The impact of Fukushima nuclear disaster is greater than most people think

However, researcher Nikolaos Evangeliou said: "We don't need to worry."

The research team of Nikolaos Evangeliou, of the Norwegian Aviation Research Institute, first surveyed the amount of global radioactivity caused by incidents at three Fukushima-Daiichi nuclear plant nuclear reactors in Japan after one The tsunami occurred in 2011.

They calculated the exposure of people on Earth to two radioisotopes. It is known that most of the data is taken from radiation monitoring in the environment using a network of global gauges recently by the CTBTO Comprehensive Nuclear Test Ban Treaty (Comprehensive Nuclear-Test) -The Treaty Organization.

The amount of radiation that most individuals receive is 0.1 millisievert.

Since then, the scientific team found that each of us received more radiation after the disaster.

However, Nikolaos Evangeliou said: "We do not need to worry . " "More than 80% of the radiation is stored in the ocean and poles, so I think the population , " said the researcher at the annual meeting of the European Geographic Union in Vienna, Austria. the least exposed world '.

He also estimated that the radiation that most individuals receive is 0.1 millisievert.(Sievert: unit measuring the amount of ionizing radiation absorbed has the effect of damaging the international measurement standards).

Even in Japan, human radiation is low, only 0.5 millisieverts - close to the recommended annual limit for breathing natural radon gas (radon is a natural air pollutant, entered into buildings through cracks and small holes in the ground . causing lung cancer.

Not surprisingly, residents in Fukushima and surrounding areas for the first 3 months of the accident suffered between 1 and 5 millisieverts. However, such radiation is still relatively low. For example, a typical CT scan produces 15 millisieverts, while it must reach 1,000 millisieverts to cause radiation.

Even in Japan, radiation on people is low, only 0.5 millisieverts.

But Evangeliou said the effects on surrounding wildlife may be more serious. He revealed the increased levels of radiation around Fukushima in relation to the decline in the number of birds from mid-2011 to 2014.

"There are also reports of other species such as insects and some mammals," he said.

Overall, however, Evangeliou judged that the risks posed by the Chernobyl nuclear accident in Ukraine in 1986 were still much greater than those in Fukushima, because the collapse was greater and accidents occurred in more densely populated areas.