Research indicates that the meltdown of reactor number 2 could have been avoided if water was injected to cool the reactor 4 hours earlier.

Boric acid is injected into reactor number 2 after the discovery of xenon in its containment vessel.

An explosion and fire in reactor number four in April 1986 released a huge radioactive cloud across Europe in the world's worst civilian nuclear accident.

At the Chernobyl Nuclear Power Plant in Prypiat, Ukraine a test on reactor number four goes out of control, resulting in a nuclear meltdown.

Some Soviet scientists have recently reported leaks in the vast, allegedly airtight, concrete sarcophagus that encases the smouldering remains of the infamous reactor number four.

In the Engineering level, near reactor number three!

He was immediately dispatched to the scene, where his energy, intelligence and presence of mind made him the chief decision-taker in the first days after the explosion of reactor number four.

On the final evening of the trip, the team gathers at the viewing platform close to reactor number four.

Geordi hopped down from their perch on the catwalk, followed by Dren, who picked up the tool box and led the way to reactor number four.

The zone was evacuated in 1986 after reactor number four exploded.