In application of the rules for declaration of safety, radiation protection and environmental incidents, EDF declared 759 significant incidents rated on the INES scale in 2005, 575 of which concerned safety, 170 of which concerned radiation protection and 14 of which were linked to uncontrolled releases of radioactive products into the environment.

The events declared with respect to environmental protection and which concern neither nuclear safety nor radiation protection, are not rated on the INES scale. 15 such events were declared in 2005.

The number of incidents declared in 2005 was higher than in 2004. This rise chiefly concerns the number of safety events declared and is in particular due to the rise in the number of incidents linked to application of technical operating specifications and quality assurance provisions. The proportion of incidents rated 1 on the INES scale is about 6.5%, or 47 incidents concerning safety, two concerning radiation protection and none concerning the environment. The number of incidents classified 1 is down on 2004.

Furthermore, on 9 December 2005, the ASN rated as level 2 on the INES scale an anomaly concerning the water pumps on the low pressure safety injection system (RIS BP) and the containment spray system (EAS) for the EDF 900 MWe reactors (see point 2.2.1).