Verification of facilities’ compliance with applicable rules, and maintenance of that compliance over time, are based primarily on the following : • verification of the compliance of equipment and structures and, where applicable, implementation of measures required to restore compliance • management of equipment ageing and obsolescence. Daily actions are carried out to support ageing and compliance management (such as monitoring, maintenance, inspection, treatment of deviations, and replacement of equipment), and to ensure that the facilities comply with all rules governing safe operation. The compliance of reactors is an essential prerequisite for their safety. Therefore, verification of compliance with baseline safety requirements is a key objective of the periodic safety reviews. Certain items of reactor equipment were originally designed for an assumed service life of 40 years. Therefore, continued operation of the reactors beyond this fourth periodic safety review will require the design studies to be updated and items of equipment to be replaced. Special attention must be paid to components that cannot be replaced, such as the reactor pressure vessel (which contains the nuclear fuel) and the reactor containment . ASNR’S DECISION AND REQUIREMENTS Ageing and compliance of facilities How should the facilities be managed? 12 • Les cahiers de l’ASNR • July 2025
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