What are the most radioactive places in the world?

We associate radiation with nuclear power plants, but in many places people are affected by radiation naturally, from minerals and other chemical elements. We bring you the 5 most radioactive natural sites in the world.

Due to the fact of living on Earth, we are receiving certain amounts of radiation (millisieverts) per year depending on the area where we live.

To understand it better it is important to know what a sievert (Sv) is. It is a unit of measure that expresses the effective dose that marks the health risk of any combination of radiation. The average annual radiation exposure in the world is 2.4 millisieverts, although it can range up to 10 mSv.

Therefore, throughout life, they accumulate from 100 to 700 mSv. A dose of 6 sieverts causes death in 14 days to 90% of people and below 0.25 sievert it is considered that there are no consequences.

But, in which areas are we receiving higher doses naturally?

We go to the coast of the Caspian Sea to find Ramsar, an area of ​​Iran that has exposure levels 80 times higher than normal. The average dose of radiation received by a person living in Ramsar for a year is 300 mSv and comes from natural underground radioactive elements that are released through natural hot springs.

The culprit that this area of ​​southern China is one of the most radioactive on the planet is again the monacita. On this occasion, the inhabitants of Yangjiang built their homes in the past using sand that contained monacite without knowing what this would make their homes radioactive.

The monacita and thorium are once again the reason that Karunagappally is part of this list. In Kollam de Kerala, the district where the radioactive zone is located, there is a type of rock that contains monacite and, therefore, thorium. The rocks being part of the terrain make the entire area radioactive.

It is located between Rio de Janeiro and Salvador de Bahia in Brazil. And it has dimensions of about 700 kilometers in length. The beaches found in this area are highly radioactive due to the monacita that houses thorium inside. Thorium is a chemical element, symbol Th and atomic number 90, of the series of actinides.

It is found in the natural state in the minerals monacita, torita and torianita. It is a potential source of nuclear energy and is used in alloys together with magnesium, in electric filaments and electrodes. The level of exposure in the area is about to exceed that allowed in nuclear plant workers.

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