What new measures is EDF planning? The fourth periodic safety review provides the ideal framework for re-assessing the compliance of certain items of equipment or systems, such as electric power sources and safety functions (e.g. containment of radioactive materials). As was the case with the 900 MWe reactors, EDF plans to implement a reactor compliance verification programme to ensure that existing preventive maintenance programmes are being correctly applied. EDF has also supplemented its actions with extensive checks in the field. The scope of these checks takes into account the specific features of the 1,300 MWe reactors. As part of its equipment ageing and obsolescence management approach, EDF has implemented the following measures: • a generic analysis of ageing and the associated consequences; • a local analysis specific to each reactor, carried out during its ten-yearly outage inspection. In particular, EDF has justified the absence of a risk of sudden rupture of the 1,300 MWe reactor vessels during the ten-year period following the fourth ten-yearly outage, subject to the results of inspections to be carried out on each of the vessels. Each reactor will also undergo pressure tests on the primary system and the reactor containment. Lastly, EDF has undertaken to resolve any deviation identified beforehand, particularly those with safety consequences, during the fourth ten-yearly outage in each reactor at the latest. Any deviation detected during the ten-yearly outage itself will be corrected as soon as possible, taking account of their significance. EDF’s programme for managing ageing and verifying the compliance of its reactors, supplemented by compliance with ASNR’s requirements, is satisfactory. It will enable the objectives of the periodic safety review to be achieved. ASNR asks that EDF, in addition to the initially planned measures: • p rovides justification of the behaviour of the seals on the reactor building equipment hatc, • p rovides justification of the containment function provided by the reactor containment with respect to core melt accident situations. These different points are subject to requirements in ASNR’s decision. EDF must pay special attention to the implementation of the programme for verifying reactor compliance. ASNR plans to carry out specific inspections on each reactor with regard to this topic, particularly during the ten-yearly outages. The ASNR’s décision Conditions for the continued operation of 1,300 MWe reactors beyond 40 years • 13
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