During over 14,700 cumulative reactor years of commercial operation in 32 countries, there have been three major accidents at nuclear power plants. These accidents aroused extensive concerns and resulted in a call for concerted global efforts to further enhance nuclear safety. In an effort to continually improve safety at nuclear power plants, the international nuclear community has incorporated lessons learned from these accidents into safety improvement programmes. The Fukushima Daiichi accident highlighted once more the need to access knowledge and experience from previous accidents, and making best use of that knowledge has risen high on the agenda of Member States. Preserving the knowledge of nuclear accidents, and organizing it into a usable and easily accessible form is a high priority for national authorities — not only in the countries where accidents have happened but in all Member States with active nuclear power programmes.

Lessons by the Three Mile Island accident, the Chernobyl accident and the Fukushima Daiichi accident are to be incorporated to reach the final goal.  

"Standards of safety for protection of health and minimization of danger to life and property"-how can we step forward?