Chernobyl_Disaster2003

8/2/2019 Chernobyl_Disaster2003

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Chernobyl Disaster The worst manmade disaster in human history

Presented By-Princy Philip

Manjula Naicker

Neelam ChhipaSwati KamtheSarfaraz Momin


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Where is Chernobyl?


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Chernobyl Built in

1978-1979 Chernobyl

Chernobyl

Nuclear PowerStation loactednear the city of Prypiat, Ukraine. It was the siteof the Chernobyldisaster in 1986.


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23 May 2007 Czech Technical University inPrague 4

Reactor Plant Scenario1. As the reaction occurs, the uranium fuel

becomes hot

2. The water pumped through the core in

pressure tubes removes the heat from the fuel

3. The water is then boiled into steam

4. The steam turns the turbines

5. The water is then cooled

6. Then the process repeats


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http://www.chernobyl.info/


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What really happened the

meltdown

The smoking reactor

Chernobyl Interinform

The exploded reactor

Igor Kostin (taken 12 hours after the catastrophe)
http://www.chernobyl.info/http://www.chernobyl.info/


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26th of April, 198601:23:00: Start of an experiment in Block IV of the plant 01:23:40: The emergency shutdown fails01:23:48: The reactor explodes, emitting

radioactivity

28th of April, 1986

21:00:00: The Soviet news TASS first reports theaccident

29th of April, 1986:Western news first report of the meltdown

What really happened the

meltdown


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What really happened measures taken

After 36 hours:

Evacuation of 45,000 people from the city of Pripyat

Until May 5th:

Evacuation of 130,000 people from within 30 km of ground

zero

May 1st, 1986:

The state begins the control of water and milk

23. May 1986:

Iodine tablets start to be disseminated


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What really happened Measures Taken

The plants fire brigades try tocontrol the flames

600,000 860,000 young men(so called liquidators) are drafted to cleanup the wreckage

Until May 5th: 4,200 tons of lead and sandare dropped on the nuclear reactor

May 6th: The fire is finally brought under control

Two men clean a vehicle

Source: Chernobyl Interinform


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What really happened

Radioactive Pollution Death Zone:

30-Kilometer-radius around the reactor

Contaminated regions:Belarus: 30 percentUkraine: 7 percentEuropean Russia: 1,6 percent

Total of 162,000 km 2 are contaminated

Nine million people are affected.400,000 loose their houses andproperties


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What really happened Radioactive Pollution

Changing wind patterns spread the radioactive cloud all over Europe Scandinavia, the Baltic States, Poland, Germany, Switzerland, Austria,

Italy and other regions were contaminated as well

April 26th, 00.00

April 27th,12.00

April 27th, 00.00

April 29th, 00.00


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Direct Casualties

5.5 million people still livein contaminated areas

31 people died in 3 monthsof radiation poisoning

134 emergency workerssuffered from acuteradiation sickness

25,000 rescue workers

died since then of diseasescaused by radiation Cancer afflicts many others Increased birth defects,

miscarriages, andstillbirths


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Indirect Casualties

By the year 2000there were 1800 caseof thyroid cancer in

children andadolescent High number of

suicide and violentdeath among Firemen,policemen, and otherrecovery workers


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Environment Impact Areas still

impacted today: Soil Ground Water Air Food

Crops Livestock
http://en.wikipedia.org/wiki/Image:Chernobylreactor.jpg


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Nuclear Accidents inChernobyl

Accidents1982

In 1982, a partial core meltdown occurred in reactor no. 1 at theChernobyl plant. Due to the secret policy of the Soviet Union, theextent of the accident was not made public until years later. Thereactor was repaired and put back into operation within months.

1986 On April 26, 1986, a disaster occurred at reactor no. 4, which has

been widely regarded as the worst accident in the history of nuclearpower. As a result, reactor no. 4 was completely destroyed and has

since been enclosed in a concrete sarcophagus to prevent furtherescape of radiation.1991

In 1991, during a scheduled shutdown, a fire broke out in reactor no.2's turbine, causing severe damage to the reactor building. It wasthen decided that reactor no. 2 would not be returned to operationbecause of the severity of the damage.
http://en.wikipedia.org/wiki/Image:Chernobylreactor.jpg


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Recommendations Have proper Standard Operating

Procedures (SOP) for both normaland emergency situations

Have scheduled trainings andpractices for normal and emergencysituations


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Recommendations (cont.) Always have a reactor expert on site Have operators confirm any cues

from the system before makinghypothesis or taking action

Have a team work kind of environment such that every body isinvolved


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A Short Video

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Chernobyl_Disaster2003

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