RIA Novosti 
Feb 13, 2013
A partial roof collapse at the Chernobyl nuclear power plant reported late on Tuesday does not pose any health hazard, officials from the power station said on Wednesday.
Wall panels and parts of the roof fell in on Tuesday in the machine-hall at the plant’s Reactor Number Four, site of the world’s worst nuclear disaster in 1986. The damaged area was about 600 square meters (6,456 square feet), the Ukraine-based plant said in a statement.
No-one was hurt in the incident and the radiation level in the so-called exclusion zone around the plant has not changed, the power station’s management said.
“There is no threat to the lives or health of the population,” Russia’s Emergencies Ministry said early on Wednesday, while confirming the report from the plant.