EDF_REGISTRATION_DOCUMENT_2017

PRESENTATION OF EDF GROUP Description of the Group's activities

is based on the cumulative experience of a standardised fleet of 58 reactors (i.e., ■ more than 1,700 reactor-years of operation, the arithmetic sum of years of operation of EDF’s pressurized water reactor (PWR)); incorporates a continuous improvement approach that is notably embodied by ■ the ongoing efforts to decrease the number of automatic reactor trips; benefits from integrated nuclear engineering and Research & Development within ■ the Group in order to anticipate the correction of failures, maintain the facilities in good working order, develop equipment on an ongoing basis, reassess safety margins and monitor technology advances, as well as the implementation of more effective new technologies and the management of sites being decommissioned; relies strongly on the development of skills; with this objective in mind, each ■ nuclear generation site is equipped with a simulator used for training to cope with any type of situation. Nuclear safety is subject to numerous controls, both internal and external. EDF has implemented internal control procedures. For example, every three to ■ four years, EDF performs overall safety assessments for each nuclear power plant, which take place over a three-week period and involve approximately 30 inspectors. In addition, the General Inspector for nuclear safety and radiation protection, reporting to and appointed by EDF’s Chairman and CEO, performs annual audits, issues an opinion on the overall safety of the nuclear fleet and suggests improvement actions to the Company’s management. Efforts by EDF, notably to improve human performance, have resulted in a halving over ten years of the annual average number of automatic reactor trips. In 2017, they totalled 22 throughout the fleet. The external control of the safety of nuclear facilities in France is carried out by ■ the ASN, at the national level, there are two types of audits: scheduled or unannounced inspections carried out by the ASN (473 ■ inspections in 2017 over all EDF nuclear facilities); a periodic (ten-year) review process designed to improve the compliance of ■ nuclear plants with applicable rules and update assessments of the risks facilities pose to the environment and public health, taking into account the state of the facilities, the experience gained during their operation, new developments in nuclear science, and rules applying to similar facilities. The targets are established by the ASN which monitors compliance; EDF proposes solutions to meet these targets and implements them after obtaining the approval of the ASN (see section 1.4.1.1.1 “EDF’s nuclear fleet”). The periodic review is an important step in continuing the operation of power plants (see sections 1.4.1.1.5 “Preparing for the future of the nuclear fleet in France” and 1.5.6.2.2 “Specific regulations applicable to basic nuclear facilities”). At the international level, regular inspections are held making it possible to share the experience gained worldwide: the OSART (Operational Safety Review Team) of the IAEA (International Atomic ■ Energy Agency) performs reviews at the request of the French government with the objective of formulating recommendations and promoting best practices. In particular, EDF’s first Corporate OSART was held in 2014 and concluded that EDF is fully compliant with the standards defined by the IAEA; the Follow Up Corporate OSART took place at the end of 2016; the international “peer review” inspections carried out by the WANO (World ■ Association of Nuclear Operators) are organised at the request of EDF to assess safety performance compared to best international working practices. A Corporate Peer Review took place in 2017 aimed at assessing the mode of governance and relations between corporate HQ and the facilities. At the end of the Corporate Peer Review WANO identified two best practices to do with applying the Nuclear Rapid Action Force (FARN) under the Post-Fukushima resilience programme and with using digital technology to train maintenance workers. WANO also issued four recommendations (two relating to Corporate Leadership and Governance, one dealing with Monitoring and Oversight of Contractors and one to do with Completeness of Independent Oversight) which will lead to an action plan.

Under this programme, the planned renovation or replacement of major components of power stations such as generators, transformers or steam generators will continue. At end 2017: the alternator generators were renovated on 45 units, for a total of 49 units to ■ renovate; the programme for preventive replacement of the poles in the main transformers ■ is ongoing. 116 main transformer poles out of 173 were replaced, i.e. approximately 66.5% of the programme; the steam generators of 28 out of the 34 units of the 900MW series were ■ replaced. Industrial work will continue beyond 2025 on the occasion of the third and fourth series of ten-year inspections of 1300MW units, the fourth series of ten-year inspections of 900MW units and the second and third series of ten-year inspections of N4 units. This programme will provide the opportunity to incorporate additional safety improvements identified following the Fukushima accident as well as modifications allowing the operation of facilities to be extended significantly beyond 40 years (see section 1.4.1.1.5 “Preparing for the future of the nuclear fleet in France”). Environment, nuclear safety, radiation 1.4.1.1.3 protection Environmental protection EDF bases its environmental procedure on an ISO 4001-certified management system (see section 3.1.8.2 “Management and prevention of environmental risks” – “The environmental management system (SME)”), rolled out in 2002 at a number of sites and then extended to all nuclear generation units. In terms of radioactive waste management, Very Low-Level Waste (VLLW) has been removed to the Morvilliers storage facility in the Aube since 2004. Concerning Low- and Intermediate-Level operating Waste (LILW), EDF is continuing to take steps to limit its intermediate storage on all nuclear sites and relies on the Centraco factory (SOCODEI, a subsidiary of the EDF group), where the melting oven was restarted in 2015 and which is now operating normally. For a description of radioactive waste processing downstream of the fuel cycle as well as decommissioning, see sections 1.4.1.1.4 “The nuclear fuel cycle and related EDF, in its capacity as a nuclear operator, takes responsibility for nuclear safety and, in a rapidly-changing context (market competition, environmental issues, etc.), reaffirms as its absolute priority the protection of the human and environmental health, among other things, through the prevention of accidents and the limiting of their consequences as regards nuclear safety. Moreover, the Codified Law of 13 June 2006 on nuclear transparency and safety (see section 1.5 “Legislative and regulatory environment”) grants public access to information regarding in particular the nuclear safety measures taken by the operator and establishes a formal basis for transparency on nuclear safety. The implementation of the French nuclear power programme led EDF to establish a safety procedure that: takes into account, from the design stage, the risks that might arise during the ■ operation of the power plants, whether relating to the actual operation of the facilities or to internal or external attacks; is based both on the application of strict rules of operation, and on the cautious ■ and inquiring attitude of the technical teams by means of the establishment of a true safety culture; issues” and 1.4.1.1.6 “Decommissioning of nuclear power plants”. An ever-present nuclear safety procedure

1.

21

DF I Reference Document 2017