Disaster-related deaths are in addition to the about 19,500 that were killed by the earthquake or tsunami. Official figures show that there have been 2313 disaster-related deaths among evacuees from Fukushima prefecture.Government nervousness has delayed the return of many. There have been no deaths or cases of radiation sickness from the nuclear accident, but over 100,000 people were evacuated from their homes as a preventative measure.This task became newsworthy in August 2013. Apart from cooling, the basic ongoing task was to prevent release of radioactive materials, particularly in contaminated water leaked from the three units.Official 'cold shutdown condition' was announced in mid-December. After two weeks, the three reactors (units 1-3) were stable with water addition and by July they were being cooled with recycled water from the new treatment plant.All four Fukushima Daiichi reactors were written off due to damage in the accident – 2719 MWe net.The accident was rated level 7 on the International Nuclear and Radiological Event Scale, due to high radioactive releases over days 4 to 6, eventually a total of some 940 PBq (I-131 eq).All three cores largely melted in the first three days. Following a major earthquake, a 15-metre tsunami disabled the power supply and cooling of three Fukushima Daiichi reactors, causing a nuclear accident beginning on 11 March 2011.
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