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» Evacuation Orders and Restricted Areas

In this page, transition of evacuation orders and restricted areas are explained in chronological order. To know the current status of the area, please click here.

■ Evacuation orders

Immediately after the accident, the government ordered residents in only 3km radius around the Fukushima Daiichi Nuclear Power plant (Here after referred as NPP) to evacuate on Mar.11, 2011. As the seriousness of the accident became apparent, the areas of evacuation order were gradually expanded. On March 12, 2011, after the 1st explosion at the nuclear reactor No.1, the government expanded the areas of evacuation within 20km radius from Nuclear Power Plant. On March 15, after the sound what was believed to be explosion was heard at the reactor No.2 & No.4, the government instructed the residents living between 20km-30km radius from the NPP to stay inside house. As the result of System for Prediction of Environmental Emergency Dose Information (SPPEDI) was still not reflected at this point, many people did not know that the wind and the rain on March 15th brought radioactive particles to spread northwest direction from the NPP.

■ Restricted areas

On April 22, 2011, the government designated the 20km radius around the NPP as a restricted area and prohibited entry into the area excluding those engaged in emergency response.

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Map: Restricted areas (Apr.22, 2011-)

Source: Briefing material for technical workshop on the accident at Fukushima dai-ichi nuclear power station, TEPCO by Cabinet Office, Japan, Support Team for Residents Affected by Nuclear Incidents At the same time, the government designated 2 more different areas, “deliberate evacuation areas” and “evacuation prepared areas in case of emergency”.

■ Delibarate evacuation area and Specific Spots Recommended for Evacuation

“Deliberate evacuation areas” were designated as the area excluding restricted area where the annual cumulative dose of radiation was expected to reach 20mSv/year after the accident. Residents lived in this areas required to evacuate within about a month to reduce the risk of being exposed to radioactive materials, though the instruction was too late. In addition, ‘Specific Spots Recommended for Evacuation(SSRE)’ was set on June 16, 2011 referring to the areas which contain high radioactive contamination, including numerous hot spots. The defined level of radiation in the SSRE suggests the cumulative dose equivalent to 20mSv/y or higher.

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Map: Deliberate evacuation areas (Apr.22, 2011-)

Source: Briefing material for technical workshop on the accident at Fukushima dai-ichi nuclear power station, TEPCO by Cabinet Office, Japan, Support Team for Residents Affected by Nuclear Incidents

■ Evacuation prepared areas in case of emergency

“Evacuation prepared areas in case of emergency” was designated as the areas excluding deliberate evacuation areas, among the areas of in-house evacuation on April 22, 2011. The residents are required to remain prepared to move out of the areas or in-house evacuation in case of emergency regarding the NPP. On September 30, 2011, the areas were lifted.

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Map: Evacuation prepared areas in case of emergency (Apr.22-Sep.30, 2011)

Source: Briefing material for technical workshop on the accident at Fukushima dai-ichi nuclear power station, TEPCO by Cabinet Office, Japan, Support Team for Residents Affected by Nuclear Incidents

■ Rearranging the restricted areas and areas to which evacuation orders have been issued

The government decided to rearrange the restricted areas and areas to which evacuation orders have been issued after “the safety of the NPS was ensured” by completion of Step 2 on December 26, 2011. According to their plan, the restricted areas will be lifted after considering the period for preparing tasks such as confirmation of infrastructure and security. The areas to which evacuation orders have been issued will be rearranged into 3 areas responding to the annual cumulative dose.

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Map: Restricted areas and deliberate evacuation zone (Sep.30, 2011)

Source: Briefing material for technical workshop on the accident at Fukushima dai-ichi nuclear power station, TEPCO by Cabinet Office, Japan, Support Team for Residents Affected by Nuclear Incidents

■ 3 areas to be arranged

In March 2012, the government decided to rearrange the areas to which evacuation orders have been issued into 3 areas as follows. Practical operations for designating areas to which evacuation orders have been issued as newly designated areas By Ministry of Economy, Trade and Industry practical_operations_for_designating_areas

■ Current status of the areas

The government is gradually lifting evacuation orders in Area 1 (green area <20mSv/year).

20130807_assistance

August 7, 2013

 

Evacuation zone map_141001

October 1, 2014

Evacuation zone 150905

September 5, 2015
Source: Ministry of Economy, Trade and Industry 

 


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