What exactly is inside the Chernobyl sarcophagus

Scrapped nuclear reactors of nuclear power plants, wrapped up to reduce leakage.

The task was undertaken by Gorgen Karapetyan, chief test pilot of the Miri Design Bureau, and Anatoly Grishchenko, test pilot of the Gromov Flight Research Center. The Chernobyl nuclear sarcophagus is a closed facility made of concrete in the former Soviet Union in order to prevent the Chernobyl nuclear power plant from producing radioactive nuclear contamination.

The project required the installation of two half-arched buildings that could be joined together around the "sarcophagus", and then the two semi-arched structures were merged by a rail sliding over the "sarcophagus" of reactor No. 4. After they were finally assembled in less than 24 hours, the final height of the "ark" was 108 meters, the width was 250 meters, and the length was 150 meters.

To prevent the continuation of the Chernobyl nuclear leak, the world's largest mobile building sarcophagus was built.

Reasons for the rebuilding of the sarcophagus at the Chernobyl nuclear power plant: In 2008, the western façade of the plant began to collapse after years of natural erosion, and the crews had to use brackets to support it. The sarcophagus has only 5 years left in its "lifespan", and the radiation is still leaking to this day, and Ukraine has to raise funds to build a new protective cover.

On April 19, 2011, Ukraine began commemorating the 25th anniversary of the Chernobyl accident. At the upcoming international aid conference in Kyiv to raise funds for Chernobyl, Ukraine** wants to raise 100 million euros to build a new sarcophagus for reactor No. 4, which is planned to last for 100 years.

Two hundred tons of nuclear fuel were sequestered, including 100 kilograms of plutonium, with a half-life of 247,000 years relative to the history of human development.

1. In the Chernobyl accident, the reactor core was blown up, part of it flew into the sky, part of it landed around the reactor, and part of it was still in the original place, the radiation level was very high, and it could not be eliminated, let alone water injection, etc., in order to inhibit further release, inhibit strong radioactivity, and inhibit the remaining fragmentation core from continuing to dissolve, or even return to criticality, a large number of neutron absorbing materials, cooling materials and shielding materials must be used to fully cover the way, so the sarcophagus was built.

2. Why was the sarcophagus rebuilt? Because of the high internal radioactivity, the cement will be embrittlement, and even cracks, and the gas produced by the reaction between high-temperature nuclear fuel and cement will also produce large internal pressure. Therefore, it needs to be renovated.

3. These nuclear fuels cannot be removed, because the sarcophagus itself is a last resort, and if it can be removed, it will never be considered. The main reason is that the amount of high-level radioactive matter is too large, the radiation level is too high, personnel and equipment cannot get close, and it is too difficult to remove, which cannot be achieved under the current level of science and technology.

3. The 200 tons of fuel will not produce the same as the atomic bomb, but will only produce steam, hydrogen and the like, and the consequence will be to blow up the fuel, and the power is just ordinary power, and the impact range is limited to a few kilometers and will not destroy Europe.

4. The so-called impact on Europe refers to the release of a large amount of radioactivity that leads to the nuclear fuel itself. Up to 10 times 18 powers of the Baker's radioactive material, radioactive material is released into the environment, and as the atmosphere moves, part of it is blown over Europe and some of it settles.

5. The impact of these radioactive substances is actually not large, according to the report of the European Organization for Economic Cooperation and Development (OECD) Nuclear Energy Agency, the irradiated dose of the people in European countries is unlikely to exceed one year's natural background radiation dose, that is, in addition to the natural background irradiation, the irradiation dose is unlikely to exceed millisiever, and it is estimated that the collective dose of European countries is multiplied by 10 to the power of 5 people*Siever, and the report concludes that there is no significant change in the potential health effects deduced from the collective dose of the society, and the mortality rate of advanced cancer has only increased.

The sarcophagus of the Chernobyl nuclear power plant cracked in 2000 So it has to be rebuilt, this nuclear power plant is dangerous to the whole of Europe, so Ukraine repairs this sarcophagus is basically at public expense, so why not repair it, When the nuclear fuel was put in, it did not detonate nuclear fusion, and there were strictly designed handles, ** after the inside was very chaotic, I don't know the situation inside, it is not easy to deal with it, the nuclear reaction stops relying on the control rod in the reactor to absorb neutrons to stop the chain reaction to terminate, When you move out, if you come into contact with a neutron, it's terrifying to react.

That's how I understand it.

What else? Fragments of highly radioactive fuel are piled up inside and cannot be removed.

The Chernobyl nuclear sarcophagus is a closed facility built of concrete in the former Soviet Union to prevent radioactive nuclear contamination from the Chernobyl nuclear power plant.

In the months following the Chernobyl nuclear accident, in order to prevent a nuclear accident at Unit 4 of the power plant, a large multi-storey building was built, a complex ventilation system of thick concrete and steel bar, and all the facilities of Unit 4 were buried in it. This building became a "stone house" and was figuratively called a "sarcophagus".

In 2008, after years of natural erosion, the plant's west façade began to collapse, leaving workers with brackets to support it. The sarcophagus has only 5 years to live, and the radiation is still leaking. Ukraine** must raise funds to build a new shield.

On April 19, 2011, Ukraine commemorated the 25th anniversary of the Chernobyl accident. At the upcoming Chernobyl International Aid Conference in Kiev, Ukraine wants to raise 100 million euros to build a new sarcophagus for reactor No. 4, which is planned to last for 100 years.