Japan announced a simulation of the range of radioactive emissions

On October 24, the Japan Nuclear Regulatory Commission (NRA) announced a simulation of the scope of radioactive dispersal for areas that need to be evacuated in the event of a similar incident. at the Fukushima 1 nuclear power plant at all 16 of the country's nuclear power plants.

According to the above simulation, the amount of radioactive material released within a week after the incident at the Kashiwazaki-Kariwa nuclear power plant of Tokyo Electric Power Company (TEPCO) in Niigata Prefecture could reach the population level in the area. 40km radius from nuclear power plant must be evacuated.

Radioactivity can reach 100mSv in Uonuma City, Niigata Prefecture, about 40.2km from Kashiwazaki-Kariwa nuclear power plant, assuming all 7 of the plant's nuclear reactors are melted.

Kashiwazaki-Kariwa nuclear power plant

Radioactivity can be up to 100mSv at locations 30km away from the Hamaoka nuclear power plant of Chubu Electric Company in Shizuoka Prefecture, Kansai Electric Oi nuclear power plant in Fukui prefecture and Fukushima 2 nuclear power plant in Fukushima Prefecture of TEPCO.

However, the NRA notes that these simulations should only be used as a 'guide' to the potential of dispersal of radioactive material because they do not take into account the topographic factors in the surrounding areas. Nuclear power plants or changes in wind direction.

Local governments can use this as a reference to prepare a plan for the incident at the nuclear power plant.

The International Atomic Energy Agency (IAEA) called for evacuation of people when radioactive concentrations exceeded 100mSv for the first 7 days after the nuclear incident. The NRA has a plan to introduce the idea of 'cautious action areas' and 'emergency protection action plan areas' according to IAEA standards in new guidelines that will be completed after 1 month based on lessons. drawn from the Fukushima incident 1.

The 'cautious action zone' , where residents will be asked to evacuate immediately after the nuclear incident, lies within a 5km radius, while the 'emergency protection action plan area' is where people will being asked to prepare for evacuation depends on the situation and within a 30km radius.

Local authorities will determine the actual scope of the regions, but some local government officials have requested more detailed explanations of the above simulations.