Abstracts ASN Report 2019

JȸƏɮƺǼǣȇƺɀ ȇɖƬǼƺƏȸ ȵȒɯƺȸ ȵǼƏȇɎ The Gravelines NPP operated by EDF is located in the Nord département on the shores of the North Sea, between Calais and Dunkerque. This NPP comprises six 900 MWe pressurised water reactors, representing a total power of ד ً ג ׎׎ xáƺِ «ƺƏƬɎȒȸɀ ׏ ƏȇƳ א ƬȒȇɀɎǣɎɖɎƺ zX החژ ً ȸƺƏƬɎȒȸɀ ב ƏȇƳ ג zX וחژ ƏȇƳ ȸƺƏƬɎȒȸɀ ד ƏȇƳ ה zX ژ ׏ אא ِ ASN considers that the radiation protection and environmental protection performance of the Gravelines NPP is, on the whole, in line with the general assessment of EDF plant performance, but its nuclear safety results are below the general average. The improvement in nuclear safety performance perceived in 2018, especially during the in-depth inspection carried out from 14 to 18 May 2018, did not continue in 2019. ASN notes more specifically a downturn in the results concerning the reliability enhancement of practices. The licensee must also remain attentive to the availability of systems associated with the cooling function. On the maintenance front, 2019 was marked by problems affecting the pumps and pipes carrying seawater. Furthermore, some items of equipment providing protection against external hazards display corrosion phenomena that could call into question their effectiveness. The licensee must respond to the recurrent problems of corrosion on the facilities. As regards environmental protection, ASN considers that the Gravelines NPP must improve its management of the maintenance of the facilities for treating the radioactive effluents produced by the operation of the reactors. With regard to radiation protection, ASN continues to find weaknesses in the control of access to certain areas presenting radiological exposure risks. Improvements are also expected in the monitoring of worksites involving internal contamination risks which were the cause of significant radiation protection events in 2019. Forty-one labour inspection operations were carried out in the Gravelines NPP in 2019. The inspections are divided between inspections conducted on themaintenance worksites, particularly during reactor outages, and thematic inspections (exposure to chemical risks, lifting risks). Meetings were also organised with senior management, members of the Health, Safety and Working Conditions Committee (CHSCT) and personnel representatives. ASN requested the organisation of technical meetins on specific subjects, such as the risks involved in replacing the steam generators on reactor 5 or the site’s organisation for the management of risks and safety at work. ASN effectively remains attentive to the training of operators working at height and to the precautions to be taken when lifting loads. No serious accidents occurred in 2019. The ASN labour inspector did however order a temporary work stoppage after observing a dangerous situation on the ultimate backup diesel generator set worksite. ¨ȒǼǼɖɎƺƳ ɀǣɎƺɀ ƏȇƳ ɀȒǣǼɀ ƏȇƳ ȅǣȇǣȇǕ ɀǣɎƺɀ ASN continued its action and assisted the Dreal with safety recommendations concerning radiation protection for a clean-up project for the PCUK ( Produits Chimiques Ugine-Kuhlmann ) brownfield site, on which phosphogypsum residues are stored. 60 ASN Report on the state of nuclear safety and radiation protection in France in 2019 REGIONAL OVERVIEWOF NUCLEAR SAFETY AND RADIATION PROTECTION R ÈÁ³ (ٳ 0 ٳ I« z!0