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Releases from the Fukushima reactors have included dozens of radioactive elements, but with regard to materials released into the ocean, most of the attention has been on three radioactive isotopes released in large amounts: iodine-131, cesium-137, and cesium-134.

Was Fukushima a gamma radiation?

It is a strong gamma-emitter in its decay. Cs-134 is also produced and dispersed, and it has a 2-year half-life. Caesium is soluble and can be taken into the body, but does not concentrate in any particular organs, and has a biological half-life of about 70 days.

Did radiation from Fukushima reach us?

Radiation from Fukushima has reached the United States in three ways. Air currents carried radiation across the Pacific to the United States. Radioactive iodine and cesium were detected in air, rainwater, surface water and some food samples collected in California within a few days of the Fukushima disaster.

What are 5 radioactive isotopes released in the Fukushima incident?

Cesium signals The initial nuclear accident from the Fukushima reactors released several radioactive isotopes, such as iodine-131, cesium-134 and cesium-137. Cesium-137 has a half-life of 30 years and remains in the environment for decades.

Is Fukushima still leaking radiation 2021?

The radiation levels offshore of Fukushima have dropped in the years since, but some of the reactors there are still leaking. And over the last decade, TEPCO has continued to cool the fuel cores with water, which is contaminated by the process.

What type of radiation was released in Chernobyl?

What kind of radiation were people exposed to at Chernobyl? The first responders, including firefighters and nuclear workers who tried to put out the multiple fires and prevent the explosion of other reactors at the nuclear power plant, were exposed to large doses of gamma radiation.

What type of radiation is released from a nuclear power plant?

Radiation particularly associated with nuclear medicine and the use of nuclear energy, along with X-rays, is 'ionizing' radiation, which means that the radiation has sufficient energy to interact with matter, especially the human body, and produce ions, i.e. it can eject an electron from an atom.

What is the radiation level at Fukushima?

The accident was rated level 7 on the International Nuclear and Radiological Event Scale, due to high radioactive releases over days 4 to 6, eventually a total of some 940 PBq (I-131 eq). All four Fukushima Daiichi reactors were written off due to damage in the accident – 2719 MWe net.

How much radiation is coming from Fukushima?

On 24 May 2012, more than a year after the disaster, TEPCO released their estimate of radioactivity releases due to the Fukushima Daiichi Nuclear Disaster. An estimated 538.1 petabecquerels (PBq) of iodine-131, caesium-134 and caesium-137 was released.

Why is Fukushima still radioactive?

When the meltdown was occurring, the wind was blowing toward the northwest , contaminating a valley through the mountainous region. These areas still have relatively high radioactivity. The half-life of radiocesium is about 29 years, meaning the quantity of the radioactive material should drop by half by roughly 2041.