Chernobyl Disaster

  

Chernobyl Nuclear Accident, in history chernobyl nuclear accident near the city of Pripyat in Soviet Russia on 26th April 1986 in the No.4 light water graphite moderated reactor at the Chernobyl Nuclear Power Plant is one of the worst nuclear disasters ever happened on planet earth. 

The test to be conducted on that day was to be conducted before the start of the reactor but due to builders interest in getting a bonus instead of safety the reactor was opened many defects.During the system power-failure stress test in which the security systems were turned off knowingly , a combination of both the design faults and operator’s wrong decision of running the test even if the reactor is not in the specified checklist conditions has lead to this gnarly disaster. The head of the department is Dyatlov who has already worked in nuclear field while installing reactors in submarines and was exposed to radiation of 3 life times(200 Rems). The operators in the room on the day were inexperienced with this type of rectors. When the reactor was jumping down on power and finally stalled due to Dyatlov (the chief engineer) orders the operators have raised the Boron control rods out of the reactor this lead to loss of control over the reactor. The rapid increase in the nuclear reactors productivity was observed by nuclear reactor operator who has deployed the Boron control rods tipped with Graphite as a safety procedure but what was not known at that time was that it would increase the reactivity. At exactly 1:26:00Am early morning on 26th April 1986 the 15 rods in the reactor have split themselves with a surge in power at the bottom of the reactor . A few minutes later the rising steam pressures have blew the 500 tone upper cap of the reactor 4. The engineers in the room are far enough to survive the blast but not fat enough to survive the radiation. The explosion has left 2 workers dead immediately and 28 members by the next week due to acute radiation poisoning.

When the explosion happened a huge amounts of radioactive fuel entered the air, which was almost 20 times Hiroshima-Nagasaki bombs. This radioactive has spread all over ukraine and into the heart of Europe. People working at other reactors in other parts of the continent were noticing a spike in radiation with an unknown source. Later when the fire at reactor came under control it was released officially to public. Many firefighters and other near by  were affected by the radiation at the time of dousing the fire. The people living in pripyat were evacuated from the city on that day noon as a temporary evacuation but they never returned back. A 30Km exclusion zone was declared , until now and upto to many coming years in the future no one is allowed to enter the zone without prior permissions and safety. Even though such an disaster has took place the government has decide to run the other reactors without any changes. Now on this day few of them are decommissioned and new ones are built but the reactor 4 is left alone with a sarcophagus (containment facility) blocking the radiation.

Fun Fact:

Smokers receive the highest radiation than any other person on Earth.