Chernobyl: what happened 30 years ago?
In the early hours of 26 April 1986, one of four nuclear reactors at the
Chernobyl power station exploded.
Moscow was slow to admit what had happened, even after increased
radiation was detected in other countries.
The lack of information led to exaggerated claims of the number killed
by the blast in the immediate area.
Contamination is still a problem, however, and disputes continue about
how many will eventually die as a result of the world's worst nuclear
accident.
26 April 2016
It has been 31 years since the Chernobyl disaster - the worst nuclear
catastrophe in human history.
Back in 1986, Yuriy Andreyev worked at the Chernobyl nuclear plant and was
one of the engineers who helped contain the fallout of the accident.
In 2012 he gave his account of the events to BBC Ukrainian.
Chernobyl nuclear disaster site given new ‘shield'
18 March 2015
A new shelter is being built to protect the site of the world's worst nuclear
accident, at Chernobyl in Ukraine.
The construction costs over £1 billion ($1.46 billion /1.38 billion euros) and is
intended to stop radioactive material leaking, and to allow the old reactor to
be dismantled safely.
A catastrophic explosion in April 1986 caused 31 deaths, and the radioactive
material released spread across Europe.
The BBC's Science Editor David Shukman went to see the shield being built.
Construction to protect Chernobyl reactor site
7 December 2015
An arch is being constructed to protect the site of the Chernobyl nuclear
power plant, damaged in 1986.
Upon completion in 2017, the arch will be moved into position to shelter
reactor 4 from the elements.