Disaster at the Chernobyl nuclear power plant radiation accidents. A deadly experiment. Chronology of the disaster at the Chernobyl nuclear power plant. When and what time the accident happened at the chaes
Chernobyl dispatchers at work
April 25, 1986 was an ordinary day that did not bode well for anything new in the work of the Chernobyl nuclear power plant. Is that an experiment was planned to test the run-out of the turbine generator of the fourth power unit ...
As usual, the Chernobyl NPP met a new shift. The explosion at the Chernobyl nuclear power plant is something that no one from that fateful shift thought about. However, before the experiment began, an alarming moment appeared that should have attracted attention. But he didn’t.
Control room of the Chernobyl nuclear power plant, today
The explosion at the Chernobyl nuclear power plant was inevitable
On the night of April 25-26, the fourth power unit was being prepared for preventive maintenance and an experiment. For this, it was required to reduce the reactor power in advance. And the capacity was reduced - to fifty percent. However, after a decrease in power, the reactor was poisoned with xenon, which was a product of fuel fission. Nobody even paid attention to this fact.
The staff were so confident in the RBMK-1000 that they sometimes treated it too lightly. The explosion of the Chernobyl nuclear power plant was out of the question: it was believed that it was simply impossible. However, a reactor of this type was a rather complex installation. The peculiarities of managing his work required increased care and responsibility.
4 power unit after the explosion
Staff actions
To track the moment when the explosion occurred at the Chernobyl nuclear power plant, it is necessary to delve into the sequence of personnel actions that night.
By almost midnight, the dispatchers gave their permission to further reduce the reactor power.
Even at the beginning of the first hour of the night, all the parameters of the state of the reactor corresponded to the declared regulations. However, after a few minutes, the reactor's power dropped sharply from 750 mW to 30 mW. In a matter of seconds, it was increased to 200 mW.
View of the exploded power unit from a helicopter
It is worth noting that the experiment had to be carried out at a power of 700 mW. However, one way or another, it was decided to continue the test at the existing capacity. The experiment was to be completed by pressing the A3 button, which is the emergency protection button and which muffles the reactor.
Chernobyl disaster. The accident at the Chernobyl nuclear power plant shocked the whole world, including its consequences.
If many people think that the Chernobyl accident immediately claimed many lives, then this is not so. During the explosion itself, one operator died, whose remains are still buried under the rubble, and the second died from injuries and burns already in the hospital.
When Chernobyl exploded, there were several blows (most eyewitnesses claim that there were two explosions), the exact time is 04/26/1986 at 01:23:47 (Saturday).
The reactor was destroyed in just three minutes.
Already after the explosion of the Chernobyl nuclear power plant and after the liquidation works, 31 people died within 3 months (due to radiation), employed in the first hours of eliminating the fire.
As a result, more than half a million people were attracted for the liquidation work. The Chernobyl accident claimed the lives of up to 80,000 people due to distant radiation exposure.
134 of them had an acute stage of radiation sickness (these are the first people to come to the call).
What is Chernobyl
The city got its name thanks to the wormwood, in ancient times it was called the Chernobyl disaster.
Now, due to environmental conditions (rain, wind, etc.), as well as as a result of the activities of people on the ground, it has significantly decreased.
After the lapse of time, radioactive substances have already entered the ground and enter agricultural products through the root system.
The danger is posed by berries, mushrooms and in forests, because cesium is recycled there and, as a result, it is not excreted. However, the fish is not dangerous.
Many are interested in the mutation after the explosion of the Chernobyl nuclear power plant. Research has shown that it continues, but not to a significant extent.
The absence of man and his influence on nature had a beneficial effect on the ecosystem. Now the flora and fauna there are fragrant, the populations of animals and plants have increased.
31 years after the incident, people are still wondering what happened in Chernobyl. After all, this accident has surpassed and.
Although it is worth noting that these are still different accidents and incidents.
For some, Chernobyl is a lost homeland. For some, it was a war zone, where, in order to survive, it was necessary to precisely control the time, and for work, to forget about the fear of death. For some, it's a dystopia
"We were awakened by the sound of a fire siren."
Pripyat city, 1978.
“Spring in 1986 was very warm. Orchards bloomed, fields were plowed and sown. On Friday, April 25, we fell asleep peacefully, and at night we were awakened by the sound of a siren. A column of fire trucks was walking along the highway towards Pripyat. We realized that something terrible had happened. Nevertheless, in the morning people went to the fields, some even went to work in Pripyat, because there were no official messages, - recalls Tatiana Rudnik... - Then government cars began to arrive in the city of Chernobyl: "ZILs", "Chaika", "Volga" ".
“We have patronage, we visit sick and lonely people: wash, cut, buy food. A monument to the heroes of Chernobyl was erected, a museum was opened. Now we are trying to reconstruct the Park in memory of the heroes of Chernobyl. We arrange memorial services, ”said Tatiana Rudnik.
There are cities where "Chernobyl victims" complain about the lack of attention of the authorities. “Of course, they do give us help, but not much,” says, in particular, Alexander Gadush from Volgograd.
Almost 25 years have passed since the terrible event that shocked the whole world. The echoes of this catastrophe of the century will agitate the souls of people for a long time, and its consequences will touch a person more than once. The disaster at the Chernobyl nuclear power plant - why did it happen and what are its consequences for us?
Why did the Chernobyl disaster happen?
There is still no unequivocal opinion about what caused the disaster at the Chernobyl nuclear power plant. Some argue that the reason is defective equipment and gross mistakes during the construction of a nuclear power plant. Others see the cause of the explosion in the failure of the circulating water supply system, which provided cooling of the reactor. Still others are convinced that it was all the fault of the experiments conducted at the station on that ominous night on the permissible load, during which there was a gross violation of the operating rules. Still others are sure that if there was a protective concrete dome over the reactor, the construction of which was neglected, there would not be such a spread of radiation that happened as a result of the explosion.
Most likely, this terrible event happened due to a combination of the listed factors - after all, each of them had a place to be. Human irresponsibility, acting "at random" in matters relating to life and death, and deliberate concealment of information about what happened on the part of the Soviet authorities led to consequences, the results of which will echo through more than one generation of people all over the world.
Chernobyl disaster. Chronicle of events
The explosion at the Chernobyl nuclear power plant happened late at night on April 26, 1986. A fire brigade was called to the scene. Brave and courageous people, they were shocked by what they saw and, from the off-scale radiation counters, they immediately guessed what had happened. However, there was no time to think - and a team of 30 people rushed to fight the disaster. From protective clothing, they wore ordinary helmets and boots - of course, they could in no way protect the firefighters from huge doses of radiation. These people have been dead for a long time, all of them at different times died a painful death from the cancer that struck them.
By morning the flame was extinguished. However, lumps of uranium and graphite emitting radiation were scattered throughout the nuclear power plant. The worst thing is that the Soviet people did not immediately learn about the disaster that occurred at the Chernobyl nuclear power plant. This made it possible to remain calm and prevent panic - this is exactly what the authorities sought, closing their eyes to the cost of their ignorance for people. The ignorant population for two whole days after the explosion calmly rested in the territory that had become mortally dangerous, went out into the nature, to the river, on a warm spring day, children were on the street for a long time. And everyone absorbed huge doses of radiation.
And on April 28, a complete evacuation was announced. 1100 buses in a column took out the population of Chernobyl, Pripyat and other nearby settlements. People abandoned their homes and everything that was in them - they were allowed to take with them only identity cards and food for a couple of days.
An area with a radius of 30 km was recognized as an exclusion zone not suitable for human life. Water, livestock and vegetation in this area were found to be unfit for consumption and pose a health hazard.
The temperature in the reactor in the first days reached 5000 degrees - it was impossible to approach it. A radioactive cloud hung over the nuclear power plant, which circled the Earth three times. To nail it to the ground, the reactor was bombed from helicopters with sand and poured with water, but the effect of these actions was scanty. There was 77 kg of radiation in the air - as if one hundred atomic bombs were simultaneously dropped on Chernobyl.
A huge ditch was dug near the Chernobyl nuclear power plant. It was filled with the remains of the reactor, pieces of concrete walls, and the clothes of the disaster relief workers. Within a month and a half, the reactor was completely sealed with concrete (the so-called sarcophagus) to prevent radiation leakage.
In 2000, the Chernobyl nuclear power plant was closed. Until now, work is underway on the Shelter project. However, Ukraine, for which Chernobyl became a sad "inheritance" from the USSR, does not have the required money for it.
The tragedy of the century, which they wanted to hide
Who knows how long the Soviet government would have hidden the "incident" if it had not been for the weather. Strong winds and rains, so inopportunely passed through Europe, carried radiation around the world. Most of all "got" to Ukraine, Belarus and the south-western regions of Russia, as well as Finland, Sweden, Germany, Great Britain.
For the first time, unprecedented figures on the radiation level meters were seen by employees of the nuclear power plant in Forsmark (Sweden). Unlike the Soviet government, they rushed to immediately evacuate all people living in the surrounding area, before they established that the problem was not in their reactor, but the alleged source of the outgoing threat was the USSR.
And exactly two days after the Forsmark scientists declared a radioactive alarm, US President Ronald Reagan was holding pictures of the Chernobyl disaster site, taken by an artificial CIA satellite. What was depicted on them would make even a person with a very stable psyche horrified.
While periodicals around the world trumpeted about the danger posed by the Chernobyl disaster, the Soviet press got off with a modest statement that there was an "accident" at the Chernobyl nuclear power plant.
Chernobyl disaster and its consequences
The consequences of the Chernobyl disaster made themselves felt in the very first months after the explosion. People living in the territories adjacent to the site of the tragedy died from hemorrhages and apoplectic strokes.
The liquidators of the consequences of the accident suffered: out of the total number of liquidators of 600,000, about 100,000 people are no longer alive - they died from malignant tumors and destruction of the hematopoietic system. The existence of other liquidators cannot be called cloudless - they suffer from numerous diseases, including cancer, disorders of the nervous and endocrine systems. The same health problems have many evacuees, the affected population of the adjacent territories.
The consequences of the Chernobyl disaster for children are terrible. Developmental delays, thyroid cancer, mental disorders and a decrease in the body's resistance to all types of diseases - this is what awaited children exposed to radiation.
However, the worst thing is that the consequences of the Chernobyl disaster affected not only people living at that time. Problems with carrying pregnancy, frequent miscarriages, stillborn children, frequent birth of children with genetic abnormalities (Down's syndrome, etc.), weakened immunity, affecting the number of children with leukemia, an increase in the number of cancer patients - all these are echoes of the disaster at the Chernobyl nuclear power plant, which will come to an end. not soon. If it comes ...
Not only people suffered from the Chernobyl disaster - all life on Earth felt the lethal force of radiation on itself. As a result of the Chernobyl disaster, mutants appeared - descendants of people and animals born with various deformations. A foal with five legs, a calf with two heads, fish and birds of unnaturally huge sizes, giant mushrooms, newborns with deformities of the head and limbs - photos of the consequences of the Chernobyl disaster are horrific evidence of human negligence.
The lesson taught to mankind by the Chernobyl disaster was not appreciated by people. We are still careless about our own life, we are still striving to squeeze out of the riches given to us by nature to the maximum, everything we need "here and now." Who knows, maybe the disaster at the Chernobyl nuclear power plant was the beginning to which humanity is moving on a slow, but sure path ...
Film about the Chernobyl disaster
We advise everyone who is interested to watch the full-length documentary "Battle for Chernobyl". This video can be watched right here online and for free. Happy viewing!
Look for another video on youtube.com
Chernobyl
The Chernobyl accident. Chronology of events. April 26, which divides the history of Ukraine into two periods - before and after the crash.
Here is a brief chronology of the most important dates associated with the Vladimir Ilyich Lenin Nuclear Power Plant in Chernobyl.
The Chernobyl accident per minute, the years of events from 1970 to 2016 are also included.
1966
The Council of Ministers of the USSR issues a resolution of June 29, 1966, which approves the plan for the commissioning of nuclear power plants throughout the USSR.
According to preliminary calculations, the commissioned nuclear power plants were supposed to generate 8000 MW, which would compensate for the shortage of electricity in the central region of the southern part.
1967
From 1966 to 1967, work was carried out to find suitable territories. The work was carried out by the Kiev branch of the Teploelektroproekt design institute. As part of the research, sixteen territories were studied, mainly in the Kiev, Vinnitsa and Zhytomyr regions.
Territory exploration continued until January 1967. As a result, it was decided to stay on the territory in the Chernobyl region, on January 18, 1967, the territory was officially approved by the Board of the State Planning Committee of the Ukrainian SSR.
On February 2, 1967, the Board of the State Planning Committee of the Ukrainian SSR approved the project for the construction of the Chernobyl Nuclear Power Plant.
On September 29, 1967, the reactors were approved to be installed at the Chernobyl Nuclear Power Plant.
In total, there are three approved:
- graphite-water reactor RBMK-1000;
- graphite-gas reactor RK-1000;
- pressurized water reactor VVER.
- Based on the results of the options considered, a decision was made to select the RBMK-1000 graphite-water reactor.
1970
The ChNPP Directorate was formed. Projects and urban planning plans for the city of Pripyat have been approved, and its construction has begun.
May 1970 marked the first pit for the first power unit of the Chernobyl NPP.
1972
The formation of a special water tank begins to cool the reactors. The reservoir was formed by changing the river channel and building a dam in this channel, as a result, in addition to the dam, the Pripyat River acquired a wide navigable canal.
1976
October 1976 the tank filling procedure began.
1977
May 1977 start-up and commissioning work began at the first power unit.
1978
1979
Pripyat receives the rights of the city.
The Chernobyl nuclear power plant produced 10 billion kilowatt-hours of electricity.
1981
1982
On September 1, a malfunction of the reactor No. 1 was recorded. Slight contamination of some of the damaged fuel evaporation units.
On September 9, the destruction of the fuel assembly and an emergency rupture of the technological channel No. 62-44 occurred.
Due to the rupture, the graphite stack of the core was deformed, and a significant amount of radioactive substances was thrown into the reactor space from the destroyed fuel assembly.
The reactor was repaired and restarted. Information about the accident was published only in 1985.
1983
The construction of reactor No. 4 has been completed.
1984
On August 21, the Chernobyl nuclear power plant produced 100 billion kilowatt-hours of electricity.
1986
“The probability of the destruction of the core occurs once every 10,000 years. The power plants are safe and reliable. They are protected from destruction by three security systems, ”said Vitaliy Sklyarov, Minister of Energy and Electrification of Ukraine.
Beginning of preparation for the test of the turbocharger of the reactor 4. The power of the reactor was reduced.
The reactor power was reduced to 1600 MW, which is half the nominal value.
Reduction of the power intended for the own needs of the reactor. Generator shutdown 2.
At this hour, it is expected that the power of the reactor will reach only 30 percent. The capacity, at the request of the dispatcher of the Kiev Energy District, was reduced for several hours. 23:00 the reactor was working at 50 percent. Rated power.
The reactor power was reduced to 1600 MW, at which the experiment was carried out. The operator Kyivenergo banned further power cuts.
The ban on power reduction has been lifted and a new stage of power reduction has begun.
26 April
The night shift took over the reactor.
The reactor power dropped to the planned 700 MW.
The reactor power dropped to 500 MW. Due to the complexity of the steering, the xenon core was "poisoned", as a result of which the thermal power of the reactor decreased to 30 MW. To increase the power of the reactor, the crew removed the control rods. There were only 18 rem in the core, but at least 30 rem is needed.
The reactor power was increased to 200 MW. To prevent the automatic shutdown of the reactor, the personnel blocked the safety system.
A sharp decrease in the reactivity of the reactor.
Start of testing the turbine generator. The turbine valves were cut. The power of the reactor began to grow uncontrollably.
The emergency braking of the control rods did not work because they jammed the channels (and reached a depth of 2-2.5 m instead of a full thrust of 7 m).
Rapid increase in steam power and reactor power (within a few seconds the power was about 100 times higher than the required value).
The fuel overheated, the surrounding zirconium dioxide burst and the molten fuel escaped, and then the pressure channels burst. This started to lead to an exothermic reaction.
Emergency signal given
The first explosion occurred
There was a second explosion - the first was water vapor, then hydrogen was released. The reactor and parts of the structure were destroyed.
As a result of the explosion, the 2000-ton plate was thrown back onto the reactor vessel. Waste graphite core and molten fuel are discarded.
The reactor is estimated to have leaked about 8 out of 140 tons of fuel.
The fire brigade accepted the call from the Chernobyl nuclear power plant and moved forward to extinguish the fire.
An additional fire brigade left the city of Pripyat.
A fire alarm was announced. The staff tried to start the reactor's cooling systems, hoping they were not damaged in the explosion.
Arriving firefighters of the first crew begin to extinguish the fire on the roof of the turbine hall.
The absence of a measuring device was established, the first device was damaged by an explosion. The second is in the area cut off by rubble. The second fire brigade arrived, some of the firemen are engaged in extinguishing the fire, the other part of the calculation is taking apart the rubble to access the measuring equipment.
Firefighters begin to vomit, the skin begins to burn under the clothes.
The Department of the Ministry of the Interior is in charge of the crisis personnel meeting.
It was decided to put blocks on the road. Firefighters and police brigades are called.
The officers are not sufficiently trained - they do not have dosimeters and protective clothing.
Viktor Bryukhanov, director of the plant, arrives at the crisis management center, located in a bunker under the administrative building of the gym.
The authorities notified the central authorities of the incident in Moscow.
The fire is blocked, the possibility of fire transfer to other rooms is excluded.
Other firefighters arrived from Polesie and Kiev.
The fire is completely extinguished.
188 firefighters were called to the scene of the accident.
The irradiated firefighters were evacuated to the 6th radiological hospital in Moscow. Air ambulance was used for evacuation.
The morning shift came to the power plant. Construction work began on the construction site of reactors 5 and 6. 286 people worked there.
A decision was made to supply water to the damaged reactor zone.
A status report was sent to the Chernobyl NPP
The government commission was headed by Valery Legasov. The specialists who arrived at the scene did not expect to see parts of the graphite fuel channels.
The data from the measuring devices were obtained, the level of pollution was established, and a decision was made to evacuate the population.
Requests were sent to neighboring districts and the city of Kiev for the allocation of transport for the evacuation of the population.
The transport department of the city of Kiev gives an order to remove from the routes of all buses of suburban communication and the direction of transport to the city of Chernobyl.
Checkpoints have been set up on roads within a radius of 30 kilometers to prevent the movement of civilians across the contaminated territory.
Reactors 1 and 2 are off.
The administration of the city of Pripyat collects all administrative personnel.
Instructing the administrative staff of hospitals, schools, kindergartens.
Processing of the city begins. Laundry soap and additional water tanks were placed in all toilets in the city. The processing of the premises had to be repeated every hour.
All schools started working, without fail all children were measured with a radiation device, medical personnel issued pills containing iodine.
The processing of the forest around the Chernobyl NPP has begun.
Militia officers were instructed. The precinct officers made a detour and count of residential buildings, taking into account the number of people living in them.
The first emissions of sand, boron and lead over the destroyed reactor No. 4 began.
Two thousand buses and more than one hundred units of military equipment have been assembled on the border of the city of Chernobyl.
The students were sent home with instructions to stay in their apartments. General briefing has begun in the city.
An instant drop in radioactivity around the power plant.
Instructions are conducted at the city police department. The city is divided into six sectors. A responsible person was assigned to each, two police officers were assigned to each entrance of a residential building.
The police officers arrived at their places and began instructing and gathering the residents.
An official announcement of the accident and the planned evacuation of the population was broadcast on the radio.
The evacuation of people from Pripyat began. Almost 50 thousand. People left their homes within 3.5 hours. 1,200 buses were used for this purpose.
Police officers examined the city of Pripyat, recorded the absence of the civilian population.
Increased radioactivity in the air around the Swedish nuclear power plant in Forsmark.
Moscow television reported on the "incident" at the Chernobyl nuclear power plant.
The Danish Institute of Nuclear Physics reported that, most likely, the accident at the Chernobyl nuclear power plant completely melted the reactor.
The Soviet media reported the death of two people as a result of the accident, the destruction of the reactor block and the evacuation of the population.
At that time, American spy satellites took the first photographs of the destroyed reactor.
Analysts were shocked by what they saw - the damaged roof of the reactor and the glowing mass of the molten core of the reactor.
By that day, over 1,000 tons of material had been dropped from helicopters into the destroyed reactor block.
The wind changed direction, and the radioactive cloud began to move towards Kiev. Ceremonial processes took place on the occasion of the May 1 holiday.
May 2
The staff of the liquidation commission found that the core of the exploded reactor was still melting. At that time, the core contained 185 tons of nuclear fuel, and the nuclear reaction continued at an alarming rate.
Beneath 185 tons of molten nuclear material was a reservoir with five million gallons of water. This water was needed as a coolant, and a thick concrete slab separated the nuclear fuel and the water reservoir.
For molten nuclear fuel, a thick concrete slab was not a sufficient obstacle, the melting core burned through this slab, going down to the water.
In the event of contact of the incandescent core of the reactor with water, a massive, radiation-contaminated steam explosion will occur. The result could be radioactive contamination of much of Europe. In terms of the death toll, the first Chernobyl explosion would have looked like an insignificant incident.
The engineers have developed a plan according to which it is possible to avoid a steam explosion. To do this, you need to drain the water in the tank. To drain the water, it is necessary to open the valves located in the flooded radioactive zone.
Three people volunteered for the task:
- Alexey Ananenko senior engineer
- Valery Baspalov mid-level engineer
- Boris Baranov shift supervisor
They all understood that the dose of radiation substances that they would receive during a dive would be fatal for them.
It was about opening valves in a water tank, which was under the damaged reactor, to prevent another explosion - a mixture of graphite and other materials with a temperature of over 1200 degrees Celsius with water.
The scuba divers plunged into a dark reservoir and with difficulty found the necessary valves, manually opened them, after which the water was released. After their return, they were taken to the hospital, by the time of hospitalization they had an acute stage of radiation sickness, they could not be saved.
Work has begun on the construction of a tunnel under reactor No. 4 in order to install a special cooling system there.
A 30-kilometer zone was created around the reactor, from which 90,000 people were evacuated.
A special embankment was built to protect it from pollution.
Reducing radioisotope emissions.
Firefighters pump water from the basement under the reactor core.
From radiation in Chernobyl, they began to give out Lugol's drug.
It was decided to start building a sarcophagus over the destroyed reactor block No. 4.
The Chernobyl Atomic Energy Council was fired, accusing it of "lack of responsibility and because of gaps in the supervision of the reactor."
Russia sent its first report after to the International Atomic Energy Agency.
There it was discovered that an extraordinary sequence of events, negligence, mismanagement and security breaches led to the disaster.
Reactor No. 1 was turned on again.
Work continued on the construction of reactors 5 and 6.
Reactor # 2 was switched on. Hans Blixa, Director of the International Atomic Energy Agency, visited Chernobyl.
The work on assembling the sarcophagi for reactor block 4 has been completed; they are designed for 30 years of radiation protection.
Used 400 thousand tons of concrete and more than 7 thousand tons of metal.
1987
Reactor # 3 started producing electricity again.
Work on the construction of reactors 5 and 6 was stopped.
1989
Closure of reactor No. 2 after a turbine fire. It is important to note that there was no risk of infection.
The final decision was made to stop the construction of reactors 5 and 6.
1991
Fire in the turbine hall of Reactor No. 2.
Power unit No. 2 was put into operation after a major overhaul. While reaching the set power level, one of the turbine generators of the power unit spontaneously turned on.
The reactor power was 50% of the thermal power - at that time, one turbine generator of the unit was operating (at 425 MW).
The spontaneously switched on second turbine generator worked in "propulsion" mode for only 30 seconds.
As a result of the work in the turbine generator, large axle loads arose, which led to the complete destruction of the bearings of the turbine generator shaft.
The failure of the bearings led to the depressurization (desealing) of the generator, which led to the release of large amounts of oil and hydrogen. As a result, there was a big fire.
During the subsequent investigation of the causes of the accident, it was found that the turning on of the turbo generator was caused by the fact that the turbo generator was not protected from the mode of connection to the network on the freewheel of the rotor.
Spontaneous switching on occurred as a result of loss of insulation between the cable controlling the closing of the switch and the cable through which the signal about the disconnected state of the switch is transmitted.
There was a defect in the installation of cables - signal and control cables were placed in one tray.
This accident at the Chernobyl nuclear power plant did not lead to significant pollution of the territory of the exclusion zone. The specific activity of the emission is estimated at 3.6 * 10 -5 Ci.
1992
The Ukrainian authorities are announcing a competition for new construction, which will cover the hastily constructed sarcophagus on reactor building 4.
There were 394 proposals, but only one was considered worthwhile - the construction of a sliding installation.
Assembly tests of structures in Italy. Delivery of the first components for the construction of the sarcophagus.
The first eastern fragment of the dome was raised (5,300 tons, 53 m)
2013
A fragment of the roof over reactor block 4 was destroyed under the pressure of snow. Fortunately, the construction was not compromised.
The second operation to raise the first eastern fragment (9,100 tons, 85.5 m)
The third operation to raise the first eastern fragment (11 516 t, 109 m)
October November
Construction of a new and dismantling of the old chimney for power unit No. 3.
2014
The first part of the construction was completed and moved to the parking lot (12,500 t, 112 m)
The first operation to raise the second western fragment of the sarcophagus (4,579 t, 23 m)
The second operation to raise the second western fragment (8 352 t, 85 m).
The third operation to raise the second western fragment of the dome (12,500 t, 112 m)
2015
The beginning of raising the inclined side walls of the sarcophagus.
Work began on the electrical and ventilation systems inside the dome.
Docking of the two parts of the new sarcophagus.
Commissioning of new equipment for the dome.
2016
Beginning of the ladle shift operation over Reactor Unit 4 and the old sarcophagus.
Ceremonial completion of work on the construction of a new dome over reactor block 4.
