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  • Information notice No. 6: ASN remains vigilant and is pursuing its inspect ...
    already been completed and proceeded with the repair work required to ensure that the defects found would not have any impact on the containment function provided by the liner Secondly EDF and the Contract Holder carrying out the liner welds submitted an action plan to ASN on 15 April 2009 designed to significantly improve the quality of these welds The key points of this action plan involve optimising the weld process and the conditions in which welding is performed improving training for welders and stricter monitoring on weld operations Pending assessment of how effective this action plan turns out to be radiographic tests have been performed on 100 of the welds already done Lettre d information 6 epr View of site bottom of liner EDF Implementation of the action plan was examined as part of the inspection of 22 April 2009 see next Newsletter The inspectors thought that this action plan should serve to improve weld quality However there has not yet been enough feedback to assess the relevance and effectiveness of the actions implemented in concrete terms Monthly reviews of the action plan have been sent to ASN since 15 May 2009 In July 2009 EDF submitted evidence to ASN of controls performed on weld operations The results of the radiographic shots performed over a period of one month of welding mainly showed acceptable repair rates less than 10 On this basis EDF has decided to suspend radiographic tests while maintaining closer monitoring over weld operations ASN believes that the actions implemented by EDF are likely to improve control over weld operations ASN will nonetheless continue to monitor these operations closely ASN inspections During the first six months of 2009 ASN inspectors carried out 16 inspections at the Flamanville 3 construction site focusing on Civil engineering Safety management Impact of the worksite on reactors in operation Emergency response organisation and resources Management of sources of ionising radiation Services Workplace inspections Lettre d information 6 epr Thanks to these inspections it has been ascertained that the action plan implemented by EDF following the identification in 2008 of several anomalies related to civil engineering operations has resulted in a significant improvement in the quality of the works as well as in monitoring concreting and reinforcement activities Nonetheless during the inspection performed on 28 May 2009 regarding preparatory work for the concreting work on the foundation raft for the internal structures of the Reactor Building the inspectors and their technical support agency alerted EDF to the fact that a significant number of tasks still had to be completed before going ahead with the concreting operation under the best conditions Following this inspection and after the concreting work had been carried out ASN found that a number of nonconformance files had been opened ASN considers that the problems found by EDF and the Contract Holder notably an insufficient volume of concrete poured in places and modifications to the formwork during concreting operations do not impact on the safety of the structure These problems

    Original URL path: http://www.french-nuclear-safety.fr/Inspections/Supervision-of-the-epr-reactor/ASN-s-supervision-of-the-Flamanville-3-reactor-construction-EPR-News/Information-notice-No.-6-ASN-remains-vigilant-and-is-pursuing-its-inspect (2016-01-29)
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  • Information notice No.5: ASN keeps a close watch on construction work ...
    the epr reactor ASN s supervision of the Flamanville 3 reactor construction EPR News ASN s supervision principles for the construction of the Flamanville 3 reactor Resources Project concerning the installation of an EPR type reactor on the Penly site Back to news list Information notice No 5 ASN keeps a close watch on construction work on the future Flamanville 3 reactor 12 02 2009 5 50 pm Note d information During the last quarter of 2008 ASN continued its inspection activities on the construction site of the Flamanville 3 EPR Highlights of this work included Manufacturing of the liner metal lining designed to seal the containment ASN carried out several inspections of liner welds in the Flamanville 3 EPR reactor building These inspections revealed 1 deviations from liner technical requirements concerning in particular the welding methods used the climatic conditions during welding operations and the welding data package available to welders 2 inadequacies in the application of the Order of 10 August 1984 relating to the quality of the design construction and operation of basic nuclear installations particularly with respect to the qualification of the liner pre manufacturing shop on the Flamanville 3 site monitoring of welding operations and non destructive testing of welds and lastly the quality management system of the company responsible for liner welding ASN considered that the high rate of repair on some welds was an indication that liner welding conditions were not adequately controlled It consequently asked EDF to demonstrate that the liner could guarantee containment safety under such conditions and if necessary propose additional tests and inspections In the meantime ASN asked EDF on 12 December 2008 to suspend any irreversible operations that would be incompatible with additional weld inspections On 4 February 2009 following an in depth examination of the supporting material provided by EDF and after consulting the IRSN ASN asked EDF to take the following steps For welds already completed provide additional data to that already transmitted in particular concerning tests to be carried out on welds representative of those found on the site inspect 100 of certain types of weld ASN considers that the proposals already submitted by EDF for the other welds will avoid any impact on the liner s containment function For future welds submit an action plan aimed at making a significant improvement to the quality of these welds with a monthly report on the actual implementation of the plan and make an assessment of its effectiveness after 6 months application on site inspect 100 of welds until a significant improvement in their quality has been confirmed Reinforcement operations rebars Following the recurring defects in concrete reinforcement operations reported during the first six months of 2008 on the Flamanville 3 site see information letters 2 3 and 4 ASN asked EDF on 17 June 2008 to implement an action plan to remedy this problem During their inspection on 17 December 2008 ASN inspectors appraised the effectiveness of the plan and noted an improvement in the quality

    Original URL path: http://www.french-nuclear-safety.fr/Inspections/Supervision-of-the-epr-reactor/ASN-s-supervision-of-the-Flamanville-3-reactor-construction-EPR-News/Information-notice-No.5-ASN-keeps-a-close-watch-on-construction-work (2016-01-29)
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  • EPR Reactor Flamanville 3
    spent fuel management IAEA Safety Reviews and Appraisals in France OSART Mission conducted in France WENRA Reports Section map Section map International International reference texts Euratom Treaty IAEA safety standards International conventions Bilateral relations ASN s counterparts Personnel exchanges between ASN and its foreign counterparts Multilateral relations in Europe The European Union Clubs of Nuclear Safety and Radiation Protection Authorities Other organisations Multilateral assistance plans Multilateral relations outside Europe International Atomic Energy Agency Nuclear Energy Agency of the OECD Other UN organisations Other associations of nuclear safety and radiation protection authorities International Commission on Radiological Protection Section map Home Inspections Supervision of the epr reactor ASN s supervision of the Flamanville 3 reactor construction EPR News EPR Reactor Flamanville 3 Print Mettre en favoris Share on Inspections European stress tests Supervision of the epr reactor ASN s supervision of the Flamanville 3 reactor construction EPR News ASN s supervision principles for the construction of the Flamanville 3 reactor Resources Project concerning the installation of an EPR type reactor on the Penly site Back to news list Flamanville 3 The French Nuclear Safety Authority ASN enacts prescriptions for the EPR reactor being built at Flamanville in the Manche Department France 10 10 2008 12 00 am Note d information In application of the Act on transparency and security in the nuclear field TSN of 13 June 2006 ASN defined by a decision of 26 September 2008 the prescriptions for the Flamanville 3 EPR reactor currently being built on the Flamanville site This first series of 58 prescriptions 1 defines technical requirements related to the detailed design of the facility These prescriptions were established from technical instructions issued by the Institute for Radiation Protection and Nuclear Safety IRSN and the recommendations of the permanent group of nuclear reactor experts allowing ASN to

    Original URL path: http://www.french-nuclear-safety.fr/Inspections/Supervision-of-the-epr-reactor/ASN-s-supervision-of-the-Flamanville-3-reactor-construction-EPR-News/EPR-Reactor-Flamanville-3 (2016-01-29)
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  • Information notice No.4: ASN continues to implement its inspection ...
    International conventions Bilateral relations ASN s counterparts Personnel exchanges between ASN and its foreign counterparts Multilateral relations in Europe The European Union Clubs of Nuclear Safety and Radiation Protection Authorities Other organisations Multilateral assistance plans Multilateral relations outside Europe International Atomic Energy Agency Nuclear Energy Agency of the OECD Other UN organisations Other associations of nuclear safety and radiation protection authorities International Commission on Radiological Protection Section map Home Inspections Supervision of the epr reactor ASN s supervision of the Flamanville 3 reactor construction EPR News Information notice No 4 ASN continues to implement its inspection Print Mettre en favoris Share on Inspections European stress tests Supervision of the epr reactor ASN s supervision of the Flamanville 3 reactor construction EPR News ASN s supervision principles for the construction of the Flamanville 3 reactor Resources Project concerning the installation of an EPR type reactor on the Penly site Back to news list Information notice No 4 ASN continues to implement its inspection programme on the Flamanville 3 EPR site 11 09 2008 5 48 pm Note d information ASN continued its inspection activities at the Flamanville 3 construction site during the 3rd quarter of 2008 The most significant points relating to these inspections are as follows Sampling and testing concrete samples from the Flamanville 3 site During concrete pouring operations on the reactor building platform ASN had concrete samples taken by an independent laboratory to verify the properties of the concrete used on the site Tests on these samples demonstrated that the mechanical strength of the concrete used for these operations was satisfactory Analysis of the action taken to remedy the reinforcement problem reported to ASN on 21 May 2008 On 21 May 2008 EDF informed ASN of a problem concerning the rebars in a part of the foundation raft

    Original URL path: http://www.french-nuclear-safety.fr/Inspections/Supervision-of-the-epr-reactor/ASN-s-supervision-of-the-Flamanville-3-reactor-construction-EPR-News/Information-notice-No.4-ASN-continues-to-implement-its-inspection (2016-01-29)
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  • Information notice No.3: ASN authorises the resumption of concrete pouring ...
    March 2007 Symposium international NuPEER Convention on Nuclear Safety Joint Convention on the safety of spent fuel management IAEA Safety Reviews and Appraisals in France OSART Mission conducted in France WENRA Reports Section map Section map International International reference texts Euratom Treaty IAEA safety standards International conventions Bilateral relations ASN s counterparts Personnel exchanges between ASN and its foreign counterparts Multilateral relations in Europe The European Union Clubs of Nuclear Safety and Radiation Protection Authorities Other organisations Multilateral assistance plans Multilateral relations outside Europe International Atomic Energy Agency Nuclear Energy Agency of the OECD Other UN organisations Other associations of nuclear safety and radiation protection authorities International Commission on Radiological Protection Section map Home Inspections Supervision of the epr reactor ASN s supervision of the Flamanville 3 reactor construction EPR News Information notice No 3 ASN authorises the resumption of concrete pouring Print Mettre en favoris Share on Inspections European stress tests Supervision of the epr reactor ASN s supervision of the Flamanville 3 reactor construction EPR News ASN s supervision principles for the construction of the Flamanville 3 reactor Resources Project concerning the installation of an EPR type reactor on the Penly site Back to news list Information notice No 3 ASN authorises the resumption of concrete pouring work on the EPR site 19 06 2008 5 46 pm Note d information ASN has authorised EDF to resume concrete pouring operations on safety related structures of the EPR reactor on the site of Flamanville 3 Following the detection of several deviations in concrete structural work early in 2008 ASN asked EDF on 26 May to suspend its operations and to submit a corrective action plan Although these recurrent anomalies did not directly affect safety ASN considered that they highlighted a lack of rigour from the operator and external service

    Original URL path: http://www.french-nuclear-safety.fr/Inspections/Supervision-of-the-epr-reactor/ASN-s-supervision-of-the-Flamanville-3-reactor-construction-EPR-News/Information-notice-No.3-ASN-authorises-the-resumption-of-concrete-pouring (2016-01-29)
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  • Information notice No.2: ASN asks EDF for tighter control on construction work
    spent fuel management IAEA Safety Reviews and Appraisals in France OSART Mission conducted in France WENRA Reports Section map Section map International International reference texts Euratom Treaty IAEA safety standards International conventions Bilateral relations ASN s counterparts Personnel exchanges between ASN and its foreign counterparts Multilateral relations in Europe The European Union Clubs of Nuclear Safety and Radiation Protection Authorities Other organisations Multilateral assistance plans Multilateral relations outside Europe International Atomic Energy Agency Nuclear Energy Agency of the OECD Other UN organisations Other associations of nuclear safety and radiation protection authorities International Commission on Radiological Protection Section map Home Inspections Supervision of the epr reactor ASN s supervision of the Flamanville 3 reactor construction EPR News Information notice No 2 ASN asks EDF for tighter control on construction work Print Mettre en favoris Share on Inspections European stress tests Supervision of the epr reactor ASN s supervision of the Flamanville 3 reactor construction EPR News ASN s supervision principles for the construction of the Flamanville 3 reactor Resources Project concerning the installation of an EPR type reactor on the Penly site Back to news list Information notice No 2 ASN asks EDF for tighter control on construction work 02 06 2008 5 43 pm Note d information View taken on 25 October 2007 AFP MYCHELE DANIAU During its inspection activities concerning the construction of the EPR ASN has detected several anomalies in concrete structural work since the beginning of 2008 On 21 May 2008 EDF informed ASN about an issue concerning the rebars in a part of the foundation raft of a building designed to house some of the reactor safeguard systems This problem was reported after several others the last of which concerning rebars in the foundation raft of the future spent fuel storage building was detected by ASN

    Original URL path: http://www.french-nuclear-safety.fr/Inspections/Supervision-of-the-epr-reactor/ASN-s-supervision-of-the-Flamanville-3-reactor-construction-EPR-News/Information-notice-No.2-ASN-asks-EDF-for-tighter-control-on-construction-work (2016-01-29)
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  • EPR Reactor: Information notice No.1
    of spent fuel management IAEA Safety Reviews and Appraisals in France OSART Mission conducted in France WENRA Reports Section map Section map International International reference texts Euratom Treaty IAEA safety standards International conventions Bilateral relations ASN s counterparts Personnel exchanges between ASN and its foreign counterparts Multilateral relations in Europe The European Union Clubs of Nuclear Safety and Radiation Protection Authorities Other organisations Multilateral assistance plans Multilateral relations outside Europe International Atomic Energy Agency Nuclear Energy Agency of the OECD Other UN organisations Other associations of nuclear safety and radiation protection authorities International Commission on Radiological Protection Section map Home Inspections Supervision of the epr reactor ASN s supervision of the Flamanville 3 reactor construction EPR News EPR Reactor Information notice No 1 Print Mettre en favoris Share on Inspections European stress tests Supervision of the epr reactor ASN s supervision of the Flamanville 3 reactor construction EPR News ASN s supervision principles for the construction of the Flamanville 3 reactor Resources Project concerning the installation of an EPR type reactor on the Penly site Back to news list EPR Reactor Information notice No 1 29 04 2008 5 32 pm Note d information Anomalies have been reported which is to be expected on such a large construction site examples are given below In ASN s opinion these anomalies have been Stacks under construction around cranes Vue du chantier fond du liner EDF properly remedied The Authority nevertheless considers that EDF should reinforce the leading and the monitoring of subcontractors activities on the site and when their technical skills are found satisfactory action should be taken to develop their safety culture Since work began ASN has examined the following anomalies in particular 1 Not enough consideration has been given to the consequences of a site crane falling on a reactor

    Original URL path: http://www.french-nuclear-safety.fr/Inspections/Supervision-of-the-epr-reactor/ASN-s-supervision-of-the-Flamanville-3-reactor-construction-EPR-News/EPR-Reactor-Information-notice-No.1 (2016-01-29)
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  • Reactor vessel head for the Flamanville EPR
    counterparts Personnel exchanges between ASN and its foreign counterparts Multilateral relations in Europe The European Union Clubs of Nuclear Safety and Radiation Protection Authorities Other organisations Multilateral assistance plans Multilateral relations outside Europe International Atomic Energy Agency Nuclear Energy Agency of the OECD Other UN organisations Other associations of nuclear safety and radiation protection authorities International Commission on Radiological Protection Section map Home Information News releases Reactor vessel head for the Flamanville EPR Print Mettre en favoris Share on Information News releases Publications ASN s videos Back to news list ASN inspects weld repairs on the reactor vessel head for the Flamanville EPR 26 04 2011 10 49 am Note d information 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 Purpose and location of EPR vessel head nozzles Nuclear power plant reactor vessel heads are penetrated by nozzles which are designed to allow control rod drive mechanisms and core monitoring instruments through the vessel head into the reactor vessel It is the control rod drive mechanism that controls the nuclear reaction inside the reactor core The EPR vessel head totals more than a hundred such penetrations Under normal operating conditions the pressure inside a nuclear reactor is very high reaching a value of 155 bar Each component passing through the vessel head is welded to the inner surface Welding involves depositing several layers of metal and each weld undergoes regular inspection both during and after the operation using various methods Diagram of vessel head nozzles and welds ASN asked AREVA NP to propose corrective action as these nozzles are important for ensuring reactor vessel pressure resistance In order to restore the required quality level AREVA NP proposed reworking all vessel head nozzle welds

    Original URL path: http://www.french-nuclear-safety.fr/Information/News-releases/Reactor-vessel-head-for-the-Flamanville-EPR (2016-01-29)
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