Safety, Health & Environment Presention (Chernobyl Tragedy)
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SAFETY, HEALTH AND ENVIRONMENT
PRESENTATION
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CHERNOBYL TRAGEDY
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PRESENTATOR
Lim Jin Cheng Luqman Hakeem Bin Fauzi
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WHERE IS CHERNOBYL?
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Here it is!
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REACTOR
Reaktor Bolshoy Moshehnosty Kipyashiy, (RBMK) “Reactor (of) High Power (of the) Channel (type)”.
There were 4 reactors. Capacity of each reactor was 1 GW.
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INCIDENT
o 26 April 1986o Nuclear accident in the Reactor 4o It is considered the worst nuclear power plant
in history at level 7 on the International Nuclear Event Scale. .
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HUMAN ERRORS
Isolation of the emergency core cooling system
Unsafe amount of control rods withdrawn Connection of the four main cooling pumps
to the right and left of the system
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HUMAN ERRORS (CONT)
Mental model The operator did not have a good mental model
of the system itself Overconfidence
By having an electrical engineer on site for an electrical test
No confirmation of cues obtained from the system
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SYSTEM ERRORS
Use of graphite as a moderator Flawed reactor design and corruption Lack of a well-built containment structure Inadequate instrumentation and alarms for
an emergency situation Inadequately trained personnel Lack of proper regard of safety
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SUMMARY OF INCIDENT
April 26, 1986:Chernobyl nuclear power plant
Operator errors cause a reactor explosion Explosion releases 190 tons of radioactive gasses
into the atmosphere Fire starts that lasts 10 days
People: 7 million lived in contaminated areas; 3
million were childrenWind:
Carries radiation far distances
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THE FALLOUT
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EFFECTS ON HUMAN
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CASUALTIES 5.5 million people still live in contaminated
areas 31 people died in 3 months of radiation
poisoning 134 emergency workers suffered from acute
radiation sickness 25,000 rescue workers died since then of
diseases caused by radiation Cancer afflicts many others Increased birth defects, miscarriages, and
stillbirths
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CASUALTIES (INDIRECT)
• By the year 2000 there were 1800 case of thyroid cancer in children and adolescent
• High number of suicide and violent death among Firemen, policemen, and other recovery workers
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ENVIRONMENT IMPACT
Areas still impacted today:SoilGround WaterAirFood
Crops Livestock
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EFFECT ON ECONOMY
Between 300,000 and 60,000 people were brought in to clean up
Over 235 billion dollars has been spent to clean up the disaster
Belarus lost 1/5 of its farming lands (700 million dollars a year loss)
350 industries were lost due to the disaster
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RECOMMENDATIONS
Have proper Standard Operating Procedures (SOP) for both normal and emergency situations
Have scheduled trainings and practices for normal and emergency situations
Always have a reactor expert on site Have operators confirm any cues from the
system before making hypothesis or take action
Have a teamwork kind of environment such that everybody is involved
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LESSONS LEARNTA stepping stone for a new philosophy – new term in nuclear energy “safety culture”
Nuclear power plants (NPPs) as units of national importance
Safety first! Priority given to people’s safety and preservation of the
environment rather than productivity
Overhaul of current and future projects with focus on risk minimization
Emergency preparedness and safety measures
• Understand, respect and minimize risk
• International and national emergency response systems, highly involving the
community
• Adequate radiation measuring technology in place
• NPP community for knowledge exchange (WANO) and international scientific co-
operation
• Constant quality and safety control and measurement
• Continuous improvement of technology and safety measures
• Communication is key!
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END