Zatlers participated in the cleanup operations after the disaster at the Chernobyl nuclear plant.

The reactors are similar in design to the Chernobyl plant but have undergone a number of modifications since 1986.

However, the trouble at the Chernobyl plant did not end with the disaster in reactor 4.

But the alternative is even more chilling - a repeat of the world's worst-ever nuclear disaster at the Chernobyl plant in 1986.

The republics also have demanded that three nuclear-power generators still operating at the Chernobyl plant be closed by 1995.

A major difference from the Chernobyl plant is that as temperature rises, it tends to choke off the nuclear reaction.

The Chernobyl plant didn't have a containment building, but the core was eventually stopped by the concrete foundation.

It is not easy for Ukraine to decommission the Chernobyl plant.

Germany is also pressing for financial aid to Ukraine to shut the Chernobyl nuclear plant.

A visit in Chernobyl nuclear plant and deserted city of Pripyat.