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Nuclear reactors in highly populated areas and high seismic hazards zones / Thomas B. Cochran, National Ressources Defense Council, EU energy policy blog, 25/11/2011http://www.energypolicyblog.com/2011/11/25/nuclear-reactors-in-highly-populated-areas-and-high-seismic-hazards-zones/Immediately following the earthquake and tsunami residents within 20 kilometers (km) (12. 4 miles) of Fukushima Dai-ichi were evacuated and those between 20 and 30 km (12.4 to 18.6 miles) were advised to remain in their homes as shelter or voluntarily evacuate. Subsequently, the Japanese government considered extending the evacuation zone to 30 km but ended up establishing a 20 milli-Sievert per year (mSv/y) or 2 rem/y dose limit for establishing which areas would be evacuated...