1. St, Mary’ s Convent Inter College, Manak Nagar, Lucknow, India
Man Made Disasters
Man Made Diasters
A presntation by
7 CVirat Singh Class
St, Mary’ s Convent Inter College, Manak Nagar, Lucknow, India

2. The disaster at Chernobyl The worst manmade disaster in human history
Man Made Disasters
The disaster at Chernobyl The worst manmade disaster in human history
By Virat Singh Class 7 C
St, Mary’ s Convent Inter College, Manak Nagar, Lucknow, India

3. Man Made Disasters
Where is Chernobyl?
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Virat Singh 7 C

4. Chernobyl Built in 1978-1979 Chornobyl Man Made Disasters 6/29/2019
Virat Singh 7 C

5. Man Made Disasters
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Virat Singh 7 C

6. Man Made Disasters
Background
Reaktor Bolshoy Moshehnosty Kipyashiy
RBMK, a Russian acronym translated roughly means “reactor (of) high power (of the) channel (type)”
It was a reactor cooled by water and moderated by graphite
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Virat Singh 7 C

7. Man Made Disasters
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Virat Singh 7 C

8. Man Made Disasters
RBMK Reactor
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Virat Singh 7 C

9. Man Made Disasters
Fuel assemblies
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Virat Singh 7 C

10. Man Made Disasters
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Virat Singh 7 C

11. Reactor Plant Scenario
Man Made Disasters
Reactor Plant Scenario
As the reaction occurs, the uranium fuel becomes hot
The water pumped through the core in pressure tubes removes the heat from the fuel
The water is then boiled into steam
The steam turns the turbines
The water is then cooled
Then the process repeats
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Virat Singh 7 C

12. The day of disaster 25 April 1986 01:00 The preparation for the test
Man Made Disasters
The day of disaster
25 April 1986
01:00 The preparation for the test
13:47 Lowering of the reactor power halted at 1,600 MWt
14:00 The ECCS was isolated
23:10 The power reduction resumed
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Virat Singh 7 C

13. 26 April 1986 24:00 Operation shift change
Man Made Disasters
26 April 1986
24:00 Operation shift change
24:28 Power level is now 500 MWt and kept decreasing to 30 MWt
24:40 The operator withdrew some control rods
01:00 Power had risen to 200 MWt
01:03 Connecting the fourth main cooling pump to the left loop of the system 200 MWt
01:07 Connecting the fourth main cooling pump to the right of the loop system - this was a violation of NOP
Continued to next slide
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Virat Singh 7 C

14. Interesting, right?
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