Complementary-safety-assessments-french-nuclear-safety

- 94 - Dampierre CPY VD2 RFS I-2-C The DBE encompasses the earthquake selected by RFS I-2-C. In the preparations for VD3, the DBE was compared with the earthquakes resulting from RFS 2001-01. For the nuclear island, the overshoots above 10 Hz are considered to have no impact. For the site structures, the overshoots above 2 Hz were the subject of verifications. They have no impact on the site buildings and structures. These overshoots are linked to the adoption in the new rule of the minimum fixed earthquake, given the low level of local seismicity. Gravelines CPY VD2 RFS I-2-C The earthquake resulting from RFS I.2.C was justified at the time of VD2. During the preparations for VD3, the earthquake resulting from RFS 2001-01 was verified. The new reference earthquake entailed an overshoot for the nuclear island beyond 5 Hz, considered to have no impact. The implementation of reinforcements and minor changes to the site structures and equipment has been completed at Gravelines 1 and will be carried out during the ten-yearly outages on the other reactors (end of works in 2017). Saint Laurent CPY VD2 RFS I-2-C The nuclear island DBE encompasses the earthquake resulting from RFS I.2.c and 2001-01. The earthquake for the site structures is covered by the earthquake resulting from RFS I-2-c and entails slight overshoots beyond 7 Hz, for the earthquake resulting from RFS 2001-01. The absence of impact on the site structures and equipment was confirmed. Tricastin 1-2 CPY VD3 RFS 2001-01 For the design of Tricastin, two reference earthquakes were used: EDF 0.2 g and DSN 0.3 g, both of which encompass the earthquakes resulting from the application of RFS I-2-C and 2001-01. Tricastin 3-4 CPY VD2 RFS I-2-C For the design of Tricastin, two reference earthquakes were used: an EDF spectrum normalized to 0.2 g and a spectrum with more high frequencies normalized to 0.3 g to take account of the specific characteristics of the site. These earthquakes encompass those resulting from application of RFS I-2-C and 2001-01. Chooz N4 VD1 RFS 2001-01 The earthquake resulting from RFS 2001-01 is covered by the DBE. Flamanville 1-2 P4 VD2 RFS 2001-01 The DBE encompasses the earthquakes resulting from RFS I-2-C and 2001-01. Paluel P4 VD2 RFS 2001-01 The DBE encompasses the earthquake resulting from the application of RFS 2001-01 up to 25 Hz. The slight overshoot above 25 Hz has no impact. Saint Alban P4 VD2 RFS 2001-01 The DBE encompasses the earthquakes resulting from RFS I-2-C and 2001-01.

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