Interview by Kaspar Schuler (Greenpeace) with Dipl.-Ing. Dieter Majer, former director of the department for «Safety of nuclear facilities» of the German federal ministry for the environment and author of the study «Risks linked to outdated Swiss nuclear reactors». The discussion focussed on ageing problems of the Swiss nuclear power plants of Mühleberg und Beznau, the limited effect of retrofitting, the possible consequences of an accident as well as the responsibility of the nuclear power plant operators and of the Swiss Federal Nuclear Safety Inspection (ENSI).