As of the date of final shutdown, the licensee is no longer authorised to operate its installation. It begins to prepare for its decommissioning. The operations in preparation for decommissioning often consist in removing the radioactive and chemical substances present in the installation (spent fuel), in preparing the premises (organisation of storage areas), or adapting the utility networks (ventilation, electricity distribution). At least 2 years before the date envisaged for final shutdown, the licensee informs the Minister responsible for nuclear safety, and ASN, of its intention to definitively shut down its installation. This declaration is made known to the public. No later than 2 years after the shutdown declaration, the licensee must send the Minister its decommissioning file. This file presents the decommissioning operations proposed by the licensee, as well as the steps it takes to mitigate the impacts on persons and the environment. Once a BNI* has been definitively shut down, it must be decommissioned. France has opted for “immediate” dismantling. A regulatory procedure is implemented to oversee decommissioning of the installation up to its delicensing*. What happens after final shutdown? Preparation for decommissioning End of operation Transmission of decommissioning file 2 years maximum Final shutdown Shutdown declaration * Voir glossaire page 30 NPP SHUT DOWN See glos ary page 30 6 • Les cahiers de l’ASN • June 2022 THE DECOMMISSIONING FRAMEWORK
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