[en] This Power Point document first recalls the sources of exposure to radiations for the French population, the effects of radiation, and some data on the Chernobyl accident. It presents the ASN, its organisation, its means, its missions. It presents the different French nuclear sites, indicates the mean age of nuclear reactors in the World. It describes the licence renewal process, the safety re-examination process. Then, it addresses the Fukushima accident and more particularly the main challenges after the accident: to restore a safe status for the installations, to manage the contamination of the environment. It addresses the consequences for France, i.e mainly safety additional assessment process which has been launched, and the ASN opinion. It indicates the installations located in the Rhone-Alpes region to be assessed in priority, describes the ASN approach for the next months