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On the 26th
of April 1986, the most severe nuclear accident so far
occurred at the Chernobyl nuclear power plant in Ukraine.
The
most important reasons:
The direct
reason for the accident was consistent violation of rules
during the scheduled test of the turbo generator.
| A positive feedback loop caused an exponential
increase of reactor power after initial increase of
reactor temperature!
The reactor at the Krško
Nuclear
Power Plant has negative feedback, which makes
it self-controlling: an increase
in temperature causes a decrease
in power. |
The
consequences of the accident:
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About 120,000 people were evacuated from the
30 kilometer distance around the power plant.
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About 600,000 people, called liquidators,
assisted in removing the consequences of the accident.
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The remains of the reactor were covered with a special
structure called a sarcophagus.
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31 people died as a direct consequence of the
accident.
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30 kilometer exclusion zone is still in
place.
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After 15 years the only measurable increase
in the frequency of cancer cases among the population is thyroid
cancer.
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A
view of the destroyed reactor building.

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