Supervision of the EPR reactor

The EPR reactor is a pressurised water reactor (PWR) whose design, which has evolved with respect to that of the PWRs currently in operation in France, is intended to meet more stringent safety objectives.

ASN’s supervision of the Flamanville-3 reactor construction (EPR) : News

Read the newsletters about the supervision of the Flamanville-3 reactor construction (EPR) ...

Published on 12/09/2011 • 05:21 pm

Information notice

Information Letter No.11

Since 2008, several inspections by ASN have examined the prestressing system[1] of the Reactor Building containment. During construction of the first concreting lifts of the inner containment wall, EDF notified ASN of noncompliance issues relating to the prestressing system (see Information Notice No. 8). In May 2011, new noncompliance issues regarding positioning of portions of the prestressing sheaths were identified. In addition to occasional deviations, ASN found that recurring anomalies in the system indicated a lack of preparation, skills and training in safety culture on the part of workers and shortcomings in EDF’s monitoring of its subcontractors. As a result, ASN requested EDF to suspend concreting of the inner containment wall on 23 June 2011 and to present an action plan to avoid any further deviations in constructing the prestressing sheaths.

Published on 26/04/2011 • 10:49 am

Information notice

Reactor vessel head for the Flamanville EPR

In November 2010, AREVA NP detected defects in several nozzle penetration* welds during its regulatory manufacturing inspections of the Flamanville 3 EPR reactor vessel head.

Published on 19/04/2011 • 10:41 am

Information notice

Health and safety inspection at EPR reactor

ASN oversees occupational health and safety inspection at French nuclear power plants [1]. It provides coordinated oversight of the health, safety, working conditions and quality of employment of EDF employees, as well as those of EDF service providers and subcontractors, just as it does for nuclear safety at facilities. This activity covers the construction, operation and decommissioning of nuclear power plants [2].

Published on 10/02/2011 • 05:21 pm

Information notice

Information Letter No.10

During the second half of 2010, ASN continued its inspection activities at the Flamanville 3 EPR construction site.