(GRS-IRSN 3) Safety State of the Sarcophagus

In the night of 26 April 1986, the most severe accident worldwide that ever hit civil nuclear power generation occurred at the Chernobyl nuclear power plant. The explosion in the RBMK-type reactor no. 4 and the subsequent fire in the reactor core lead to a considerable release of radioactive materials into the environment and to fuel debris of the reactor core being thrown out into the area surrounding the power plant.