Remedial efforts Chernobyl nuclear disaster

Pour "concrete coffin" to prevent the spread of radioactive substances is one of the government measures applied Ukraine nuclear disaster 29 years ago.

Control Room inside the Chernobyl nuclear power plant in the city of Pripyat, Ukraine.Dawn on 04/26/1986, reactor No. 4 of the plant exploded, causing a nuclear disaster worst in human history. Fallout spread to many parts of the western Soviet Union, Eastern and Western Europe, Scandinavia, Great Britain and the eastern United States.Ukraine, Russia and Belarus are places heavily influenced. Disasters caused 31 people were killed instantly and 400,000 people have been evacuated. The amount of radiation from the explosion 400 times larger than the atomic bomb dropped on Hiroshima in Japan during World War II. Photo: RIA Novosti

Photos reactor number 4 after the disaster. Photo: Reuters

The Chernobyl plant's workers check radiation levels in the technical room of reactor number 1 and number 2 on 05/06/1986. Although the reactor No.4 serious damage, the reactor number 1, 2 and 3 restart in April and May 12/1987 10/1986. The plant resumed production Chernobyl nuclear power until closing altogether in January 12/2000. Photo:Reuters

5/1986 early May, though radiation levels are extremely high level of force to solve the consequences of the explosion are still brave to perform the tasks. Do not have the necessary protective equipment and unknown danger level, many volunteers were exposed to radiation. According to a report by the World Health Organization (WHO), the Soviet Union has mobilized more than 6,000 forces to Chernobyl to overcome consequences of the explosion. Photo: Wikipedia

Soviet authorities that helicopters spraying disinfectant down radioactive reactor 4. Many measures to reduce radiation emission - as sand and lead to drop explosion scene - also be deployed immediately after the accident. Photo: RIA Novosti

Volunteers clean up debris at the scene of the explosion. Photo: Wikipedia

Technical staff for reducing radioactive military vehicles operating in Chernobyl area.Photo: RIA Novosti

Staff involved in disaster remedial must wear respirator protection. Photo: RIA Novosti

After the incident, officials have poured a "concrete coffin" around reactor number 4 to prevent 190 tons of radioactive dust spread further into the environment. However, over time and due to the effects of radioactive substances, casings that are degraded.Authorities Ukraine will build new steel casing, domed shape with a height of 105 m, 150 m in length and 260 meters width around reactor number 4. The new envelope will survive about 100 years and the cost of construction built it in about 1.3 billion euros.They call the new guise as the "sarcophagus". Under the plan, the process of building it began in 2010 and will end in 2015. However, projects often delayed due to many reasons. Photo: BBC

Ukrainian officials set "Quarantine" - area with a radius of 30 km from the center of the nuclear reactor 4. It works out, the area took place under the supervision of the security forces. Photo: AFP

The Belarus plant workers on contaminated land in 4/2011. As one of three countries most heavily affected from the disaster, the government of Belarus made ​​the necessary measures to protect ecosystems, including tree planting around the Chernobyl plant to prevent radioactive wind in the neighborhood. Photo: AFP

Workers check radiation levels before leaving the workplace (2014). Nearly 30 years after the nuclear disaster in wretched, approximately 7,000 workers are still working in the Chernobyl plant. Their mission is to overcome the consequences of the explosion and taken to the state plant decommissioning safely. Photo:  Exclusivepix Media

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Firefighters join object remedial Chernobyl disaster in 1986. They died from radiation exposure within weeks or months after the incident. With the efforts of local governments and the international community, the current radiation levels in the area around reactor number 4 is no longer as high as before. Photo: AFP