2. CHERNOBYL NEUCLEAR
DISASTER
Occurred on 26 April 1986 at
Chernobyl Nuclear Power
Plant in Ukraine.
An explosion and fire
released large quantities of
radioactive contamination
into the atmosphere ,which
spread over much of Western
USSR and Europe.
3. Causes
Operator error initially faulted
The operator error was probably due to their lack of knowledge
of nuclear physics and engineering, as well as lack of experience
and training.
Operating instructions and design deficiencies found
There actor had a dangerously large positive void coefficient.
The void coefficient is a measurement of how are actor responds
to in creased steam formation in the water coolant.
A more significant flaw was in the design of the control rods
that are inserted into there actor to slow down there action.
Other deficiencies besides these were not edinreactor design ,
as were its non-compliance with accepted standards and with the
requirements of nuclear reactor safety.
4. Impact on People
Economic impact
Removal of radiation affected agricultural and forest land from
production.
Hugh amount of money in Belarus and Ukraine used for
Chernobyl related benefits.
Agricultural production costs have increased due to the need for
special cultivation techniques , fertilizers and additives.
5. What happened
SATURDAY APRIL
26,1986
Reactor #4 was undergoing a test to test
the backup power supply in case of power
loss
The power fell to low allowing the
concentration of xenon 135 to rise
The workers continued the test and in
order to control the rising levels of xenon
135,the controlled rods were pulled out.
6. The Reactor after the
Explosion
After the explosion , most of
the plant is still standing .
Some might think from this
picture that the disaster
wasn’t all that bad, but what
makes the Chernobyl
disaster the worst in history
is the sheer volume of radio
active materials that where
spewed across the European
continent .
7. Aftermath
Only 30 people died due to the accident at
Chernobyl, with 2 of those 30 dying
because of the foremost explosions.The
accident released tons of toxic into the
environment,which spread all over
EUROPE.The event gained much
negative media attention and was much
dramatized to represent countless
mutations due to the accident,although
this is far from the truth.
