Higashidōri no relation Fukushima Daiichi nuclear disaster
Nuclear power plants
The Fukushima Daiichi, Fukushima Daini, Onagawa Nuclear Power Plant and Tōkai nuclear power stations, consisting of a total eleven reactors, were automatically shut down following the earthquake. Higashidōri, also on the northeast coast, was already shut down for a periodic inspection. Cooling is needed to remove decay heat after a Generation II reactor has been shut down, and to maintain spent fuel pools. The backup cooling process is powered by emergency diesel generators at the plants and at Rokkasho nuclear reprocessing plant. At Fukushima Daiichi and Daini, tsunami waves overtopped seawalls and destroyed diesel backup power systems, leading to severe problems at Fukushima Daiichi, including three large explosions and radioactive leakage. Subsequent analysis found that many Japanese nuclear plants, including Fukushima Daiichi, were not adequately protected against tsunamis. Over 200,000 people were evacuated.The discharge of radioactive water in Fukushima were confirmed in later analysis at the three reactors at Fukushima I (Units 1, 2, and 3), which suffered meltdowns and continued to leak coolant water.The aftershock on 7 April caused the loss of external power to Rokkasho Reprocessing Plant and Higashidori Nuclear Power Plant but backup generators were functional. Onagawa Nuclear Power Plant lost three of its four external power lines and temporarily lost cooling function in its spent fuel pools for "20 to 80 minutes". A spill of "up to 3.8 litres" of radioactive water also occurred at Onagawa following the aftershock. A report by the IAEA in 2012 found that the Onagawa Nuclear Power Plant had remained largely undamaged.In 2013, only two nuclear reactors in Japan had been restarted since the 2011 shutdowns. In February 2019, there were 42 operable reactors in Japan. Of these, only nine reactors in five power plants were operating after having been restarted post-2011.
no relation