Changes in safety requirements after the Fukushima accident

The feedback experience of the Fukushima accident has led to 4 kinds of consequences. First, complementary assessment of safety have been performed in each nuclear facility to evaluate the safety margin for exceptional natural disasters. Secondly, the conformity to safety requirements of nuclear facilities has to be checked continuously because it can be altered by modifications made on the facility or by maintenance activities. Thirdly, the safety standard framework has to be upgraded in order to take into account some accidents in a cumulative way. Fourthly, the social, humane and organizational factors have to be taken into account and issues like sub-contracting, staff training,or the loss of expertise have to be dealt with. (A.C.)