[Machine Translation] Nuclear: new problem for the Flamanville EPR. EDF announced Tuesday it has detected “quality differences” on welds. It does not exclude an impact on the schedule and the cost of the project. Another blow for the EPR under construction in Flamanville. On Tuesday, EDF announced that it had detected, three weeks ago, “quality discrepancies in the production of welds on the pipes of the main secondary circuit of the Flamanville EPR”. While 4,500 employees of EDF and its contractors are still working on the Norman site to complete the assemblies and test the future nuclear reactor, these ultrasonic tests were conducted as part of the “initial comprehensive visit”, which allows establish a “zero” state of the installation before it is put into service. Following the detected quality discrepancies, EDF decided to “carry out additional checks on the 150 welds concerned of the main secondary circuit,” said the prime contractor, who will conduct an expertise in parallel to understand the causes of these discrepancies. . Work that should be completed by the end of May.
Les Echos 12th April 2018 read more »
[Machine Translation] EPR Flamanville: the Nuclear Safety Authority criticizes “a lack of surveillance” ASN President Pierre-Franck Chevet describes the new anomalies discovered on third-generation reactor welds as “serious”. The President of the Nuclear Safety Authority (ASN), Pierre-Franck Chevet, came back in harsh terms, Thursday, April 12 in the Senate, on new weld defects unearthed Tuesday on the EPR Flamanville (Channel). An anomaly that he considered “serious” before the Parliamentary Office for evaluating scientific and technological choices, to which he presented the annual report on the state of nuclear safety and radiation protection in France . He had already used the same qualifier in February, about first “deviations” detected in the realization of certain welds piping connecting the steam generators (four in the EPR) to the turbine. Thirty-eight welds were involved. But, at that time, EDF was assured, these were deviations from a “high quality” standard , more demanding than the standard standards applied to nuclear pressure equipment, so that, according to the electrician, these circuits remained ” able to carry out their mission safely . ” The problem is actually more extensive than EDF then heard . At the end of March, the company discovered, during the “initial complete visit” prior to the commissioning of the third-generation reactor, new “quality deviations” . And this time, not in relation to increased safety requirements, but compared to the normal regulations for this type of equipment.
Le Monde 12th April 2018 read more »
EDF should consider extending checks on welds in the main secondary system of the EPR reactor under construction at Flamanville to other systems, the French nuclear safety regulator has said. Welding flaws were not detected during the manufacturing checks performed by subcontractors of Framatome but were identified during pre-service inspections by EDF prior to commissioning.
World Nuclear News 12th April 2018 read more »