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  • Cattenom NPP reactor 1: emergency organisation and conducted a reactive inspection on the site
    line led to a rapid rise in the steam flow in this SG and a drop in its pressure and level Figure n 2 This led to excess cooling of the reactor coolant system and contraction of the reactor coolant measured by the rapid fall of the water level and of the pressure in the pressuriser Figure n 3 When the low water level was detected in SG1 with excessive cooling of the reactor coolant system the protection system automatically shut down the reactor isolated the containment and activated safety injection 3 In accordance with the operating rules reactor shutdown to a safe state was initiated The GCTa line was thus isolated by closing the steam isolation valve GCT 011 VV located upstream of the faulty blowdown valve Cooling was then provided by the three unaffected steam generators until pressure and temperature conditions were reached in the reactor coolant system such as to allow connection of the reactor at shutdown cooling system These conditions were reached at 18h00 Figure n 4 Actual consequences The event caused a sudden drop in pressure and level in SG 1 and may have damaged 4 the internal structures of this steam generator The information recorded by the measurement channels continuously monitoring the radioactivity of the secondary system revealed no rise in activity liable to result from damage to a tube of the steam generator affected No increase in radioactivity was measured on the site or in the nuclear power plant s environment Potential consequences The event which occurred on 28 th May 2015 is a design basis accident considered in the design of the NPP reactors The loss of integrity of the secondary system is a reactivity accident it leads to excess cooling of the reactor coolant system which causes a rise in the nuclear power of the reactor and finally a rise in the temperature of the fuel liable to lead to its significant deterioration if the protection and safeguard systems were to fail With regard to the potential consequences for individuals and the environment this accident led to the release of steam into the environment from the secondary system as happens during the reactor start up and shutdown phases Conservation of the integrity of the reactor coolant system is a major issue In the event of rupture of one or more tubes on the SG affected the radioactive contamination of the reactor coolant system can then be released into the environment In a situation such as this the reactor control strategy would have led to the pressure in the reactor coolant system being reduced more rapidly to cancel out the leak between the reactor coolant and secondary systems ASN Actions GCT 021 VV valve undergoing repairs EDF Cattenom NPP Enlarge the visual ASN activated its emergency center in Montrouge with the technical support of the IRSN emergency center ASN Strasbourg division immediately placed a staff member at the disposal of the Metz Prefect s office while a team of nuclear safety inspectors

    Original URL path: http://www.french-nuclear-safety.fr/Information/News-releases/Cattenom-NPP-reactor-1-emergency-organisation-and-conducted-a-reactive-inspection-on-the-site (2016-01-29)
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  • End of the incident at nuclear power plant of Cattenom (Moselle)
    for complementary safety assessments ASN resolutions ASN report Targeted inspections Operators reports french only European stress tests CSA Videos Supervision of the epr reactor Principles for the construction of EPR Resources Project concerning the installation of an EPR at Penly Section map ASN About ASN Activities monitored by ASN The ASN doctrine The ASN strategy The ASN commission The ASN organisation Contact us Technical support ASN s Scientific Committee The IRSN The Advisory Committees Approving organisations and laboratories ASN s other technical support organisations Professional events Radon national action plan workshop International Conference on Modern Radiotherapy 2 4 December 2009 IAEA ASN workshop 22 23 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 Information News releases End of the incident at nuclear power plant of Cattenom Moselle Print Mettre en favoris Share on Information News releases Publications ASN s videos Back to news list End of the incident at nuclear power plant of Cattenom Moselle 28 05 2015 6 30 pm Communiqué de presse The incident which affected reactor No 1 at Cattenom nuclear power plant Moselle has been terminated The reactor is shut down and being cooled normally EDF has exited its emergency

    Original URL path: http://www.french-nuclear-safety.fr/Information/News-releases/End-of-the-incident-at-nuclear-power-plant-of-Cattenom-Moselle (2016-01-29)
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  • Cattenom (Moselle) - level 1 on the international INES scale
    EPR Resources Project concerning the installation of an EPR at Penly Section map ASN About ASN Activities monitored by ASN The ASN doctrine The ASN strategy The ASN commission The ASN organisation Contact us Technical support ASN s Scientific Committee The IRSN The Advisory Committees Approving organisations and laboratories ASN s other technical support organisations Professional events Radon national action plan workshop International Conference on Modern Radiotherapy 2 4 December 2009 IAEA ASN workshop 22 23 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 Information News releases Cattenom Moselle level 1 on the international INES scale Print Mettre en favoris Share on Information News releases Publications ASN s videos Back to news list ASN preliminarily ranks the event at the nuclear power plant of Cattenom Moselle at level 1 on the international INES scale 28 05 2015 5 45 pm Communiqué de presse According to preliminary information available to ASN the origin of the event that occurred at the reactor n 1 of the Cattenom NPP Moselle was an unexpected opening of a secondary system valve which resulted in a steam release The reactor was automatically shut down at 13 25 according to procedures

    Original URL path: http://www.french-nuclear-safety.fr/Information/News-releases/Cattenom-Moselle-level-1-on-the-international-INES-scale (2016-01-29)
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  • Incident in the nuclear power plant of Cattenom (Moselle)
    ASN About ASN Activities monitored by ASN The ASN doctrine The ASN strategy The ASN commission The ASN organisation Contact us Technical support ASN s Scientific Committee The IRSN The Advisory Committees Approving organisations and laboratories ASN s other technical support organisations Professional events Radon national action plan workshop International Conference on Modern Radiotherapy 2 4 December 2009 IAEA ASN workshop 22 23 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 Information News releases Incident in the nuclear power plant of Cattenom Moselle Print Mettre en favoris Share on Information News releases Publications ASN s videos Back to news list Activation of ASN Emergency Center following an incident in the nuclear power plant of Cattenom Moselle 28 05 2015 5 00 pm Communiqué de presse The French Nuclear Safety Authority ASN has been informed by EDF at 14 25 that an event occurred at the Cattenom nuclear power plant in reactor N o 1 According to preliminary information available to ASN the cause of the event is the unexpected opening of a valve in the secondary circuit The reactor was automatically shut down A safety water injection was initiated There has been no radioactive

    Original URL path: http://www.french-nuclear-safety.fr/Information/News-releases/Incident-in-the-nuclear-power-plant-of-Cattenom-Moselle (2016-01-29)
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  • Transport incident of a gamma ray projector
    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 Information News releases Transport incident of a gamma ray projector Print Mettre en favoris Share on Information News releases Publications ASN s videos Back to news list ASN rates level 2 on the INES scale a transport incident of a gamma ray projector which took place between St Pol sur Mer 59 and Courcelles les Lens 62 27 05 2015 2 00 pm Communiqué de presse On 16 th March 2015 ASN was informed by the ECW company Courcelles les Lens that one of their gamma ray projects had been carried on the public highway on 2 nd March 2015 in conditions failing to comply with a number of requirements stipulated by the transport approval issued by ASN Indeed the device was not in the closed and locked position and was equipped with its site accessories which prevented it from being fully inserted into its transport casing These deviations increased the risk of ejection of the radioactive source from its shielding in the event of an accident and could have led to the irradiation of the individuals in the immediate vicinity of the accident site Following notification of this event ASN carried out two reactive inspections in the premises of the ECW agency on 26 th March and 14 th April The

    Original URL path: http://www.french-nuclear-safety.fr/Information/News-releases/Transport-incident-of-a-gamma-ray-projector (2016-01-29)
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  • Meeting between European radiation protection authorities and major stakeholders
    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 Meeting between European radiation protection authorities and major stakeholders Print Mettre en favoris Share on Information News releases Publications ASN s videos Back to news list Meeting between European radiation protection authorities and major stakeholders on the optimised use of CT scanners 22 04 2015 3 30 pm Communiqué de presse On 1 st April HERCA Heads of the European Radiological protection Competent Authorities organised a multi stakeholder meeting kindly hosted by the French Nuclear Safety Authority ASN in its premises in Paris The stakeholders included COCIR 1 supported by the main manufacturers of CT equipment GE Philips Siemens and Toshiba the professional organisations ESR ESPR EFRS EANM ESTRO and EFOMP the international organisations IAEA EC and the US FDA present as observers The objective of the meeting was to exchange views with a variety of key stakeholders on issues with regard to the optimised use of computed tomography CT scanners The ultimate goal of this effort on dose optimisation is to ensurethe best patient care by providing an optimised balance between image quality and dose A recently published HERCA position paper on the process of CT dose optimisation through education and training and the role of CT manufacturers was also discussed Among medical exposures CT is the most important source of exposures to radiation in many developed countries today For this reason it is important to ensure that CT dose is commensurate with the clinical purpose of the examination Balancing patient s radiation dose and diagnostic image quality is of great importance This process can only be achieved if all the stakeholders involved work together as a team and are educated and

    Original URL path: http://www.french-nuclear-safety.fr/Information/News-releases/Meeting-between-European-radiation-protection-authorities-and-major-stakeholders2 (2016-01-29)
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  • ASN 2014 Report
    initiated in research and fuel cycle facilities will entail major complex programmes as of 2015 involving considerable work to reinforce the facilities With regard to EDF s nuclear power plants ASN observed an improvement in the control of reactor outages in 2014 The management of operations is on the whole satisfactory Even if the number of significant safety events is slightly down the sites must nonetheless continue their efforts with regard to the quality of maintenance and operation The causes of these events lay more particularly in insufficient preparation of the activities or erroneous application or interpretation of operating documents ASN applauds the efforts made by EDF concerning on site emergency plans and the revision of the emergency response organisation in order to incorporate the nuclear rapid intervention force FARN With regard to skills management and in the light of the work to be done by EDF ASN considers that the licensee must continue with the efforts it has made in terms of recruiting and training Of the EDF sites Saint Laurent des Eaux stands out in several respects The Bugey Chinon and Cattenom sites would appear to be under performing With regard to the facilities of the Arevagroup ASN will be particularly attentive to compliance with the deadlines concerning the legacy waste recovery and packaging programme RCD on the La Hague site The ASN resolution of 9 th December 2014 regulates the progress and performance of this programme according to the safety implications of the operations With regard to the FBFC site at Romans sur Isère placed under reinforced surveillance by ASN the initial results of an inspection conducted by ASN are on the whole positive ASN will check that this positive trend is maintained in the long term Concerning CEA ASN considers that the its major commitments approach adopted in 2006 is on the whole satisfactory and must be continued and enhanced ASN will remain vigilant in ensuring compliance with the commitments made by CEA both for its facilities in service and those being decommissioned Similarly ASN will remain vigilant in ensuring that CEA performs exhaustive periodic safety reviews of its facilities so that ASN can conduct its examinations in satisfactory conditions and so that the safety of the facilities benefits from the necessary improvements In the medical field ASN considers that radiation protection must remain a national priority Actions will be continued in this field with two main challenges controlling the doses delivered to the patients in imaging and radiotherapy and the exposure of health professionals in the operating theatres In 2014 ASN was notified of two incidents rated level 2 on the INES scale involving doses received by physicians during imaging procedures Interventional radiology inspections showed the need to draft and follow specific procedures and increase the involvement of medical physicians and persons competent in radiation protection The ASN Chairman Pierre Franck Chevet was keen to insist on the following points In 2014 operation of the nuclear facilities was satisfactory with regard to both nuclear safety

    Original URL path: http://www.french-nuclear-safety.fr/Information/News-releases/ASN-2014-Report (2016-01-29)
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  • Flamanville EPR reactor vessel manufacturing anomalies
    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 Information News releases Flamanville EPR reactor vessel manufacturing anomalies Print Mettre en favoris Share on Information News releases Publications ASN s videos Back to news list Flamanville EPR reactor vessel manufacturing anomalies 07 04 2015 11 30 am Communiqué de presse ASN has been informed by AREVA of an anomaly in the composition of the steel in certain zones of the reactor vessel head and reactor vessel bottom head of the Flamanville EPR EPR reactor vessel Enlarge the visual The nuclear pressure equipment regulation requires that the manufacturer limits the risks of heterogeneity in the materials used for manufacturing the components most important for safety In order to address this technical requirement AREVA carried out chemical and mechanical tests on a vessel head similar to that of the Flamanville EPR The results of these tests in late 2014 revealed the presence of a zone in which there was a high carbon concentration leading to lower than expected mechanical toughness 1 values Initial measurements confirmed the presence of this anomaly in the reactor vessel head and reactor vessel bottom head of the Flamanville EPR ASN received a proposal from AREVA for a further detailed test campaign on a representative vessel head starting in April 2015 in order to precisely identify the location of the zone concerned and its mechanical properties ASN will

    Original URL path: http://www.french-nuclear-safety.fr/Information/News-releases/Flamanville-EPR-reactor-vessel-manufacturing-anomalies (2016-01-29)
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