![]() Following the accident, at least 164,000 residents of the surrounding area were permanently or temporarily displaced (either voluntarily or by evacuation order). : 106 Criticisms have been made about the public perception of radiological hazards resulting from accidents and the implementation of evacuations (similar to the Chernobyl nuclear accident), as they caused much more harm than they prevented. No adverse health effects among Fukushima residents or power station workers have been documented that are directly attributable to radiation exposure from the accident. The accident was rated seven (the maximum severity) on the INES by NISA, following a report by the JNES. The subsequent inability to sufficiently cool reactors after shutdown compromised containment and resulted in the release of radioactive contaminants into the surrounding environment. 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 sources. The Fukushima nuclear accident was a major nuclear accident at the Fukushima Daiichi nuclear power plant in Ōkuma, Fukushima, Japan which began on March 11, 2011. Excess steam from the drywell enters the wetwell water pool via downcomer pipes. WW: wetwell – torus-shaped all around the base enclosing steam suppression pool. For other 2011 Japanese nuclear accidents/incidents, see Fukushima Daini Nuclear Power Plant, Onagawa Nuclear Power Plant, Tōkai Nuclear Power Plant, and Rokkasho Reprocessing Plant.Ĭross-section of a typical BWR Mark I containment as used in units 1 to 5.ĭW: drywell enclosing reactor pressure vessel ![]() For the preceding earthquake and tsunami, see 2011 Tōhoku earthquake and tsunami. "2011 Japanese nuclear accidents" redirects here.
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